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Is bluetongue virus a risk factor for reproductive failure in tropical hair sheep in Brazil?
Rizzo, Huber; Balaro, Mario Felipe Alvarez; Matos, Ana Carolina Diniz; Lobato, Zélia Inês Portela; Gregory, Lilian.
Afiliação
  • Rizzo, Huber; Universidade Federal Rural de Pernambuco. Department of Veterinary Medicine. Recife. BR
  • Balaro, Mario Felipe Alvarez; Universidade Federal Fluminense. Department of Pathology and Clinical Veterinary. Niterói. BR
  • Matos, Ana Carolina Diniz; Universidade Federal de Minas Gerais. Department of Preventive Veterinary Medicine. Belo Horizonte. BR
  • Lobato, Zélia Inês Portela; Universidade Federal de Minas Gerais. Department of Preventive Veterinary Medicine. Belo Horizonte. BR
  • Gregory, Lilian; Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Department of Clinical Medicine. São Paulo. BR
Acta sci. vet. (Impr.) ; 49: Pub.1812-2021. tab, graf
Article em En | VETINDEX | ID: biblio-1458451
Biblioteca responsável: BR68.1
Localização: BR68.1
ABSTRACT

Background:

Bluetongue is a vector-borne viral disease transmitted by midges from the genus Culicoides. The disease caninfect most of the ruminant and camelid species, but the severe disease is most often seen in european wool and muttonsheep breeds. In this sense, there is a gap in the knowledge on BTV infection in hair sheep breeds from tropical zones.Thus, this study aimed at establishing whether exposure to BTV is a risk factor for reproductive failure in Santa Inês ewes,a hair sheep breed, reared under tropical conditions in Brazil.Materials, Methods &

Results:

A retrospective cross-sectional study was carried out in sheep farms in São Paulo state,Brazil, after the rainy season. Serum samples from 110 Santa Inês ewes with a history of reproductive disorders, in the last6 months, which were included abortion, premature birth, stillbirth, retention of placenta, infertility, estrus repetition, fetalmalformation, weak lamb birth and neonatal death were collected. The presence of antibodies against BTV was assessedby agar gel immunodiffusion method (AGID). Serology to the infectious agents Brucela ovis, Lepstopira spp., Toxoplasmagondii, Neospora caninum and Campylobacter sp. were also assessed. Bivariate associations between the outcome andindividual explanatory variables were assessed using the Fisher’s exact test. Abortion was the most common reproductive disorder (53%; 74/139) observed, followed by estrus repetition (12%; 17/139) and infertility (11%; 15/139). Otherdisorders related to the conceptus totaled nearly one fourth of the reported disorders. A total of 20% (22/110) of the eweswere seropositive to BTV. A higher frequency of BTV seropositive than BTV seronegative ewes with a history of abortionwas found. Also, abortion with seroreactivity to BTV was tested for prevalence ratio that showed 1.38 [95% CI 1.10-1.74;P = 0.030]. With regards to the abortion involvement of other infectious diseases associated with the seropositive ewes to...
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Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Acta sci. vet. (Impr.) Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: VETINDEX Idioma: En Revista: Acta sci. vet. (Impr.) Ano de publicação: 2021 Tipo de documento: Article