Author:
Silva Maria Do Carmo Pessôa,Gonçalves Vítor Salvador Picão,Mota Ana Lourdes Arrais de Alencar,Koloda Mariza,Ferreira Neto José Soares,Grisi-Filho José Henrique Hildebrand,Dias Ricardo Augusto,Amaku Marcos,Telles Evelise Oliveira,Ferreira Fernando,Heinemann Marcos Bryan,Alfieri Amauri Alcindo,Muller Ernst Eckehardt
Abstract
Bovine tuberculosis is a zoonosis with worldwide distribution. Its control has a direct impact on public health and livestock production. This study estimated the prevalence of infected herds and adult bovines and evaluated risk factors associated with the presence of tuberculosis within herds in the state of Paraná. The state was divided in seven livestock regions and independent sampling was performed. A total of 1,419 farms were sampled and 16,045 animals were tested using the intradermal comparative cervical tuberculin diagnostic test. The apparent and estimated prevalence rates in farms and adult bovine animals were 2.15% (95% CI: 1.31-3.00) and 0.42% (95% CI: 0.04-0.81), respectively. It was not possible to state with 95% confidence that the disease prevalence in any region was significantly different from that in other regions. There were no positive animals in the western region, and the prevalence of positive herds and animals in the other regions ranged from 1.03% to 3.89% and 0.17% to 1.08%, respectively. The logistic regression model identified larger herd size (OR = 2.4) and mechanical cmilking (OR = 5.18) as risk factors associated with the presence of bovine tuberculosis. The combination of low prevalence with risk factors associated to larger herds and more intensive dairy farming, renders the state of Paraná a good candidate for the implementation of industry-based free-herd accreditation schemes and makes a case for planning risk-based surveillance targeted at major dairy basins.
Publisher
Universidade Estadual de Londrina
Subject
General Agricultural and Biological Sciences
Cited by
29 articles.
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