Cholecystitis - Complicated

Usual Organisms

Enterobacteriaceae (E. coli, Klebsiella, Enterobacter, Citrobacter, Proteus, Salmonella)

Streptococci

Less Likely Organisms

Enterococci (more important in health-care associated cases)

Anaerobes (generally only with biliary-enteric anastamosis): Clostridium

Bacteroides