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Year 2012 - Volume 32, Number 11
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Strategy for eradication of outbreaks of Aujeszky’s Disease in pigs in the São Paulo state, 32(11):1121-1126
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ABSTRACT.- Oliveira L.G., Oliveira M.E.F., Alexandrino B. & Samara S.I. 2012. [Strategy for eradication of outbreaks of Aujeszky’s Disease in pigs in the São Paulo state.] Estratégia para erradicação de focos da Doença de Aujeszky em suínos no Estado de São Paulo. Pesquisa Veterinária Brasileira 32(11):1121-1126. Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Via de acesso Prof. Paulo Donato Castellane s/n, Jaboticabal, SP14884-900, Brazil. E-mail: luis.guilherme@cda.sp.gov.br
This study aimed to evaluate strategies for eradication of Aujeszky Disease (AD) virus infection after outbreaks in swine production systems in Sao Paulo state. Two outbreaks were identified in Cerqueira César county. The first outbreak coursed with seropositive pigs (outbreak 1), and the other with pigs presenting clinical signs (outbreak 2). In order to eradicate the infection, two sanitary strategies were tested: (1) eradication of animals with positive serology and (2) by gradual depopulation, with a follow up of 12 months. The serology eradication was used in outbreak 1, and included the identification, isolation and slaughter of positive animals; followed by vaccination of negative animals and replacement with pigs from farms free of the disease. At the beginning, 68% of pigs were positive, and at the end it declined to 51%. In outbreak 2, gradual depopulation was used, and all animals were sent to sanitary slaughter, until facilities were completely empty. Afterwards, animals free of the disease were used for repopulation. It was seen that the last strategy was more effective because eradicated the infection. |
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