Prevalence and herd-level risk factors for bovine tuberculosis in the State of Paraná, Brazil
Maria do Carmo Pessôa Silva,Vitor Salvador Picão Gonçalves,Ana Lourdes Arrais de Alencar Mota,Mariza Koloda,José Soares Ferreira Neto,José Henrique Hildebrand Grisi-Filho,Ricardo Augusto Dias,Marcos Amaku,Evelise Oliveira Telles,Fernando Ferreira,Marcos Bryan Heinemann,Amauri Alcindo Alfieri,Ernst Eckehardt Müller +12 more
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TLDR
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 Goias.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 Goias, 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 Goias 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 Goias.read more
Citations
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Prevalence and herd-level risk factors of bovine tuberculosis in the State of Santa Catarina
Flávio Pereira Veloso,Karina Diniz Baumgarten,Ana Lourdes Arrais de Alencar Mota,Fernando Ferreira,José Soares Ferreira Neto,José Henrique Hildebrand Grisi-Filho,Ricardo Augusto Dias,Marcos Amaku,Evelise Oliveira Telles,Vitor Salvador Picão Gonçalves +9 more
TL;DR: The results suggest that dairy herds, in which animals are kept in partial or total confinement, and larger herds, which tend to acquire animals more often, are at a higher risk of bovine TB.
Epidemiological status of bovine tuberculosis in the state of Rio Grande do Sul, Brazil Situação epidemiológica da tuberculose bovina no Estado do Rio Grande do Sul, Brasil
Mariana Ramos Queiroz,Ana Cláudia,Mello Groff,José Henrique Hildebrand Grisi-Filho,Marcos Amaku,Ricardo Augusto Dias,Evelise Oliveira Telles,Marcos Bryan Heinemann,José Soares Ferreira Neto,Vitor Salvador,Picão Gonçalves,Fernando Ferreira +11 more
TL;DR: In this article, a study was conducted to determine the epidemiological status of bovine tuberculosis in the state of Rio Grande do Sul in Brazil, where cows with age equal to or greater than 24 months were selected at random and submitted to the comparative cervical tuberculin test.
Journal ArticleDOI
Epidemiologic characterization of bovine tuberculosis in the State of Espírito Santo, Brazil
Jason Ardila Galvis,José Henrique Hildebrand Grisi-Filho,Daniele da Costa,Alba Luisa Pereira Ribeiro Said,Marcos Amaku,Ricardo Augusto Dias,Fernando Ferreira,Vitor Salvador Picão Gonçalves,Marcos Bryan Heinemann,Evelise Oliveira Telles,José Soares Ferreira Neto +10 more
TL;DR: The state of Espirito Santo should set up a surveillance system to detect and control bovine tuberculosis, taking into account the importance of dairy farms and animal trade in the state.
Epidemiologic characterization of bovine tuberculosis in the State of Rondônia, Brazil Caracterização epidemiológica da tuberculose bovina no Estado de Rondônia, Brasil
Fabiano Benitez Vendrame,Marcos Amaku,Fernando Ferreira,Evelise Oliveira,José Henrique,Hildebrand Grisi-Filho,Vitor Salvador,Marcos Bryan Heinemann,José Soares Ferreira Neto,Ricardo Augusto Dias +9 more
TL;DR: The State of Rondonia should implement a surveillance system to detect b TB-infected herds to certify them as bTB-free and an efficient health education program to inform farmers to test replacement animals for bTB prior to introduction in their herds should also be implemented.
Analysis of 15 years of the National Program for the Control and Eradication of Animal Brucellosis and Tuberculosis, Brazil Avaliação de 15 anos do Programa Nacional de Controle e Erradicação da Brucelose e Tuberculose, Brasil
José Soares Ferreira Neto,Gabriela Bicca da Silveira,Barbara Medeiros Rosa,Vitor Salvador,Picão Gonçalves,José Henrique Hildebrand Grisi-Filho,Marcos Amaku,Ricardo Augusto Dias,Fernando Ferreira,Marcos Bryan Heinemann,Evelise Oliveira Telles,Andrey Pereira Lage +11 more
TL;DR: Progress has been limited by the difficulty in engaging the beef and dairy productive chains as true partners in the process, and a large volume of high-quality epidemiological data were produced, which will allow the country to move forward more rationally and safely in combating these two diseases.
References
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Book
Veterinary Epidemiologic Research
TL;DR: Some of the lines in some of the Figures are printed very faintly (and in some cases are almost invisible), which was a surprise as the Figures had all printed perfectly well when the galley proofs were examined.
Journal ArticleDOI
Classification of worldwide bovine tuberculosis risk factors in cattle: a stratified approach
TL;DR: The main risk factors for bTB in cattle based on a three-level classification: animal, herd and region/country level are reviewed.
Journal ArticleDOI
Evaluating the health status of herds based on tests applied to individuals
TL;DR: Herd sensitivity can be increased by using a test that is less than 100% specific, and herd apparent prevalence increases directly with the number of animals tested, but the herd positive predictive value decreases.
Journal ArticleDOI
Husbandry practices, badger sett density and habitat composition as risk factors for transient and persistent bovine tuberculosis on UK cattle farms.
L. A. Reilly,Orin Courtenay +1 more
TL;DR: In these analyses, the covariates log herd size and tuberculin testing interval were significant predictors of both transient and persistent breakdown, whereas active badger sett density and regional location only affected the risk of persistent breakdown.
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