Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Vesicular rickettsiosis
Medically reviewed by Min Clinic Staff | Updated: January 2026
Vesicular rickettsiosis: A mild infectious disease first observed in New York City, caused by Rickettsia akari, transmitted from its mouse host by chigger or adult mite bites. There is fever, a dark spot that becomes a small ulcer at the site of the bite, swollen glands (lymphadenopathy) in that region, and a raised blistery (vesicular) rash. Also known as rickettsialpox.