Epidemiological status of bovine tuberculosis in the State of Rio Grande do Sul, Brazil

Queiroz, Mariana Ramos; Groff, Ana Cláudia Mello; Silva, Nariléia Dos Santos; Grisi-Filho, José Henrique Hildebrand; Amaku, Marcos; Dias, Ricardo Augusto; Telles, Evelise Oliveira; Heinemann, Marcos Bryan; Neto, José Soares Ferreira; Gonçalves, Vı́tor Salvador Picão; Ferreira, Fernando

doi:10.5433/1679-0359.2016v37n5supl2p3647

Cited by 42 publications

(65 citation statements)

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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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“…Dairy herds were also found to have a higher risk of tuberculosis in New Zealand (PORPHYRE et al, 2008) and the United Kingdom (RAMÍREZ-VILLAESCUSA et al, 2010;KAROLEMEAS et al, 2011). In Brazil, this association was previously detected in the states of Bahia, Goiás, Mato Grosso, Minas Gerais, Paraná, Rio Grande do Sul, Santa Catarina, and São Paulo (BAHIENSE et al, 2016;ROCHA et al, 2016;NÉSPOLI et al, 2016;BARBIERI et al, 2016;SILVA et al, 2016;QUEIROZ et al, 2016;BAUMGARTEN et al, 2016;DIAS et al, 2016). Moreover, animals from dairy herds tend to be older than animals from beef herds, therefore having a higher likelihood of exposure to the infectious agent (HUMBLET et al, 2009).…”

Section: Discussionmentioning

confidence: 81%

“…This prevalence of infected herds is equal to those observed in the states of Bahia, Paraná, Rio Grande do Sul, Mato Grosso, Rondônia, Goiás, Pernambuco, and Distrito Federal. It exceeds the prevalence of infected herds in the State of Santa Catarina and is lower than those observed in São Paulo, Minas Gerais, and Espírito Santo (BAHIENSE et al, 2016;BARBIERI et al, 2016;DIAS et al, 2016;GALVIS et al, 2016;LIMA 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: Discussionmentioning

confidence: 93%

“…Studies conducted on bovine tuberculosis in 12 Federative Units, which account for 66% of the Brazilian herd, showed prevalence of infected herds ranging from 0.36% in the Distrito Federal to 9.0% in São Paulo (BAHIENSE et al, 2016;BARBIERI et al, 2016;DIAS et al, 2016;GALVIS et al, 2016;LIMA 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 Azambuja (2010) found that 12% (24/200) of bovines tested positive for the intradermal comparative cervical tuberculin diagnostic test in the milk basin of Caarapó, a municipality located in the center of the Southern Plateau region of the State. In contrast, Piva Filho (2013), using the same diagnostic test, found a rate of positive-testing animals of 0.26% in the municipality of Parnaíba (MS).…”

Section: Introductionmentioning

confidence: 99%

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

Guedes

Bottene

Monteiro

et al. 2016

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The objective of this study was to describe the epidemiological situation of bovine tuberculosis in Mato Grosso do Sul. The State was divided into three regions, Pantanal, Planalto Norte, and Planalto Sul. In each region, properties were randomly chosen and a pre-established number of animals were also randomly selected; these animals were submitted to the intradermal comparative cervical tuberculin diagnostic test. In total, 17,121 animals from 938 properties were tested. In cases of inconclusive results, the animals were retested with the same diagnostic procedure within a minimum interval of 60 days. An epidemiological questionnaire was administered in the properties sampled to investigate possible risk factors for the disease. In the State, the prevalence of infected herds was 1.3% (95% confidence interval [CI]: 0.72-2.37%) and that of infected animals was 0.035% (95% CI: 0.017-0.069%). Point estimates indicated a higher concentration of infected herds (2.61%; 95% CI: 1.31-5.15%) and infected animals (0.132%; 95% CI: 0.055-0.315%) in the Planalto Sul region, which has a predominance of dairy properties. The prevalence of herds infected with bovine tuberculosis was found to be associated with the production of milk, with technification in the mode of production represented by the use of mechanical milking. Thus, it is recommended that the State adopt strategies for the eradication of bovine tuberculosis, with the structuring of the surveillance system for detection and mitigation of infected herds, incorporating risk-based surveillance elements. ResumoO objetivo do presente estudo foi descrever a situação epidemiológica da tuberculose bovina no Mato Grosso do Sul. O estado foi dividido em três regiões, Pantanal, Planalto Norte e Planalto Sul. Em cada região, propriedades foram sorteadas aleatoriamente e, dentro dessas, selecionou-se também de forma aleatória um número pré-estabelecido de animais, os quais foram submetidos ao teste Tuberculínico Cervical Comparativo. No total, foram testados 17.121 animais, provenientes de 938 propriedades. Os animais que resultaram inconclusivos foram retestados com o mesmo procedimento diagnóstico em intervalo mínimo de 60 dias. Nas propriedades amostradas foi aplicado um questionário epidemiológico para averiguar possíveis fatores de risco para a enfermidade. No estado, a prevalência de focos foi de 1,3% [0,72; 2,37%] e a de animais 0,035% [0,017; 0,069%]. As estimativas pontuais indicaram uma maior concentração de focos (2,61% [1,31; 5,15%]) e de animais (0,132% [0,055; 0,315%]) na região Planalto Sul, que tem predomínio de propriedades leiteiras. Verificou-se que a condição do foco de tuberculose bovina está associada à produção de leite, com sofisticação no modo de produção representado pela utilização de ordenha mecânica. Assim, recomenda-se que o estado adote estratégias de erradicação, com a estruturação de sistema de vigilância para detecção e saneamento de focos, incorporando elementos de vigilância baseada em risco. Palavras-chave: Brasil. Fatores de risco...

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“…The extensive and systematic employment of milk pasteurization has significantly reduced the incidence of these diseases in the human population (SINHA, 1994). However, in countries such as Brazil, where these diseases are still currently widespread in herds (BRASIL, 2006a) and the consumption of dairy products prepared with raw milk persists (SOUSA, 2005; ROCHA et al, 2014), it is reasonable to accept the occurrence of human cases by this route of transmission, despite the lack of Brazilian epidemiological data corroborating this hypothesis.A recent study carried out in 13 Brazilian states, which hold 75% of the country cattle population, showed the prevalence of tuberculosis infected herds ranging from 0.36% in the Federal District to 9.0% in São Paulo (BAHIENSE et al, 2016;BARBIERI et al, 2016;DIAS et al, 2016b;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;SILVA et al, 2016a;VELOSO et al, 2016;VENDRAME et al, 2016). In relation to bovine brucellosis, 18 Brazilian states were recently studied, comprising 85% of the country cattle population, and the prevalence ranged from 0.91% in Santa Catarina to 30.6% in Mato Grosso do Sul ALVES et al, 2009;ANZAI et al, 2016;BARDDAL et al, 2016;BAUMGARTEN et al, 2016; BORBA et al, 2013; CLEMENTINO et al., 2016;DIAS et al, 2009;DIAS et al, 2016a;INLAMEA et al, 2016;KLEIN-GUNNEWIEK et al, 2009;LEAL FILHO et al, 2016;OGATA et al, 2009;OLIVEIRA et al, 2016;ROCHA et al, 2009; SILVA et al, 2016b;SILVA et al, 2009).…”

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Decline in Mycobacterium bovis and Brucella abortus populations during the maturation of experimentally contaminated parmesan-type cheese

Starikoff

Fontanesi

Maciel

et al. 2016

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Decline in Mycobacterium bovis AbstractBrazilian legislation allows the manufacture of raw milk cheese with a maturation exceeding 60 days at room temperature above 5°C, but there is a lack of solid scientific evidence on the efficacy of this maturation process in inactivating important pathogens that may be present in milk, such as Mycobacterium bovis and Brucella abortus. Thus, the objectives of this study were to produce parmesantype cheese experimentally contaminated with M. bovis and B. abortus and evaluate the survival of these pathogens along 2-month maturation. Parmesan-type cheese was manufactured in the laboratory using whole pasteurized milk with or without inoculation with M. bovis (SB1033) or B. abortus (1119-3) and matured at 18°C for up to 63 days. M. bovis was inoculated in Stonebrink-Leslie medium supplemented with antibiotics and incubated at 37°C for 45 days, and B. abortus was incubated in Farrel medium at 36°C for 3 days. The average D 18°C value, weighted by variance, was 37.5 ± 5.3 days for M. bovis and 5.9 ± 0.7 days for B. abortus. The average physicochemical parameters in the cheese at the end of the study were as follows: pH = 4.89, water activity = 0.976, and moisture percentage = 43.1%. The pH might have contributed to the reduction in the population of B. abortus but seems not to have significantly influenced the population of M. bovis. We conclude that the duration of the maturation process influences the size of the surviving populations of M. bovis and B. abortus, and that the shortening of the maturation duration might not ensure a decline in pathogen levels to safe levels. Thus, complementary studies considering the effect of several other technological aspects on the survival of these pathogens are required, including the effect of the lactic acid bacterial population, salt content, and temperature of maturation. ResumoA legislação brasileira permite a fabricação queijos de leite cru com maturação superior a 60 dias em temperatura acima de 5°C, mas falta evidência científica sólida sobre a eficácia do processo de maturação na inativação de importantes patógenos que podem estar presentes no leite, como o Mycobacterium bovis e a Brucella abortus. Assim, os objetivos desse estudo foram produzir o queijo tipo parmesão experimentalmente contaminado com M. bovis e B. abortus e avaliar a sobrevivência desses patógenos ao longo de 2 meses de maturação. Queijo do tipo parmesão foi fabricado em laboratório com leite pasteurizado integral com ou sem inoculo de M. bovis (SB1033) ou B. abortus (1119-3) e maturado a 18°C por até 63 dias. M. bovis foi semeado em meio Stonebrink-Leslie, acrescido de antibióticos, e incubado a 37°C por 45 dias e a B. abortus foi semeada em meio Farrel a 36°C por 3 dias. O valor D 18°C médio, ponderado pela variância, foi de 37,5 ± 5,3 dias para o M. bovis e de 5,9 ± 0,7 dias para a B. abortus. Os parâmetros físico-químicos médios do queijo no final do estudo foram como se segue: pH = 4,89, atividade de água = 0,976 e umidade percentual = 43,1%. O pH pode ter ...

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Epidemiological status of bovine tuberculosis in the State of Rio Grande do Sul, Brazil

Cited by 42 publications

References 25 publications

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

Epidemiological status of bovine tuberculosis in the Federal District of Brazil

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

Decline in Mycobacterium bovis and Brucella abortus populations during the maturation of experimentally contaminated parmesan-type cheese

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