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Nasal rhinosporidiosis in dogs: four cases from Europe and a review of the literature
  1. M. Caniatti, DVM1,
  2. P. Roccabianca, DVM1,
  3. E. Scanziani, DVM1,
  4. M. Finazzi, DVM1,
  5. C. M. Mortellaro, DVM2,
  6. S. Romussi, DVM2 and
  7. G. Mandelli, DVM1
  1. 1 Istituto di Anatomia Patologica Veterinaria e Patologia Aviare
  2. 2 Istituto di Clinca Chirurgica Veterinaria, UniversitA degli Studi di Milano, Via Celoria, 10, 20133, Milano, Italy

Abstract

This paper describes four cases of canine rhinosporidiosis which occurred in Italy in 1994 and 1995. Four dogs with a history of exposure to the muddy environment of rice fields, developed respiratory signs. Rhinoscopy revealed nasal polypoid lesions with a characteristic gross appearance due to the presence of multiple, tiny, white-yellowish spots representing sporangia filled with spores. In cytological samples obtained by brushing, many spores were present in an inflammatory background. Histologically, the polyps consisted of fibrovascular tissue embedding sporangia in different developmental stages, and free spores which elicited a severe pyogranulomatous inflammation. All the dogs were treated surgically and the condition did not recur in two cases during a year's follow- up and in the other two cases during two years.

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