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Avaliação Epidemiológica de Leptospirose Em Bovinos
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Advisor(s)
Abstract(s)
Com o objetivo de compreender de forma mais profunda o impacto da Leptospirose
em bovinos na região do Alto Alentejo, procedeu-se à realização de um estudo de
avaliação epidemiológica da doença, centrado na identificação dos serotipos de
Leptospira mais prevalentes. O estudo incidiu sobre os concelhos de Elvas, Campo
Maior, Monforte e Arronches, tendo decorrido durante os quatro meses
correspondentes ao estágio curricular, entre fevereiro e junho de 2025. Recolheram-se
e analisaram-se amostras biológicas em 11 explorações pecuárias, totalizando 83 animais.
As fêmeas bovinas foram submetidas a testes serológicos (teste de aglutinação
microscópica), enquanto alguns bezerros foram avaliados por PCR, através da análise de
órgãos recolhidos post-mortem. Dos animais amostados, 67 (81%) revelaram resultado
positivo para Leptospira spp., e os 16 restantes (19%) apesentaram resultado negativo.
O serogrupo L. Pomona foi o mais detetado, representando 27% dos resultados positivos,
seguido de L. Mozdok (23%) e L. Pyrogenes (13%). Estes três serogrupos concentraram
mais de 78% das infeções identificadas, sugerindo uma predominância significativa destas
variantes na região estudada. A diversidade dos serovares identificados reflete a
presença de múltiplos hospedeiros de manutenção na região, reforçando a necessidade
de uma abordagem integrada no controlo da leptospirose bovina. Estes dados apontam
para a importância de estender a avaliação epidemiológica a outros concelhos do
Alentejo, com vista à implementação de medidas eficazes de controlo e prevenção da
propagação da doença.
With the aim of gaining a deeper understanding of the impact of leptospirosis in cattle in the Alto Alentejo region, an epidemiological evaluation study of the disease was carried out, focusing on the identification of the most prevalent Leptospira serotypes. The study focused on the municipalities of Elvas, Campo Maior, Monforte and Arronches, and took place during the four months of the curricular internship, between February and June 2025. Biological samples were collected and analyzed from 11 livestock farms, totaling 83 animals. Female cattle were subjected to serological testing (microscopic agglutination test), while some calves were evaluated by PCR through organ analysis collected post-mortem. Of the animals sampled, 67 (81%) tested positive for Leptospira spp., and the remaining 16 (19%) were negative. The L. Pomona serogroup was he most frequently detected, accounting for 27% of the positive results, followed by L. Mozdok (23%) and L. Pyogenes (13%). These three serogrupos accounted for over 78% of the infections identified, suggesting a significant predominance of these variants in the studied region. The diversity of identified serovares reflects the presence of multiple maintenance hosts in the area and reinforces the need for an integrated approach to controlling bovine leptospirosis. These findings highlight the importance of extending the epidemiological assessment to other municipalities in the Alentejo region, in order to implement effective measures for the control and presentation of the spread of the disease.
With the aim of gaining a deeper understanding of the impact of leptospirosis in cattle in the Alto Alentejo region, an epidemiological evaluation study of the disease was carried out, focusing on the identification of the most prevalent Leptospira serotypes. The study focused on the municipalities of Elvas, Campo Maior, Monforte and Arronches, and took place during the four months of the curricular internship, between February and June 2025. Biological samples were collected and analyzed from 11 livestock farms, totaling 83 animals. Female cattle were subjected to serological testing (microscopic agglutination test), while some calves were evaluated by PCR through organ analysis collected post-mortem. Of the animals sampled, 67 (81%) tested positive for Leptospira spp., and the remaining 16 (19%) were negative. The L. Pomona serogroup was he most frequently detected, accounting for 27% of the positive results, followed by L. Mozdok (23%) and L. Pyogenes (13%). These three serogrupos accounted for over 78% of the infections identified, suggesting a significant predominance of these variants in the studied region. The diversity of identified serovares reflects the presence of multiple maintenance hosts in the area and reinforces the need for an integrated approach to controlling bovine leptospirosis. These findings highlight the importance of extending the epidemiological assessment to other municipalities in the Alentejo region, in order to implement effective measures for the control and presentation of the spread of the disease.
Description
Keywords
Leptospirose bovina MAT PCR seroprevalência zoonose Bovine leptospirosis seroprevalence zoonosis
Pedagogical Context
Citation
Correia, I.S.N.C.(2025).Avaliação Epidemiológica de Leptospirose Em Bovinos. EScola Superior de Biociências de Elvas. Dissertação de Licenciatura. Repositório
Publisher
Escola Superior de biociências de Elvas