Prevalence and herd-level risk factors of bovine tuberculosis in the State of Goiás, Brazil

Authors

  • Willian Vilela Rocha Agência Goiana de Defesa Agropecuária
  • Valéria de Sá Jayme Universidade Federal de Goiás
  • Ana Lourdes Arrais de Alencar Mota Universidade de Brasília
  • Wilia Marta Elsner Diederichsen de Brito Universidade Federal de Goiás
  • Glauciane Ribeiro de Castro Pires Agência Goiana de Defesa Agropecuária
  • José Soares Ferreira Neto Universidade de São Paulo
  • José Henrique Hildebrand Grisi-Filho Universidade de São Paulo
  • Ricardo Augusto Dias Universidade de São Paulo
  • Marcos Amaku Universidade de São Paulo
  • Evelise Oliveira Telles Universidade de São Paulo
  • Fernando Ferreira Universidade de São Paulo
  • Marcos Bryan Heinemann Universidade de São Paulo
  • Vítor Salvador Picão Gonçalves Faculdade de Agronomia e Medicina Veterinária

DOI:

https://doi.org/10.5433/1679-0359.2016v37n5Supl2p3625

Keywords:

Cattle, Mycobacterium bovis, Prevalence, Risk factors, Goiás.

Abstract

Bovine tuberculosis results in economic losses in livestock production and poses a risk to public health. This study aimed to characterize the epidemiological status of bovine tuberculosis in adult cows in the state of Goiás, Brazil. The state was divided into three sampling strata, corresponding to different livestock production circuits. A total of 18,659 animals were tested with the comparative cervical tuberculin test (CCT), in 300 randomly sampled bovine herds per stratum. An epidemiological questionnaire was used to identify health and management practices that may be associated with the presence of tuberculosis infection in the herd. In Stratum 1, dominated by beef cattle, no animals reacted to the CCT. In Stratum 2, which covers the main dairy regions of the state, the prevalence was estimated at 8.67% [5.73 to 12.74%] for herds and at 0.9% [0.21 to 1.58%] for animals. In Stratum 3, characterized by a mix of dairy, beef and dual-purpose herds, the prevalence was estimated at 1.00% [0.21 to 2.89] for herds and 0.30% [0.10 to 0.49 %] for animals. The overall prevalence in the state of Goiás was 3.43% [2.20 to 4.67%] for herds and 0.30% [0.10 to 0.49%] for animals. The multiple logistic regression analysis revealed that herd-level risk factors associated with the presence of the bovine tuberculosis are: the location of the herd in Stratum 2 (OR = 12.05 [3.52 to 41.28]) and the number of times a cow is milked per day (OR = 6.27 [2.72 to 14.44]). Regular veterinary care was identified as a protective factor (OR = 0.38 [0.15-0.94]). These results indicate that bovine tuberculosis is endemic in the state; its spatial distribution is heterogeneous with a strong concentration in dairy regions. The most intensive dairy farms are those with the highest risk, which is consistent with what other authors’ found elsewhere in Brazil. The epidemiological information generated by this study provides information for planning of risk-based surveillance actions, and justifies the adoption of free-herd certification programs for bovine tuberculosis in the main dairy regions of Goiás.

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Author Biographies

Willian Vilela Rocha, Agência Goiana de Defesa Agropecuária

Médico Veterinário, Agência Goiana de Defesa Agropecuária, Goiânia Brasil.

Valéria de Sá Jayme, Universidade Federal de Goiás

Prof., Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, UFG, Goiânia, Brasil.

Ana Lourdes Arrais de Alencar Mota, Universidade de Brasília

Médica Veterinária, Drª em Saúde Anima, Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, UnB, Brasília, DF, Brasil.

Wilia Marta Elsner Diederichsen de Brito, Universidade Federal de Goiás

Prof., Escola de Veterinária e Zootecnia, Universidade Federal de Goiás, UFG, Goiânia, Brasil.

Glauciane Ribeiro de Castro Pires, Agência Goiana de Defesa Agropecuária

Médica Veterinária, Agência Goiana de Defesa Agropecuária, Goiânia Brasil.

José Soares Ferreira Neto, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

José Henrique Hildebrand Grisi-Filho, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Ricardo Augusto Dias, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Marcos Amaku, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Evelise Oliveira Telles, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Fernando Ferreira, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Marcos Bryan Heinemann, Universidade de São Paulo

Prof., Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, USP, São Paulo, SP, Brasil.

Vítor Salvador Picão Gonçalves, Faculdade de Agronomia e Medicina Veterinária

Prof., Faculdade de Agronomia e Medicina Veterinária, UnB, Brasília, DF, Brasil.

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Published

2016-11-09

How to Cite

Rocha, W. V., Jayme, V. de S., Mota, A. L. A. de A., Brito, W. M. E. D. de, Pires, G. R. de C., Ferreira Neto, J. S., … Gonçalves, V. S. P. (2016). Prevalence and herd-level risk factors of bovine tuberculosis in the State of Goiás, Brazil. Semina: Ciências Agrárias, 37(5Supl2), 3625–3638. https://doi.org/10.5433/1679-0359.2016v37n5Supl2p3625

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Articles