Which organism is NOT typically an anaerobic pathogen in cat bite abscesses?

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Study for the Clinical Approach to Common Infections Test. Prepare using flashcards and multiple-choice questions, all with hints and explanations. Ace your exam!

Multiple Choice

Which organism is NOT typically an anaerobic pathogen in cat bite abscesses?

Explanation:
The key idea is that cat bite abscesses are usually polymicrobial and dominated by anaerobic bacteria from the cat’s oral flora. In these infections, anaerobes such as Porphyromonas, Fusobacterium, and Peptostreptococcus are commonly involved because they thrive in the low-oxygen environments inside an abscess. Staphylococcus aureus, on the other hand, is not an anaerobe; it grows with or without oxygen (a facultative anaerobe) and is more typically associated with skin and soft-tissue infections rather than the anaerobic oral flora that characterizes many cat bite abscesses. So, Staphylococcus aureus is not typically an anaerobic pathogen in this context.

The key idea is that cat bite abscesses are usually polymicrobial and dominated by anaerobic bacteria from the cat’s oral flora. In these infections, anaerobes such as Porphyromonas, Fusobacterium, and Peptostreptococcus are commonly involved because they thrive in the low-oxygen environments inside an abscess. Staphylococcus aureus, on the other hand, is not an anaerobe; it grows with or without oxygen (a facultative anaerobe) and is more typically associated with skin and soft-tissue infections rather than the anaerobic oral flora that characterizes many cat bite abscesses. So, Staphylococcus aureus is not typically an anaerobic pathogen in this context.

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