immune system
• macrophages exhibited loss of cytokine production in response to LPS and low levels of heat-killed E.coli (less than 1 E.coli per cell), however macrophages stimulated with high levels (10 E.coli per cell) of heat-killed E.coli, produced cytokine levels similar to wild-type while macrophages stimulated with lower levels (less than 10 E.coli per cell) produced reduced cytokine levels
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• no IL-6 production by macrophages in response to LPS from E.coli K235
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• no TNF-alpha production by macrophages in response to LPS from E.coli K235 or to low levels of heat-killed E.coli (less than 1 E.coli per cell)
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