1. Pathological and virological features of skin lesions caused by BVDV in cattle
- Author
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David Driemeier, Cláudio Wageck Canal, Matheus Viezzer Bianchi, Simone Silveira, A. C. S. Mósena, Suyene Oltramari de Souza, Guilherme Konradt, and Saulo Petinatti Pavarini
- Subjects
medicine.medical_specialty ,Pathology ,animal diseases ,viruses ,Mucocutaneous zone ,Hyperkeratosis ,Antibodies, Viral ,Skin Diseases ,Microbiology ,Virus ,03 medical and health sciences ,Ballooning degeneration ,Media Technology ,medicine ,Animals ,Phylogeny ,Skin ,030304 developmental biology ,0303 health sciences ,Diarrhea Viruses, Bovine Viral ,biology ,030306 microbiology ,Veterinary Microbiology - Research Paper ,Pestivirus ,medicine.disease ,biology.organism_classification ,Immunohistochemistry ,Bovine Virus Diarrhea-Mucosal Disease ,Cattle ,Histopathology ,Spongiosis - Abstract
Dermatitis might occur in mucosal disease (MD) caused by bovine viral diarrhea virus (BVDV). This study describes the pathological and virological features of skin lesions associated with BVDV infection in four persistently infected (PI) cattle. Skin samples were reprocessed for histopathology and IHC. BVDV isolates were obtained and were genetically characterized. In addition to upper alimentary system ulcerative lesions, all cattle (one outbreak and three individual cases) presented focal crusty and ulcerative lesions affecting the mucocutaneous and skin-horn junctions, interdigital clefts, pastern, and areas surrounding the dewclaws and diffuse thickened skin within 7–20 days of infection. Microscopic analysis revealed parakeratotic hyperkeratosis and single-cell keratinocyte death, accompanied by ballooning degeneration and spongiosis in the epidermis, as well as intraepithelial and subcorneal pustules. IHC showed BVDV antigen in the cytoplasm of keratinocytes undergoing individual cell death. Phylogenetic analysis revealed that the isolates from cattle #1, #2, and #4 belonged to BVDV-1a, whereas that from cattle #3 belonged to BVDV-1d. Cytopathic BVDV was isolated from cattle #2 and #3 (MD), and non-cytopathic BVDV was isolated from cattle #1 and #4. Thus, BVDV infection might cause acute disease, characterized by skin and upper alimentary system ulcerative lesions, in both MD and PI cattle.
- Published
- 2018
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