Phagocytic activity of chicken peritoneal macrophage against Salmonella typhimurium poultry isolates

Phagocytic index (PI) of chicken peritoneal macrophages was assayed in resi dent and protease peptone elicited macrophages after in vitro infection wit h 4 S. typhimurium poultry isolates, E 1841 (nonvirulent), E 2336 (less vir ulent), E 2187 and E 2385 (virulent) and a virulent reference European stra in F 98. Higher phagocytic index of elicited chicken peritoneal macrophages after in vitro infection with S. typhimurium isolates. The PI of resident chicken peritoneal macrophages ranged from 123+/-4.22 (with reference strai n F 98) to 182 +/- 6.05 (with isolate E 2336). The maximum PI of elicited m acrophages was observed with isolate E 1841 (230.25 +/- 4.98) and lowest wi th reference strain F 98 (159.75 +/- 3.73).