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  • Title: Cutaneous lesions associated with dual infection caused by canine distemper virus and orthopoxvirus in a domestic cat.
    Author: Wiener DJ, Welle MM, Origgi FC.
    Journal: Vet Dermatol; 2013 Oct; 24(5):543-e130. PubMed ID: 23869471.
    Abstract:
    BACKGROUND: Within the context of an increased epidemiological pressure caused by canine distemper virus (CDV) in Switzerland together with a potential re-emergence of endemic pathogens such as orthopoxviruses (OPXV), dual infections are possible among susceptible species. OBJECTIVE: To describe a case of concurrent CDV and OPXV infection in a cat. ANIMAL: A 5-year-old, neutered male cat was presented with erythema, crusts and ulcerations around the left eye. High-grade pruritus and a severe conjunctivitis were also present. METHODS: Formalin-fixed skin biopsy samples were obtained from lesional skin. Histopathology, CDV immunohistochemistry and CDV and OPXV RT-PCR were performed. RESULTS: Histopathological examination showed severe epidermal necrosis extending to the follicular walls and a dermal infiltration, predominantly eosinophilic. Intranuclear and intracytoplasmic eosinophilic inclusion bodies were visible in the wall of affected hair follicles, with occasional formation of syncytia. The RT-PCR revealed the contextual presence of both CDV and OPXV. Scattered cells stained positive for CDV by immunohistochemistry. CONCLUSION AND DISCUSSION: Dual infections with CDV and OPXV, although rare, may occur and represent additional differential diagnoses for ulcerative skin lesions in cats.
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