Erysipelothrix infections in humans characteristically produce pathology at which site?

• A. Pathology at the point of entrance of the organism
• B. Central nervous system pathology
• C. Pathology in the lower respiratory tract
• D. The formation of abscesses in visceral organs

Answer: (A)

Erysipelothrix infections in humans are classically acquired through inoculation of the skin, so the resulting pathology appears at the site where the organism entered. This typically presents as a localized erythematous, painful lesion on the hands or fingers (the erysipeloid), especially in people who handle fish, meat, or poultry and have minor skin breaks. The reaction is a localized inflammatory response at that entry point rather than spread to distant organs. While rare systemic complications like bacteremia or endocarditis can occur in some cases, they are not the characteristic pattern. Therefore, the hallmark site of disease is the entry point on the skin.