Estudo caso-controle avaliando os fatores de risco relacionados à natimortalidade em leitões do Centro Oeste do Brasil

• Autor(a) principal: Silva, Gustavo de Sousa e
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/533
• topic: Fêmea suína; Natimorto; Reprodução; Leitão; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA; Sow; Stillbirth; Reproduction; Piglets

Reproductive failure in swine herds is often difficult to diagnose. Our aim was to identify the potential risk factors (infectious/non-infectious) for stillborn piglets in two commercial swine farms situated in midwestern region of Brazil. Data were collected from 96 sows that produced stillborn piglets (cases) and 96 sows that did not (controls). The potential risk factors were included in the multivariable logistic model as categories: parity (1, 2, 3–6 and >6), moment of farrowing (during day or night: between 6:00–20:00 and 20:00–6:00, respectively) and duration of parturition (<2 h, 2-4 h and >4 h). The dependent variable was defined as the presence of at least one stillborn piglet in a given litter (yes or no). In the best fit model, two variables from the multivariable analysis, total litter size (p= 0.01), and average birth weight (p=0.03), were significantly associated with the presence of stillborn piglets at the farms examined in this study. PCV2 was detected in 29.1% of the litters. Neither PPV nor Leptospirosis infections were identified in this study, suggesting that they have a minor impact on reproductive disease.