Diseases of the central nervous system in swine in Southern Brazil

ABSTRACT: Brazil is the fourth largest exporter of pork worldwide, with its production concentrated in Southern region country. To reduce economic impacts and increase herd health, an efficient diagnosis diseases necessary. The frequency, seasonal, annual distribution that affecting swine nervous system were determined through a retrospective study conducted from 2008 to 2018. A total 231 pigs evaluated, distributed following phases: suckling piglets, nursery, growing, finishing, adults. Piglets nursery phase most affected 58.01%. Infectious accounted for 87.01% (201/231) lesions system. Bacterial meningitis was observed 58.87% cases, presenting endemic distribution, propensity occur months autumn/winter. highest number cases porcine circovirus-2 2009, subsequent decline. Porcine circovirus, salt poisoning, brain abscesses exhibited no association between seasonal occurrence distribution. Salt poisoning more frequently last years this study. Both, non-suppurative encephalomyelitis selenium toxicosis their in, winter, summer, respectively.