Peer-reviewed veterinary case report
Black nodules on dog's neck linked to Exophiala dermatitidis infection
By Kano, R et al.·Published in Veterinary microbiology·2000·Department of Pathobiology, Japan·View original on PubMed →
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Original publication title: First isolation of Exophiala dermatitidis from a dog: identification by molecular analysis.
- Species:
- dog
Plain-English summary
A dog with multicentric lymphoma developed 10-15 black or purple lumps on its neck, which led to a diagnosis of a fungal infection caused by Exophiala dermatitidis. The lumps were examined, revealing specific types of immune cells and fungal structures. The infection was confirmed through laboratory tests that identified the fungus at a genetic level. This case marks the first time this particular fungus has been isolated from a dog. Treatment details were not provided, but early identification is crucial for managing such infections.
People also search for: dog lumps on neck · Exophiala dermatitidis in dogs · dog lymphoma treatment · fungal infection in dogs
Abstract
The present study deals with the first isolation of Exophiala dermatitidis from a dog. The dog had a history of multicentric lymphoma for 4 months. On physical examination, 10-15 black or purple subcutaneous nodules were detected on the dorsum of the right neck. Microscopic examination of biopsy specimen from the nodules disclosed lymphocytes, neutrophils and moniliform hyphae. The colony of the clinical isolate was flat with black aerial hyphae and a wet margin after 2 weeks incubation on Sabouraud's dextrose agar at 27 degrees C. The microscopic examination of the clinical isolate revealed that hyphae were brown, septate, and smooth, producing branched or unbranched conidiospores laterally or on the apex. The conidia were one celled, subglobose, elliptical to cylindrical, smooth and hyaline. Nucleotide sequence analysis of the chitin synthase 2 (CHS2) gene fragments from the isolate and a reference strain of E. dermatitidis showed more than 99% similarity.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/10946150/