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Just remember that E.Coli and Bacteriodes Fragilis (sp?) are the 2 main gutys that cause intraperitoneal infections from the gut.
Common organisms involved in gangrenous and perforated appendicitis include Escherichia coli, Peptostreptococcus, Bacteroides fragilis, and Pseudomonas species (UpToDate)
Nobody mentioned why it's not citrobacter. It's also an inhabitant of the intestinal flora. What an annoying quetion.
submitted by ∗bwdc(697)
While E coli is normal gut flora, your body would prefer it stay intraluminal.