mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                abnormal leukocyte cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal hematopoietic cell number
                                                decreased hematopoietic cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal leukocyte cell number
                                                        decreased leukocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal B cell number
                                                                                decreased B cell number
                                                                                        decreased mature B cell number
                                                                                                absent mature B cells +
                                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                        absent B-1 B cells +
                                                                                                        decreased B-1a cell number +
                                                                                                        decreased B-1b cell number +
                                                                                                decreased B-2 B cell number +
                                                                                                decreased follicular B cell number +
                                                                                                decreased germinal center B cell number +
                                                                                                decreased marginal zone B cell number +
                                                                                                decreased memory B cell number +
                                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal mature B cell morphology
                                                                                abnormal B-1 B cell morphology
                                                                                        abnormal B-1 B cell number
                                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                        absent B-1 B cells +
                                                                                                        decreased B-1a cell number +
                                                                                                        decreased B-1b cell number +
                                                                                                increased B-1 B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal B cell morphology
                                                                        abnormal mature B cell morphology
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal lymphocyte cell number
                                                                        abnormal B cell number
                                                                                decreased B cell number
                                                                                        decreased mature B cell number
                                                                                                absent mature B cells +
                                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                        absent B-1 B cells +
                                                                                                        decreased B-1a cell number +
                                                                                                        decreased B-1b cell number +
                                                                                                decreased B-2 B cell number +
                                                                                                decreased follicular B cell number +
                                                                                                decreased germinal center B cell number +
                                                                                                decreased marginal zone B cell number +
                                                                                                decreased memory B cell number +
                                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal hematopoiesis
                                        abnormal leukocyte morphology
                                                abnormal mononuclear cell morphology
                                                        abnormal lymphocyte morphology
                                                                abnormal lymphocyte cell number
                                                                        decreased lymphocyte cell number
                                                                                decreased B cell number
                                                                                        decreased mature B cell number
                                                                                                absent mature B cells +
                                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                        absent B-1 B cells +
                                                                                                        decreased B-1a cell number +
                                                                                                        decreased B-1b cell number +
                                                                                                decreased B-2 B cell number +
                                                                                                decreased follicular B cell number +
                                                                                                decreased germinal center B cell number +
                                                                                                decreased marginal zone B cell number +
                                                                                                decreased memory B cell number +
                                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        abnormal B cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                decreased leukocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal mature B cell morphology
                                                                        abnormal B-1 B cell morphology
                                                                                abnormal B-1 B cell number
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        increased B-1 B cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal mature B cell morphology
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        hematopoietic system phenotype
                abnormal hematopoietic system morphology/development
                        abnormal blood cell morphology/development
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        abnormal B cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                abnormal lymphocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal leukocyte cell number
                                                decreased leukocyte cell number
                                                        decreased lymphocyte cell number
                                                                decreased B cell number
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal mature B cell morphology
                                                                        abnormal B-1 B cell morphology
                                                                                abnormal B-1 B cell number
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        increased B-1 B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal B cell morphology
                                                                abnormal mature B cell morphology
                                                                        decreased mature B cell number
                                                                                absent mature B cells +
                                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                        absent B-1 B cells +
                                                                                        decreased B-1a cell number +
                                                                                        decreased B-1b cell number +
                                                                                decreased B-2 B cell number +
                                                                                decreased follicular B cell number +
                                                                                decreased germinal center B cell number +
                                                                                decreased marginal zone B cell number +
                                                                                decreased memory B cell number +
                                                                                decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                abnormal B cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal leukocyte morphology
                                        abnormal mononuclear cell morphology
                                                abnormal lymphocyte morphology
                                                        abnormal lymphocyte cell number
                                                                decreased lymphocyte cell number
                                                                        decreased B cell number
                                                                                decreased mature B cell number
                                                                                        absent mature B cells +
                                                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                                                absent B-1 B cells +
                                                                                                decreased B-1a cell number +
                                                                                                decreased B-1b cell number +
                                                                                        decreased B-2 B cell number +
                                                                                        decreased follicular B cell number +
                                                                                        decreased germinal center B cell number +
                                                                                        decreased marginal zone B cell number +
                                                                                        decreased memory B cell number +
                                                                                        decreased plasma cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal professional antigen presenting cell morphology
                                        abnormal mature B cell morphology
                                                abnormal B-1 B cell morphology
                                                        abnormal B-1 B cell number
                                                                decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                        absent B-1 B cells +
                                                                        decreased B-1a cell number +
                                                                        decreased B-1b cell number +
                                                                increased B-1 B cell number +

---

mammalian phenotype
        immune system phenotype
                abnormal immune system morphology
                        abnormal immune system cell morphology
                                abnormal professional antigen presenting cell morphology
                                        abnormal mature B cell morphology
                                                decreased mature B cell number
                                                        absent mature B cells +
                                                        decreased B-1 B cell number [MP:0004978] (124 genotypes, 141 annotations)
                                                                absent B-1 B cells +
                                                                decreased B-1a cell number +
                                                                decreased B-1b cell number +
                                                        decreased B-2 B cell number +
                                                        decreased follicular B cell number +
                                                        decreased germinal center B cell number +
                                                        decreased marginal zone B cell number +
                                                        decreased memory B cell number +
                                                        decreased plasma cell number +

---