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      Situação epidemiológica da brucelose bovina no Estado do Paraná Translated title: Epidemiological situation of bovine brucellosis in the State of Paraná, Brazil

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          Abstract

          Realizou-se um estudo para caracterizar a situação epidemiológica da brucelose bovina no Estado do Paraná. O Estado foi estratificado em sete circuitos produtores ou regiões. Em cada circuito foram amostradas aleatoriamente cerca de 300 propriedades e, dentro dessas, foi escolhido de forma aleatória um número pré-estabelecido de animais, dos quais foi obtida uma amostra de sangue. No total, foram amostrados 14.857 animais, provenientes de 2.098 propriedades. Em cada propriedade amostrada foi aplicado um questionário epidemiológico para verificar o tipo de exploração e as práticas zootécnicas e sanitárias que poderiam estar associadas ao risco de infecção pela doença. O protocolo de testes utilizado foi o da triagem com o teste do antígeno acidificado tamponado e o reteste dos positivos com o teste do 2-mercaptoetanol. O rebanho foi considerado positivo se pelo menos um animal foi reagente às duas provas sorológicas. Para o Estado, os resultados de prevalências de focos e de animais infectados foram, respectivamente, de 4,0% [3,2-4,8%] e 1,7% [1,1-2,4%]. Para os circuitos, a prevalência de focos e a de animais foram, respectivamente: circuito 1, 14,7% [10,9-19,2%] e 2,8% [1,2-4,4%]; circuito 2, 8,8% [5,9-12,6%] e 2,4% [1,0-3,8%]; circuito 3, 3,4% [1,6-6,1%] e 0,85% [0,21-1,5%]; circuito 4, 2,3% [0,94-4,8%] e 0,83% [0,02-1,6%]; circuito 5, 2,3% [0,94-4,7%] e 1,6% [0,06-3,3%]; circuito 6, 0,3% [0-1,9%] e 0,09% [0-0,27%]; circuito 7, 1,0% [0,21-2,9%] e 2,2% [0-6,0%]. Os fatores de risco (odds ratio, OR) associados à condição de foco foram: compra de reprodutores (OR= 2,20 [1,42-3,40]) e prática de aluguel de pasto (OR= 2,45 [1,54-3,90]).

          Translated abstract

          A study to characterize the epidemiological situation of bovine brucellosis in the State of Paraná was carried out. In this study, the State was divided into seven regions. Three hundred herds were randomly sampled in each region and a pre-established number of animals were sampled in each of these herds. A total of 1,4857 serum samples from 2,098 herds were collected. In each herd, it was applied an epidemiological questionnaire regarding herd features and also husbandry and sanitary practices that could be associated with risk of infection. The serum samples were screened for antibodies against Brucella spp. by the Rose-Bengal test (RBT), and all RBT-positive sera were re-tested by the 2-mercaptoethanol test (2-ME). A herd was considered positive if at least one animal was positive on both RBT and 2-ME tests. The prevalences of infected herds and infected animals in Paraná State were 4.0% [3.2-4.8%] and 1.7% [1.1-2.4%], respectively. In the regions, the prevalences of infected herds and animals were: region 1, 14.7% [10.9-19.2%] and 2.8% [1.2-4.4%]; region 2, 8.8% [5.9-12.6%] and 2.4% [1.0-3.8%]; region 3, 3.4% [1.6-6.1%] and 0.85% [0.21-1.5%]; region 4, 2.3% [0.94-4.8%] and 0.83% [0.02-1.6%]; region 5, 2.3% [0.94-4.7%] and 1.7% [0.06-3.3%]; region 6, 0.34% [0-1.9%] and 0.09% [0-0.27%]; and region 7, 1.0% [0.21-2.9%] and 2.2% [0-6,0%]. The risck factors (odds ratio, OR) associated with the presence of the infection were: purchase of animals for breeding (OR= 2.20 [1.42-3.40]) and pasture rental practice (OR=2.45 [1.54-3.90]).

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          Most cited references20

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          Veterinary Epidemiology

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            Clinical Epidemiology. The essentials

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              The epidemiology of bovine brucellosis

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                Author and article information

                Contributors
                Role: ND
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                Journal
                abmvz
                Arquivo Brasileiro de Medicina Veterinária e Zootecnia
                Arq. Bras. Med. Vet. Zootec.
                Universidade Federal de Minas Gerais, Escola de Veterinária (Belo Horizonte )
                1678-4162
                November 2009
                : 61
                : suppl 1
                : 66-76
                Affiliations
                [1 ] Universidade Estadual de Londrina Brazil
                [2 ] USP
                [3 ] Secretaria de Agricultura e Abastecimento do Estado do Paraná
                [4 ] MAPA
                [5 ] UnB
                Article
                S0102-09352009000700009
                10.1590/S0102-09352009000700009
                da5e4eac-feb0-42a2-b4b6-935f96e48013

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0102-0935&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                cattle,brucellosis,prevalence,risk factors,brucelose,prevalência,fatores de risco,Paraná,Brazil,bovino

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