RESUMOCaracterizou-se a brucelose bovina em Mato Grosso por meio de um estudo transversal realizado em 2003 para auxiliar na implementação do Programa Nacional [7.4-13.1%], respectively. In the productive regions, the prevalence of infected herds were 36.9% [29.2-45.2%], 27.2% [22.8-32.1%], 40.4% [38.8-46.2%], and 50.3% [44.5-56

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 milking (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. Key words: Mycobacterium bovis. Paraná. Prevalence. Risk factors. ResumoA tuberculose bovina é uma zoonose de ampla distribuição geográfica no mundo e seu controle tem impacto direto na saúde pública e na produção pecuária. Neste trabalho, estimou-se a prevalência aparente Silva, M. do C. P. et al.de rebanhos e de bovinos adultos infectados, assim como os fatores de risco associados à presença da tuberculose nos rebanhos do estado do Paraná. O estado foi dividido em sete regiões pecuárias para amostragem independente. No total foram amostradas 1.419 propriedades e testados 16.045 animais. A prova diagnóstica utilizada foi a tuberculinização intradérmica cervical comparada. A prevalência aparente em propriedades e em bovinos adultos no estado do Paraná foi estimada em 2,15% [IC 95%: 1,31-3,00] e 0,42% [IC 95%: 0,04-0,81], respectivamente. Em relação às prevalências estimadas por região do estado, foram observadas heterogeneidades, não foi possível afirmar com 95% de confiança que alguma região se destacou das demais em relação à presença da tuberculose bovina. A região Oeste não apresentou animais positivos na amostra e nas demais regiões as prevalências de rebanho e animais variaram entre 1,03% -3,89% e 0,17% -1,08%, respectivamente. O modelo de regressão logística múltipla identificou como fatores de risco associados à presença de tuberculose bovina, o aumento do tamanho de rebanho (OR = 2.4) e a existência de ordenha mecanizada na propriedade (OR = 5.18). Assim, os resultados demonstraram que a tuberculose bov...

The objective of this study was to determine the prevalence of antibodies against Leptospira spp and their geographic distribution and to identify the risk factors associated with this disease in cattle herds with reproductive activity in the state of Paraná. A total of 14 163 females aged ≥24 months originating from 1 926 herds that were not vaccinated against Leptospira spp were evaluated. To detect the Leptospira spp antibodies, all serum samples were submitted for a microscopic serum-agglutination test (MAT). An epidemiological questionnaire was performed at each farm visited to characterize the management practices and study the risk factors associated with the presence or absence of Leptospira spp. To perform geoprocessing, the geographical coordinates of each farm were recorded with a Global Positioning System (GPS), which were then used to create a map. The apparent prevalence of bovine leptospirosis in the herds was the parameter used to generate the final risk map.