Microsporum nanum : First Recorded Isolation from Animals in the United States

Abstract

The first cases in the United States of swine infections caused by the fungus Microsporum nanum are reported. The infections occurred in a herd of Yorkshire swine in Pennsylvania. The dermatophyte, which readily produced experimental infections, was identified by isolation and studies in pure cultures.

Microsporum Nanum

“…An outbreak of swine ringworm in Centre County, Pa, in 1964, caused by M nanum was reported by Bubash et al 9 Ginther et al10,11 also reported swine infections in Kansas, Kentucky, New Jersey, and Pennsyl¬ vania. Early in 1964, Ginther and Ajello 12 discussed the prevalence of this organism in the United States and recorded its isolation from soil and swine in 12 states, including Texas.…”