Aspectos epidemiológicos das infecções por Leptospira spp., Toxoplasma gondii e Chlamydophila abortus em suínos de granjas tecnificadas no estado de Alagoas

Abstract

The objective of this study was to determine the prevalence and identify the risk factors associated with infection by Leptospira spp. in commercial pig farms in the state of Alagoas, Brazil. To compose the study, were used 342 pigs (312 sows and 30 boars) from at seven swine herds distributed in five districts of the state of Alagoas. The serological diagnosis of infection was done by Microscopic Agglutination Test (SAM). The risk factors analysis was performed by the application of research questionnaires, consisting of objective questions relating to the designer, the general characteristics of the property, the production management, and reproductive health. Detected a prevalence of 16.10% (55/352) of pigs positive. The risk factors associated were: The not perform quarantine (p = 0.003, OR = 5.43, CI = 1.79 -16.41) and artificial insemination utilization (p = 0.023, OR = 3.38, CI = 1.18 - 9, 66). Was foundsignificant association of sows infection with the increased number of stillborn and mummified, and with the increase frequency of estrus recurrence and increased the numbers of days from weaning to service of seropositive sows. It is concluded that infection with Leptospira spp. is disseminated in commercial pig farms in the state of Alagoas, favoring the reproductive failures and decrease of zootechnical performance. The risk factors identified in this study are facilitators in the dissemination of infection and should be adjusted to control the disease in the herds studied.