Swinepox dermatitis in backyard pigs in Northeastern Brazil.

 

Autor(es):

OLINDA, R. G. ; MAIA, L. A. ; CARGNELUTTI, J. F. ; GOIS, R. C. S. ; BATISTA, J. S. ; DANTAS, A. F. M. ; FLORES, E. F. ; RIET-CORREA, F.

Tipo:

Artículo

Versión:

Publicado

Resumen:

This article describes five outbreaks of swinepox in backyard pigs in Northeastern Brazil. It affected backyard pigs from herds of poor hygienic-sanitary conditions with severe fly and lice infestations. The morbidity ranged from 33.3 to 100% among affected herds, with mortality reaching up to 60%. The affected pigs developed multifocal to coalescent gray to white papules and blisters in the skin, with eventual eruptions, evolving to erosions and crusts. In addition to skin lesions, affected piglets presented apathy, anorexia and fever. The disease was auto-limiting, resolving within 15 to 25 days. Histological examination revealed proliferative and ulcerative vesiculopustular dermatitis with ballooning degeneration of epithelial cells, perivascular inflammatory infiltrates of lymphocytes, plasma cells, neutrophils, eosinophils and some macrophages in the dermis. Intracytoplasmic eosinophilic inclusions were consistently observed in keratinocytes. Total DNA extracted from fresh tissue fragments obtained from one outbreak and formalin-fixed, paraffin-embedded (FFPE) tissue from the other four outbreaks was submitted to polymerase chain reaction (PCR) for Swinepox virus (SWPV) and Vaccinia virus (VACV). Genetic SWPV material was identified by PCR in fresh material from one outbreak. Nucleotide sequencing and phylogenetic analysis of the PCR amplicons (viral polymerase gene) demonstrated 100% homology with sequences from SWPV. All tissues were PCR negative for VACV. Swine poxvirus is present in backyard pigs in Northeastern Brazil, indicating the need of including SWPV in the differential diagnosis of dermatitis in pigs.

Año:

2016

Idioma:

Inglés

Temas:

Doença viral
Dermatitis
Poxviridae
Swine
Viral diseases of animals and humans
Dermatite
Suíno
Varíola

Institución:

Instituto Nacional de Investigación Agropecuaria

Repositorio:

Ainfo

Enlace(s):

http://www.ainfo.inia.uy/consulta/busca?b=pc&id=57176&biblioteca=vazio&busca=57176&qFacets=57176

Nivel de acceso:

Acceso abierto