Situação epidemiológica da brucelose bovina no Estado de São Paulo

Dias, Ricardo Augusto; Gonçalves, Vı́tor Salvador Picão; Figueiredo, V.C.F.; Lobo, José; Lima, Zélia Marilia Barbosa; Paulin, L.; Gunnewiek, Mônica Fagundes de Carvalho Klein; Amaku, Marcos; Neto, José Soares Ferreira; Ferreira, Fernando

doi:10.1590/s0102-09352009000700015

Cited by 48 publications

(49 citation statements)

References 2 publications

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“…Those herds with multiple serological reactors (positives and questionables. Similar findings were also reported in the Brazilian states of Mato Grosso, Mato Grosso do Sul, Rio de Janeiro, Sergipe, Tocantins and in a previous study carried out in São Paulo in 2001 (CHATE et al, 2009;DIAS et al, 2009b;KLEIN-GUNNEWIEK et al, 2009;NEGREIROS et al, 2009;OGATA et al, 2009;SILVA et al, 2009). Some characteristics of the larger herds may facilitate the transmission of brucellosis, especially the higher frequency of animal replacement, difficulty in implementing disease control measures, and the dynamics of the disease itself (CRAWFORD et al, 1990).…”

Section: Resultssupporting

confidence: 88%

“…The prevalence of brucellosis infected herds varied from 0.32% in the state of Santa Catarina to 41.5% in the state of Mato Grosso do Sul (ALVES et al, 2009;AZEVEDO et al, 2009;BORBA et al, 2013;CHATE et al, 2009;DIAS et al, 2009aDIAS et al, , 2009bGONÇALVES et al, 2009aGONÇALVES et al, , 2009bKLEIN-GUNNEWIEK et al, 2009;MARVULO et al, 2009;NEGREIROS et al, 2009;OGATA et al, 2009;ROCHA et al, 2009;SIKUSAWA et al, 2009;SILVA et al, 2009;VILLAR et al, 2009;ALMEIDA et al, 2016;CLEMENTINO et al, 2016). The states of Santa Catarina, São Paulo, Minas Gerais, Rondônia, Mato Grosso, Mato Grosso do Sul, and Rio Grande do Sul carried out a second study on the prevalence of brucellosis.…”

Section: Introductionmentioning

confidence: 99%

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An update on the epidemiologic situation of bovine brucellosis in the State of Espírito Santo, Brazil

Anzai

Costa²,

Said

et al. 2016

SCA

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A cross-sectional study was carried out between January 2012 and May 2014 to estimate the prevalence of bovine brucellosis in the state of Espírito Santo, Brazil. This study was carried out 11 years after the implementation of the immunization program for heifers with a vaccine derived from the S19 strain of Brucella abortus. The state was divided into two regions. Three hundred farms from each region, with reproductive activity, were randomly chosen and included as primary sample units. A fixed number of cows were randomly selected and tested for antibodies against Brucella spp. A farm was considered to be infected when at least one female tested positive for Brucella spp. In the selected farms, an epidemiological questionnaire based survey, focused on herd traits as well as husbandry and sanitary practices, was conducted, to evaluate the factors associated with the risk of infection. The overall prevalence of infected herds was 9.3% (95% confidence interval, 95% CI = 7.1-11.8%), varying from 8.7% (95% CI = 5.7-12.6%) in region 2 to 9.7% (95% CI = 6.8-13.4%) in region 1. There was no significant difference in the prevalence between the regions. The apparent prevalence of Brucella spp. positive farms across the regions and the state was similar to the prevalence observed 11 years earlier.The prevalence of positive animals was 3.8% (95% CI = 0.9-10.1%), varying from 1.5% (95% CI = 0.8-2.4%) in region 1 to 7.9% (95% CI = 1.9-20.3%) in region 2, without a significant difference between the regions. There was no difference in the number of Brucella spp. positive animals after 11 years of the immunization program. The risk factors associated with brucellosis were (i) more than 10 cows per herd (OR = 5.0; 95% CI =2.5-11.1) and (ii) equipment, feedstock, or personnel sharing (OR = 2.2; 95% CI = 1.1-4.2). The state of Espírito Santo should seek systematic vaccination coverage targeting more than 80% of the eligible heifers. An efficient animal health program, which educates the farmers to test replacement animals for brucellosis before introducing them to their herds, to avoid equipment, personnel or feedstock sharing with farms of unknown sanitary conditions, and to increase awareness of the importance of good sanitary procedures during artificial insemination, should be implemented. Anzai, E. K. et al. ResumoPara estimar a prevalência e os fatores de risco da brucelose bovina no Estado do Espírito Santo (Brasil), foi realizado um estudo transversal entre janeiro de 2012 e maio de 2014. Esse estudo foi realizado 11 anos após a implementação de um programa de imunização em novilhas utilizando uma vacina derivada da estirpe S19 de Brucella abortus. O estado foi dividido em duas regiões. Trezentas propriedades com atividade reprodutiva foram aleatoriamente selecionadas em cada região e incluídas como unidades primárias de amostragem. Um número fixo de fêmeas adultas foi aleatoriamente selecionado em cada propriedade. Os animais foram testados para anticorpos contra Brucella spp. Um questionário epidemiológico foi ...

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

An update on the epidemiologic situation of bovine brucellosis in the State of Espírito Santo, Brazil

Anzai

Costa²,

Said

et al. 2016

SCA

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“…In Brazil, this association was also observed in the states of Rio de Janeiro, Sergipe, Tocantins, São Paulo, Mato Grosso do Sul and Mato Grosso (CHATE et al, 2009;DIAS et al, 2009b;KLEIN-GUNNEWIEK et al, 2009;OGATA et al, 2009;NEGREIROS et al, 2009;SILVA et al, 2009). Furthermore, this association was also noted by numerous international authors (KELLAR et al, 1976;NICOLETTI, 1980;SALMAN;MEYER, 1984).…”

Section: Discussionmentioning

confidence: 84%

“…Thus, in order to establish rational strategies for combating bovine brucellosis, its epidemiological status was studied in 18 Federative Units, which revealed that the prevalence of infected herds ranged from 0.32% in Santa Catarina to 41.5% in Mato Grosso do Sul (ALMEIDA et al, 2016;ALVES et al, 2009;AZEVEDO et al, 2009;BORBA et al, 2013;SIKUSAWA et al, 2009;CHATE et al, 2009;CLEMENTINO et al, 2016;DIAS et al, 2009aDIAS et al, , 2009bGONÇALVES et al, 2009aGONÇALVES et al, , 2009bKLEIN-GUNNEWIEK et al, 2009;MARVULO et al, 2009;NEGREIROS et al, 2009;OGATA et al, 2009;ROCHA et al, 2009;SILVA et al, 2009;VILLAR et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Effect of vaccination in lowering bovine brucellosis in the State of Rondônia, Brazil

Inlamea

Rocha²,

Ferreira

et al. 2016

SCA

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The study was carried out to evaluate the effectiveness of the vaccination program against bovine brucellosis, implemented by the State of Rondônia, using prevalence rates as an indicator. The State was divided into three regions. For each region, a pre-determined number of herds were selected and at each herds, blood samples were collected from randomly chosen females with 24 months age or more. Sera from animals were submitted to a serial testing protocol, with screening performed using the buffered acidified antigen test and confirmation by the complement fixation test. A epidemiological questionnaire was administered to each farm property to identify the risk factors associated with the disease. The prevalence rates of infected herds and infected animal at the state were 12.3% [10.3-14.6] and was 1.9% [1.4-2.5], respectively. Between the regions, the prevalence of infected herds varied from 11.6% to 12.8% and the prevalence of infected animals ranged between 1.4% and 2.6%. Bovine brucellosis in Rondônia State is associated with the beef herd, a larger number of cows and the presence of flooded pastures. There was an important reduction in prevalence rates of infected herds and infected animals since 2004, however further reduction could still be achieved with vaccination. Thus, the State should continue its vaccination program, placing emphasis on ensuring the quality of the process. In addition, it should also promote the use of a vaccine that does not induce antibody formation. Additionally, the State must carry out a great effort of education so that producers test breeding animals for brucellosis before introducing them onto their properties and, where possible, prevent calved cows from having access to areas that are flooded. Key words: Bovine brucellosis. Vaccination. Prevalence. Risk factors. Rondônia. Brazil. ResumoO estudo foi realizado para se verificar a eficácia do programa de vacinação contra brucelose bovina implementado pelo estado de Rondônia, utilizando-se a prevalência como indicador. O Estado

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“…Até o momento, os inquéritos foram conduzidos em 15 Estados, e as prevalências de animais soropositivos variaram de 0,06%, em Santa Catarina, a 10,2%, em Mato Grosso (alveS et al, 2009;azevedo et al, 2009;chate et al, 2009;diaS et al, 2009a;diaS et al, 2009b;gonçalveS et al, 2009a;gonçalveS et al, 2009b;Klein-gunnewieK et al, 2009;Marvulo et al, 2009;negreiroS et al, 2009;ogata et al, 2009;rocha et al, 2009;SiKuSawa et al, 2009;Silva et al, 2009;villar et al, 2009 …”

Section: Introductionunclassified

Brucelose bovina no Estado de Roraima: estudo retrospectivo

et al. 2012

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RESUMOO objetivo do presente trabalho foi determinar a frequência de propriedades positivas (focos) e de fêmeas bovinas soropositivas para a brucelose no Estado de Roraima, bem como identificar fatores de risco. Foram utilizados dados da Agência de Defesa Agropecuária do Estado de Roraima (ADERR), coletados de suas quatro microrregiões, durante o período de janeiro de 2007 a julho de 2009. Durante esse período, foram examinadas 387 propriedades, e 9.087 soros de fêmeas bovinas com idade ≥ 24 meses foram submetidos ao diagnóstico sorológico da brucelose. Para a análise de fatores de risco, foi utilizada a regressão logística múltipla. Uma propriedade foi considerada foco quando apresentou pelo menos um animal soropositivo. Das propriedades investigadas, 106 (27,4%) apresentaram pelo menos um animal soropositivo e, dos animais analisados, 369 (4,1%) foram soropositivos. Os fatores de risco identificados foram: possuir mais de 51 animais no rebanho (odds ratio = 1,87; p = 0,015) e alugar pasto (odds ratio = 2,20; p = 0,003). Sugere-se que esforços sejam concentrados na intensificação da vacinação de bezerras no Estado de Roraima com o intuito de que seja alcançada uma prevalência compatível com as ações de teste e sacrifício de animais. PALAVRAS-CHAVE: Brucella abortus, bovino, frequência, fatores de risco, epidemiologia (controle).ABSTRACT BOVINE BRUCELLOSIS IN RORAIMA STATE: RETROSPECTIVE STUDY. The aim of this study was to determine the frequency of positive herds (foci) and seropositive bovine females for brucellosis in the state of Roraima, Northern region of Brazil, as well as to identify risk factors. Data from the Agency of Agricultural Protection in the state, collected from its four microregions during the January 2007 to July 2009 period, were used. During this period, 387 herds were examined, and 9,087 adult bovine female sera were submitted to the serological diagnosis of brucellosis. For risk factor analysis the multiple logistic regression was used. A herd was considered focus when presented at least one seropositive animal. Of the herds investigated, 106 (27.4%) had at least one seropositive animal, and of the animals examined, 369 (4.1%) were seropositive. Risk factors identified were: herd size larger than 51 animals (odds ratio = 1.87; p = 0.015) and pasture rental (odds ratio = 2.20; p = 0.003). It is suggested that efforts must be concentrated on the intensification of heifer vaccination in the State of Roraima in order to reach a prevalence value compatible with actions of test and sacrifice of animals.

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Situação epidemiológica da brucelose bovina no Estado de São Paulo

Cited by 48 publications

References 2 publications

An update on the epidemiologic situation of bovine brucellosis in the State of Espírito Santo, Brazil

An update on the epidemiologic situation of bovine brucellosis in the State of Espírito Santo, Brazil

Effect of vaccination in lowering bovine brucellosis in the State of Rondônia, Brazil

Brucelose bovina no Estado de Roraima: estudo retrospectivo

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