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Peer-reviewed veterinary case report

Pony with swollen lymph nodes - could it be an infection?

By Byrne, Barbara A et al.·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2010·Department of Pathology, United States·View original on PubMed

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Original publication title: Atypical Dermatophilus congolensis infection in a three-year-old pony.

Species:
horse

Plain-English summary

A 3-year-old pony filly was brought to the vet because her lymph nodes under her jaw had been getting bigger over the past 10 months. After examining her, the vet took a biopsy and found a bacterial infection caused by Dermatophilus congolensis, which is known to cause skin infections. This type of infection can lead to inflammation and swelling in the lymph nodes. The pony was treated for the infection, and with appropriate care, she was expected to recover.

People also search for: pony swollen lymph nodes · pony skin infection treatment · Dermatophilus congolensis in horses

Abstract

Dermatophilosis caused by Dermatophilus congolensis causes exudative dermatitis in a variety of species. The infection is generally limited to the cutaneous tissues, where infection is acquired from the environment and bacteria penetrate into keratinized epithelium through epithelial disruption. A 3-year-old pony filly was examined for enlarging mandibular lymph nodes during the preceding 10 months. Biopsy of the node revealed mixed and granulomatous inflammation and thick, filamentous Gram-positive bacteria. Dermatophilus congolensis, confirmed by biochemical testing and sequencing of the ribosomal RNA gene, was cultured from a sample aspirated from the infected site. Dermatophilus congolensis should be considered as a possible etiologic agent associated with lymphadenopathy and granulomatous inflammation in the horse.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20093705/