Equine cutaneous pythiosis: a report of four cases

Abstract

Cutaneous pythiosis is described in four horses in Northern Paraná, Brazil. All animals presented ulcerative, granulomatous, cutaneous lesions that did not invade adjacent muscular tissues. Histopathological evaluations revealed eosinophilic granulomatous reactions associated with intralesional hyphae suggestive of Pythium insidiosum observed at the margins of coagula. P. insidiosum hyphae were visualized by Gomori’s methenamine silver stain.Descreve-se pitiose cutânea em quatro cavalos no norte de Paraná, Brasil. Os animais apresentaram lesões cutâneas, ulcerativas e granulomatosas que não alcançaram o tecido muscular adjacente. Avaliação histopatológica revelou reação granulomatosa eosinofílica associada a hifas intralesionais sugestivas de Pythium insidiosum. As hifas de P. insidiosum foram observadas na coloração especial de prata de Gomori.