title: Case-control study evaluating the sow's risk factors associated with stillbirth piglets in Midwestern in Brazil.
abstract: 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.
authors.affiliation: Laboratório de Patologia Veterinária, Universidade Federal de Mato Grosso (UFMT), Av. Fernando Corrêa da Costa 2367, CEP 78069-900, Cuiabá, Mato Grosso, Brazil.
authors.forename: Gustavo Sousa
authors.initials: GS
authors.lastname: Silva
authors.forename: Marconni Victor
authors.initials: MV
authors.lastname: da Costa Lana
authors.forename: Geovanny Bruno Gonçalves
authors.initials: GB
authors.lastname: Dias
authors.forename: Raquel Aparecida Sales
authors.initials: RA
authors.lastname: da Cruz
authors.forename: Leticya Lerner
authors.initials: LL
authors.lastname: Lopes
authors.forename: Gustavo
authors.initials: G
authors.lastname: Machado
authors.forename: Luis Gustavo
authors.initials: LG
authors.lastname: Corbellini
authors.forename: Danielle
authors.initials: D
authors.lastname: Gava
authors.forename: Marcos Almeida
authors.initials: MA
authors.lastname: Souza
authors.forename: Caroline Argenta
authors.initials: CA
authors.lastname: Pescador
mesh_terms: D000034:Abortion, Veterinary / Q000453:epidemiology* / Q000821:virology; D000818:Animals; D001724:Birth Weight; D001938:Brazil / Q000453:epidemiology; D016022:Case-Control Studies; D018173:Circoviridae Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D017925:Circovirus / Q000302:isolation & purification*; D005260:Female; D008098:Litter Size; D011247:Pregnancy; D012307:Risk Factors; D050497:Stillbirth / Q000453:epidemiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology* / Q000821:virology