Analysis of the risk factors for bovine brucellosis in dairy herds of the Rio Branco microregion, Acre, Brazil

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posted on 2019-10-16, 02:42 authored by Tamyres Izarelly Barbosa da Silva, Raíssa Souza de Moraes, Priscila de Souza Santos, Guilherme Henrique Reckziegel, Yuri Almeida Gomes, Leonardo Augusto Kohara Melchior, Artur Cezar de Carvalho Fernandes, Luiz Carlos Fontes Baptista Filho, Daniel Dias da Silva, Renata Gomes Revoredo, Lúcio Esmeraldo Honório de Melo

ABSTRACT Bovine brucellosis (BB) is a compulsory notifiable bacterial disease caused by Brucella abortus, which is responsible for severe reproductive disorders in cattle, considerable damages to trade and public health damage. The objectives of this study were to identify the frequency of BB and to analyze the risk factors in the dairy herds of the Rio Branco microregion, in the state of Acre, Brazil. Thus, 527-bovine-serological samples were submitted to the buffered acidified antigen test and to 2-mercaptoethanol. Risk factors were characterized by the administration of epidemiological questionnaires. The logistic regression test was used to evaluate the existence of a significant association between the variables. The frequency of BB in the Rio Branco microregion was 10.6% (56/527). The inappropriate destination of the aborted fetus and placental remnants (odds ratio — OR = 13.6), the slaughter of cattle within the property (OR = 3.4) and the age range above 4 years old (OR = 2.9) were the most significant risk factors identified by the logistic regression model. According to the results of this study, it is recommended to intensify BB control and prophylaxis measures in the microregion of Rio Branco, especially those related to sanitary and reproductive management in the livestock breeding.