Furuncular myiasis caused by Dermatobia hominis in a domestic cat - case report.

Dermatobiosis is defined as a parasitosis caused by the larval stage of the human botfly Dermatobia hominis, often observed in large animals but considered unusual in pet animals. The aim of the report is to describe a naturally infested cat treated in a reference dermatology service with clinical presentation similar to neoplasia or abscess. A six-year-old spayed male Brazilian Shorthair cat with outdoor access, from the countryside of Rio de Janeiro state, was treated for two nodules, one located in the sacral region and one in the tail. The patient was restrained, and digital compression of the lesions resulted in expulsion of D. hominis larvae, accompanied by a purulent secretion. The removal of larvae and use of antiseptic at the site resolved the furuncular myiasis. It is possible to assume that the parasitism reported here resulted from the animal's living arrangement, in a rural area with cattle parasitized by D. hominis. We conclude that parasitism by D. hominis should be present on the list of differential diagnoses of cats with nodules and that mechanical removal associated with the use of antiseptics is resolutive.

A dermatobiose é definida como uma parasitose causada pelo estágio larval da mosca humana Dermatobia hominis, frequentemente observada em animais de grande porte, mas considerada incomum em animais de companhia. O objetivo do relato é descrever um gato naturalmente infestado atendido em um serviço de referência em dermatologia com quadro clínico semelhante a neoplasia ou abscesso. Um gato brasileiro de pelo curto, macho, castrado, de seis anos, com acesso ao ar livre, procedente do interior do estado do Rio de Janeiro, foi tratado de dois nódulos, um localizado na região sacral e outro na cauda. O paciente foi contido e a compressão digital das lesões resultou na expulsão das larvas de D. hominis, acompanhada de secreção purulenta. A retirada das larvas e o uso de antisséptico no local resolveram a miíase furuncular. É possível supor que o parasitismo aqui relatado resultou do arranjo de vida do animal, em área rural com gado parasitado por D. hominis. Concluímos que o parasitismo por D. hominis deve estar presente na lista de diagnósticos diferenciais de gatos com nódulos e que a remoção mecânica associada ao uso de antissépticos é resolutiva.

An unusual case of feline otitis externa due to sporotrichosis.

CASE SUMMARY: It is described a case of a 10-month-old female mixed-breed cat with left ear discharge of approximately 6 days' duration prior to the admission. Secretions were collected from both ears using a sterile swab for cytological and mycological analysis. A pyogranulomatous inflammatory infiltrate (predominantly characterized by the presence of neutrophils and macrophages) with the presence of cocci, rods and many yeast-like structures were seen on cytological analysis; the fungal culture confirmed the presence of the Sporothrix schenckii complex. Upon diagnosis of fungal otitis due to the S schenckii complex, treatment with oral itraconazole was administered. After 4 weeks of treatment, no S schenckii complex colonies were isolated, and clinical recovery had occurred. RELEVANCE AND NOVEL INFORMATION: Although rare, clinicians must be aware of atypical presentations of sporotrichosis, as in this case of external otitis. This is of clinical relevance because this infection has been reported in several countries and is defined as a zoonotic disease.