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Estudo da Prevalência de Infeção por Fasciola Hepática em Ovinos Serra da Estrela
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| 26.46 MB | Adobe PDF |
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Abstract(s)
A fasciolose, causada pelo trematode Fasciola hepatica, constitui uma das parasitoses mais relevantes
na produção de ruminantes, provocando perdas económicas significativas e representando um risco
crescente para a saúde pública, enquanto zoonose emergente. Este estudo teve como objetivo
determinar a prevalência da infeção por F. hepatica em ovinos da raça Serra da Estrela e identificar os
principais fatores de risco associados à sua ocorrência. Para tal, foram recolhidas 275 amostras fecais
em 19 explorações de dimensão média, localizadas nos concelhos de Seia e Oliveira do Hospital, na
região Centro de Portugal. As amostras foram analisadas pelo método de sedimentação natural, e os
dados epidemiológicos foram obtidos através da seriação de variáveis selecionadas como mais
relevantes para o estudo, com base em informação técnica cedida pela ANCOSE - Associação Nacional
de Criadores de Ovinos da Serra da Estrela. A prevalência global apurada foi de 14,55%, com maior
ocorrência em animais com condição corporal inferior. Realizou-se ainda a prospeção e identificação
morfológica de gastrópodes hospedeiros intermediários, com destaque para a presença de Galba
truncatula. A análise estatística revelou associações significativas entre a infeção e variáveis como a
altitude, a dimensão da exploração e o score fecal. Conclui-se que a infeção por F. hepatica está
presente de forma relevante nos efetivos analisados, sendo fundamental implementar estratégias
integradas de controlo, considerando o seu impacto zootécnico e o seu potencial zoonótico.
Hepatic fasciolosis, caused by the trematode Fasciola hepatica, is one of the most relevant parasitic diseases affecting ruminant production, leading to significant economic losses and posing an emerging public health threat as a zoonosis. This study aimed to determine the prevalence of F. hepatica infection in Serra da Estrela sheep and to identify the main risk factors associated with its occurrence. A total of 275 fecal samples were collected from 19 medium-sized farms located in the municipalities of Seia and Oliveira do Hospital, in central Portugal. The samples were analyzed using the natural sedimentation technique, and epidemiological data were obtained through the selection of variables most relevant to the study, based on technical information provided by ANCOSE - the National Association of Serra da Estrela Sheep Breeders. The overall prevalence was 14.55%, with a higher incidence observed in animals with lower body condition scores. Additionally, a field survey and morphological identification of intermediate gastropod hosts were conducted, with Galba truncatula being the most frequently identified species. Statistical analysis revealed significant associations between infection and variables such as altitude, farm size, and fecal score. It is concluded that F. hepatica infection is notably present in the studied flocks, highlighting the need to implement integrated control strategies that consider both its productive impact and zoonotic potential.
Hepatic fasciolosis, caused by the trematode Fasciola hepatica, is one of the most relevant parasitic diseases affecting ruminant production, leading to significant economic losses and posing an emerging public health threat as a zoonosis. This study aimed to determine the prevalence of F. hepatica infection in Serra da Estrela sheep and to identify the main risk factors associated with its occurrence. A total of 275 fecal samples were collected from 19 medium-sized farms located in the municipalities of Seia and Oliveira do Hospital, in central Portugal. The samples were analyzed using the natural sedimentation technique, and epidemiological data were obtained through the selection of variables most relevant to the study, based on technical information provided by ANCOSE - the National Association of Serra da Estrela Sheep Breeders. The overall prevalence was 14.55%, with a higher incidence observed in animals with lower body condition scores. Additionally, a field survey and morphological identification of intermediate gastropod hosts were conducted, with Galba truncatula being the most frequently identified species. Statistical analysis revealed significant associations between infection and variables such as altitude, farm size, and fecal score. It is concluded that F. hepatica infection is notably present in the studied flocks, highlighting the need to implement integrated control strategies that consider both its productive impact and zoonotic potential.
Description
Keywords
Diagnóstico coprológico Epidemiologia veterinária Fasciola hepatica Fasciolose Hospedeiro intermediário Ovinos Serra da Estrela Prevalência Coprological diagnosis Fasciolosis Intermediate host Prevalence Serra da Estrela sheep Veterinary epidemiology