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Pyogranulomatous dermatitis and panniculitis due to Nocardia nova in a cat/Dermatite e paniculite piogranulomatosas causadas por Nocardia nova em um gato

This report describes the clinical, pathological and microbiological findings of an uncommon infection in a cat by Nocardia nova. A 3-year-old male domestic short hair cat with an ulcerated and exudative cutaneous wound was presented for clinical examination. Samples were collected for histopatholog...

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Bibliographic Details
Published in:Ciência rural 2015-11, p.2019
Main Authors: Blume, Guilherme Reis, Ma, Matter, Leticia Beatriz, de Vargas, Agueda Palmira Castagna, de Oliveira, Leticia Batelli, Reis, Janildo Ludolf Jr, de Sant'Ana, Fabiano Jose Ferreira
Format: Article
Language:Spanish
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Summary:This report describes the clinical, pathological and microbiological findings of an uncommon infection in a cat by Nocardia nova. A 3-year-old male domestic short hair cat with an ulcerated and exudative cutaneous wound was presented for clinical examination. Samples were collected for histopathology and bacteriology diagnosis. Microscopically, the lesion was diagnosed as pyogranulomatous dermatitis and panniculitis with large and irregular colonies of branching filamentous bacterium. Skin bacteriological culture showed gram-positive rods and partially acid-fast branching filaments by gram and kinyoun staining, respectively. The identity of Nocardia nova was confirmed by 16S rDNA sequencing and phylogenetic analysis. This is the first case of pyogranulomatous dermatitis and panniculitis in a cat caused by Nocardia nova reported in Brazil. Key words: cat, dermatopathology, nocardiosis. Este relato descreve os achados clinicos, patologicos e microbiologicos de uma infeccao incomum por Nocardia nova em um gato. Um gato macho, sem raca definida, de 3 anos de idade, apresentou ferida cutanea exsudativa e ulcerada. Amostras da lesao foram coletadas para histopatologia e bacteriologia. Histologicamente, a lesao consistiu de dermatite e paniculite piogranulomatosas associadas a colonias grandes e irregulares de bacterias filamentosas e ramificadas. O cultivo bacteriologico revelou bacilos filamentosos, gram-positivos, parcialmente acido resistentes, visualizados pelas coloracoes de Gram e Kinyoun, respectivamente. A identificacao da Nocardia nova foi confirmada pelo sequenciamento 16S rDNA e analise filogenetica. Este e o primeiro caso de paniculite e dermatite piogranulomatosas em um gato causado por Nocardia nova registrado no Brasil. Palavras-chave: gato, dermatopatologia, nocardiose.
ISSN:0103-8478
DOI:10.1590/0103-8478cr20150254