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OJVRTM
Online Journal of Veterinary Research©
(Including
Medical and Laboratory Research)
Established
1994
ISSN 1328-925X
Volume 27
(10): 553-561, 2023.
Cutaneous phaeohyphomycosis
in a horse.
Eberly J1 DVM, Wilke M2 DVM,
Singh K3 DVM, PhD DACVP.
1Pathobiology, 3Veterinary Diagnostic Laboratory, College of
Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, 2Griggsville
Veterinary Clinic (Wilke), Griggsville, IL, USA. 62340 .
ABSTRACT
Eberly J, Wilke M, Singh K., Cutaneous phaeohyphomycosis in a horse, Onl
J Vet Res., 27
(10): 553-561, 2023. A 4 year old intact female Quarter horse was presented
for evaluation of multiple, non-painful, chronic cutaneous lesions on each
wither. The lesions were slightly raised, approximately 2 cm in diameter, dark
brown to black and ulcerated. These lesions were surrounded by hyperkeratotic
rough dry skin and did not respond to previous antibiotic treatment.
Histologically, cutaneous lesions were ulcerated and covered by neutrophils.
The dermis was diffusely infiltrated by numerous epitheloid
macrophages admixed with multinucleate giant cells, neutrophils, lymphocytes,
plasma cells and rare eosinophils. Often inflammatory cells were arranged in
discrete pyogranulomas and granulomas. Admixed with the inflammatory cells were brown, round, 7-50 µm fungal bodies. Fungal culture
revealed Bipolaris Spicifera.
The clinical presentation, gross and microscopic morphology and mycotic culture
in this case are consistent with cutaneous phaeohyphomycosis.
Key words: Bipolaris, cutaneous, dematiaceous,
horse, phaeohyphomycosis.
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