Prevalence and risk factors for bovine tuberculosis in the State of Mato Grosso do Sul, Brazil

Guedes, Israel Barbosa; Bottene, Ilda Francisca Neves; Monteiro, L.A.R.C.; Filho, Jamil Manoel Leal; Heinemann, Marcos Bryan; Amaku, Marcos; Grisi-Filho, José Henrique Hildebrand; Dias, Ricardo Augusto; Ferreira, Fernando; Telles, Evelise Oliveira; Gonçalves, Vı́tor Salvador Picão; Neto, José Soares Ferreira

doi:10.5433/1679-0359.2016v37n5supl2p3579

Cited by 35 publications

(48 citation statements)

References 22 publications

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“…Studies based on bovine tuberculosis, conducted in 12 Federative Units, which contain 75% of the Brazilian herd, showed herd prevalence estimates between 0.5% and 9.0% in Santa Catarina and São Paulo, respectively (BAHIENSE et al, 2016;BARBIERI et al, 2016;DIAS et al, 2016;GALVIS et al, 2016;GUEDES et al, 2016;LIMA et al, 2016;NÉSPOLI et al, 2016;QUEIROZ et al, 2016;ROCHA et al, 2016;SILVA et al, 2016;VELOSO et al, 2016;VENDRAME et al, 2016). The same authors observed that the risk of bovine tuberculosis increased in larger dairy cattle herds on farms that use some degree of automation in the dairy production process.…”

Section: Resultsmentioning

confidence: 51%

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

Ribeiro

Gonçalves

Francisco

et al. 2016

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Considering the implementation of the National Program for the Control and Eradication of Animal Brucellosis and Tuberculosis (PNCEBT) in 2001, and the need to determine the epidemiological status of animal tuberculosis for future evaluation of the effectiveness of the measures laid down, the objective of this study was to estimate the prevalence and identify risk factors of bovine tuberculosis in the Federal District (DF) of Brazil, as well as to provide an input for the strategic management of PNCEBT. Field testing and data collection was carried out from February to December 2003. The DF was considered a single epidemiological region owing to the small number of existing farms, and the absence of significant differences between the region's farming enterprises, which would justify the stratification of the regional sample. A total of 278 farms were randomly sampled from the local registry database of bovine farms with reproductive activity, in which 2,019 adult cows were tuberculin tested. Only one sampled animal had a positive result, using the comparative cervical tuberculin test, resulting in a bovine tuberculosis prevalence of 0.05% [95% CI: 0.0-0.4%]. The herd-level prevalence of bovine tuberculosis in the DF was estimated as 0.36% [95% CI: 0-2.0%]. The analysis of risk factors was impaired by the results obtained, as the number of cases did not allow for this kind of analysis. Cattle farming in the DF is predominantly aimed at dairy production; however, it is characterized by the presence of small low milk yield herds, which may not favor the introduction and persistency of infection of Mycobacterium bovis. Health authorities from the DF perform surveillance for bovine tuberculosis and maintain the need for tests for the movement of bovines for breeding and those animals destined for any form of animal gathering, especially auctions. Therefore, it is likely that the DF has good conditions for successfully implementing the PNCEBT. ResumoConsiderando a implantação do Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose Animal (PNCEBT) no ano de 2001 e a necessidade de se conhecer a situação epidemiológica local da tuberculose animal para uma posterior avaliação da eficácia das medidas estabelecidas, este trabalho teve como objetivo estimar a prevalência e identificar os fatores de risco para a tuberculose bovina no Distrito Federal, assim como, fornecer subsídios para a gestão estratégica do PNCETB. A colheita de dados foi realizada no período de fevereiro a dezembro de 2003. O DF foi considerado como uma única região epidemiológica devido ao número pequeno de propriedades existentes e pela ausência de diferenças importantes entre as regiões pecuárias que justificassem a estratificação regional da amostra. Foram amostradas aleatoriamente 278 propriedades do banco cadastral local de rebanhos bovinos com atividade reprodutiva, nas quais foram testadas 2019 fêmeas adultas. Somente um animal amostrado foi positivo ao Teste Cervical Comparativo, resultando numa prevalência de animais...

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Section: Resultsmentioning

confidence: 51%

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

Ribeiro

Gonçalves

Francisco

et al. 2016

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“…The prevalence of infected herds in these units varied between 0.36%, in the Federal District (Brasília), and 9.0%, in São Paulo (BAHIENSE et al, 2016;BARBIERI et al, 2016;DIAS et al, 2016;GALVIS et al, 2016;GUEDES et al, 2016;NÉSPOLI et al, 2016;QUEIROZ et al, 2016;RIBEIRO et al, 2016;ROCHA et al, 2016;SILVA et al, 2016;BAUMGARTEN et al, 2016;VENDRAME et al, 2016).…”

Section: Previous Studies Have Been Conducted In 12mentioning

confidence: 99%

Epidemiological situation of bovine tuberculosis in the State of Pernambuco, Brazil

Lima

Nascimento²,

Almeida³

et al. 2016

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The epidemiological situation of bovine tuberculosis was studied in the state of Pernambuco, Brazil. The state was divided into three regions, and a predetermined number of properties was randomly sampled in each region. In each property, females aged 24 months or older were randomly selected and subjected to the cervical comparative tuberculin test. Altogether, 5,728 animals from 906 properties were tested. In the evaluated properties, an epidemiological questionnaire was applied to identify risk factors related to bovine tuberculosis. The prevalence of infected herds and infected animals and in the state was 2.87% [1.82-4.50] and 0.62% [0.29-1.29], respectively. There was a predominance trend of infected herds in the properties located in the dry areas of Pernambuco, where most dairy properties are found. The risk factors related to the occurrence of positive herds were: presence of 18 or more cows in the herd, milking the cows two or three times a day, and sharing the grazing area. In conclusion, the prevalence of bovine tuberculosis in Pernambuco is low, and the best strategy to be adopted is the implementation of a surveillance system for detection and sanitation of infected herds, preferably by incorporating risk-based surveillance strategies. In addition, the State should implement an effective sanitary program to enable producers to test their animals for bovine tuberculosis before inserting them into the herds, as well as avoid sharing the grazing areas with properties that are not free of bovine tuberculosis. ResumoA situação epidemiológica da tuberculose bovina foi estudada no estado de Pernambuco. O estado foi dividido em três regiões e em cada uma delas foi aleatoriamente amostrado um número pré-estabelecido de propriedades. Dentro de cada propriedade, fêmeas com idade igual ou superior a 24 meses foram escolhidas aleatoriamente e submetidas ao teste Tuberculínico Cervical Comparativo. Ao todo foram testados 5.728 animais provenientes de 906 propriedades. Nas propriedades, foi aplicado um questionário epidemiológico para identificar fatores de risco associados à tuberculose bovina. A prevalência de focos no estado foi de 2,87% [1,82; 4,50] e a de animais 0,62% [0,29; 1,29]. Houve tendência de concentração de focos na região do Agreste do estado, caracterizada pelo predomínio de propriedades de leite. Os fatores de risco associados à condição de foco foram ter 18 ou mais vacas no rebanho, ordenhar as vacas 2 ou 3 vezes ao dia e compartilhar pastagem. Concluindo, o estado tem baixa prevalência de tuberculose bovina e a melhor estratégia a ser adotada é a implementação de sistema de vigilância para detecção e saneamento dos focos, de preferência incorporando elementos de vigilância baseada em risco. Além disso, o estado deve realizar uma sólida ação de educação sanitária para que seus produtores passem a testar os animais para tuberculose bovina antes de introduzi-los em seus plantéis e deixem de compartilhar pastagem com propriedades que não sejam livres de tuberculose bovina. Palavras-chave...

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“…In Brazil, recent studies carried out in 13 States, which hold 70% of the Brazilian cattle population, showed that the prevalence of tuberculosis infected herds varied between 0.36%, in the Federal District, and 7.6%, in the state of Espírito Santo (BAHIENSE et al, 2016;BARBIERI et al, 2016;GALVIS et al, 2016;GUEDES et al, 2016;LIMA et al, 2016;NÉSPOLI et al, 2016;QUEIROZ et al, 2016;RIBEIRO et al, 2016;ROCHA et al, 2016;VELOSO et al, 2016;VENDRAME et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Prevalence and risk factors for bovine tuberculosis in the State of São Paulo, Brazil

Dias¹,

Ulloa-Stanojlovic²,

Belchior³

et al. 2016

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A cross sectional study was carried out between May and November 2011 to investigate the epidemiological situation of bovine tuberculosis (bTB) in the state of São Paulo, Brazil. The state was divided into seven regions. Three hundred farms from each region, with reproductive activity, were randomly chosen and included as primary sample units. A fixed number of bovine females, older than 2 years of age, were randomly selected and tested, using the comparative cervical tuberculin test. An epidemiological questionnaire based survey was conducted in the selected farms. Our results show that in the state of São Paulo, the apparent prevalence of positive farms was 9% (95% confidence interval, 95% CI = 7.8 -10.5%). The prevalence in the individual regions varied between 3.5% (95% CI = 1.7 -6.8%) and 13.9% (95% CI = 10.2 -18.8%). The apparent prevalence of positive animals in the state was 1.3% (95% CI = 0.9 -1.7%) and varied from 0.3% (95% CI = 0.2 -0.6%) to 2.5% (95% CI = 1.4 -4.5%) in the regions. The risk factors associated with tuberculosis in the state were (i) number of adult females in a herd is ≥ 24 (Odds ratio, OR = 1.91, 95% CI = 1.32 -2.75), (ii) type of farm enterprise (dairy: OR = 2.70, 95% CI = 1.40 -5.21; mixed: OR = 2.03, 95% CI = 1.08 -3.82), (iii) milking process (milking parlor: OR = 4.12, 95% CI = 1.46 -11.64; portable milking machine: OR = 2.94, 95% CI = 1.42 -6.09), and (iv) pasture sharing (OR = 1.58, 95% CI = 1.07 -2.33). The state of São Paulo should implement a structured surveillance system to detect and mitigate the disease. Further, an efficient animal health education program, which encourages the farmers to test replacement animals for bTB prior to introduction in their herds and to avoid pasture sharing with farms of unknown sanitary conditions should also be implemented. ResumoUm estudo transversal foi realizado entre maio e novembro de 2011 para determinar a situação epidemiológica da tuberculose bovina (bTB) no estado de São Paulo, Brasil. O estado foi dividido em sete regiões. Trezentas propriedades com atividade reprodutiva de bovinos de cada região foram aleatoriamente selecionadas e consideradas unidades primárias de amostragem. Um número fixo de fêmeas bovinas com idade superior a dois anos foram aleatoriamente selecionadas e testadas usando o teste cervical comparativo. Um inquérito epidemiológico, utilizando um questionário específico, foi realizado em cada propriedade selecionada. Os nossos resultados indicam que no estado de São Paulo, a prevalência aparente de propriedades positiva foi de 9% (intervalo de confiança de 95%, IC95% = 7,8 -10,5%). A prevalência nas diferentes regiões variou entre 3,5% (IC95% = 1,7 -6,8%) e 13,9% (IC95% = 10,2 -18,8%). A prevalência aparente de animais positivos no estado foi 1,3% (IC95% = 0,9 -1,7%) e variou de 0,3% (IC95% = 0,2 -0,6%) até 2,5% (IC95% = 1,4 -4,5%) nas regiões. Os fatores de risco associados à tuberculose no estado foram (i) número de fêmeas adultas nos rebanhos ≥ 24 (Odds ratio, OR = 1,91, IC95% = 1,32 -2,75), (ii) tip...

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Prevalence and risk factors for bovine tuberculosis in the State of Mato Grosso do Sul, Brazil

Cited by 35 publications

References 22 publications

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

Epidemiological situation of bovine tuberculosis in the State of Pernambuco, Brazil

Prevalence and risk factors for bovine tuberculosis in the State of São Paulo, Brazil

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