Appendicitis

Scott M. Smith, M.D., Christopher F. Carpenter, M.D.

PATHOGENS

Anticipate polymicrobial gastrointestinal flora:
- Enterobacterales (e.g. Escherichia coli, Klebsiella spp., and Enterobacter spp.)
- Anaerobes (e.g., Bacteroides spp.)
- Gram-positive cocci (e.g., Enterococcus spp, Streptococcus spp.)
Fungi: (e.g., Candida spp) are less common
In community-acquired infections, the major pathogens are Enterobacterales and anaerobes.
In healthcare-associated infections or recent broad-spectrum antibiotic exposure, yeast, enterococci, resistant Gram-negative organisms, and Staphylococcus aureus may be seen.

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