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Case–control study evaluating the sow’s risk factors associated with stillbirth piglets in Midwestern in Brazil

Silva, Gustavo Sousa, da Costa Lana, Marconni Victor, Dias, Geovanny Bruno Gonçalves, da Cruz, Raquel Aparecida Sales, Lopes, Leticya Lerner, Machado, Gustavo, Corbellini, Luis Gustavo, Gava, Danielle, Souza, Marcos Almeida, Pescador, Caroline Argenta
Tropical animal health and production 2015 v.47 no.2 pp. 445-449
Porcine circovirus-2, animal health, birth weight, case-control studies, farms, fetal death, herds, leptospirosis, litter size, logit analysis, models, multivariate analysis, piglets, risk factors, sows, swine production, Brazil
Reproductive failure in swine herds is often difficult to diagnose and is important to swine production. The present study aims to identify the potential risk factors (infectious/noninfectious) for stillborn piglets in two commercial swine farms situated in midwestern region of Brazil. The potential risk factors were included in a multivariable logistic model, and 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. Porcine circovirus type 2 (PCV2) was detected in 29.1 % of the litters. Neither parvovirus (PPV) nor leptospirosis infections were identified in this study, suggesting that they have a minor impact on reproductive disease.