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Aspectos clínicos e epidemiológicos do surto de botulismo em bovinos confinados e alimentados com silagem de milho no Mato Grosso do Sul - Brasil
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| DM_36078 | 1.97 MB | Adobe PDF |
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Abstract(s)
Os surtos de botulismo em bovinos geram grande impacto na economia brasileira, uma vez que a bovinocultura é considerada uma das principais atividades econômicas do país, sendo atuante no cenário mundial do agronegócio. No presente trabalho são descritos os aspectos epidemiológicos, clínico-patológicos e laboratoriais do surto de intoxicação botulínica em bovinos de corte, alimentados com silagem de milho, ocorrido no Estado de Minas Gerais no período de 2 a 5 de agosto de 2017. A doença acarretou a morte de 1.100 bovinos precoces e preparados para o abate, consistindo uma alta taxa de letalidade e gerando ume perda econômica estimada em 2 milhões de reais para o pecuarista. Os animais apresentaram sinais e sintomas da doença, contribuindo para a resolução do diagnóstico clínico. Foram identificados dificuldade de deambulação, sinais clínicos de paralisia progressiva dos membros posteriores para os inferiores, hipotonia e sialorreia. Ausência de alterações neurológicas. Os animais permaneciam em decúbito lateral, paralisia cardiorrespiratória seguida de morte. O diagnóstico laboratorial constatou presença de toxina botulínica C e D em amostras de alimento servido ao gado e no soro bovino. Foram investigadas ainda presença de toxina em fragmentos do fígado, conteúdo ruminal e intestinal bovino que atestaram negativo. Além de amostras de água, ração e grãos de soja, que não continham a toxina. A existência de toxina na alimentação revela a importância da armazenagem e conservação corretas da silagem, de modo que não propicie um ambiente favorável para o desenvolvimento da bactéria Clostridium botulinum sendo fator de risco para a ocorrência de surtos.
The outbreaks of botulism in cattle have a great impact on the Brazilian economy, since cattle farming is considered one of the main economic activities in the country, being active in the global agribusiness scenario. This paper describes the epidemiological, clinical-pathological and laboratory aspects of the outbreak of botulinum intoxication in beef cattle, fed with corn silage, which occurred in the State of Minas Gerais from August 2 to 5, 2017. The disease caused the death of 1,100 precocious and prepared cattle for slaughter, consisting of a high lethality rate and generating an economic loss estimated at 2 million reais for the rancher. The animals showed signs and symptoms of the disease, contributing to the resolution of the clinical diagnosis. Deambulation difficulties, clinical signs of progressive paralysis from the posterior to the lower limbs, hypotonia and sialorrhea were identified. Absence of neurological changes. The animals remained in lateral decubitus, cardiorespiratory paralysis followed by death. The laboratory diagnosis found the presence of botulinum toxin C and D in samples of food served to cattle and in bovine serum. The presence of toxin in liver fragments, ruminal and bovine intestinal contents were also investigated and confirmed negative. In addition to samples of water, feed and soy beans, which did not contain the toxin. The existence of toxins in the diet reveals the importance of correct silage storage and conservation, so that it does not provide a favorable environment for the development of the bacterium Clostridium botulinum, which is a risk factor for the occurrence of outbreaks.
The outbreaks of botulism in cattle have a great impact on the Brazilian economy, since cattle farming is considered one of the main economic activities in the country, being active in the global agribusiness scenario. This paper describes the epidemiological, clinical-pathological and laboratory aspects of the outbreak of botulinum intoxication in beef cattle, fed with corn silage, which occurred in the State of Minas Gerais from August 2 to 5, 2017. The disease caused the death of 1,100 precocious and prepared cattle for slaughter, consisting of a high lethality rate and generating an economic loss estimated at 2 million reais for the rancher. The animals showed signs and symptoms of the disease, contributing to the resolution of the clinical diagnosis. Deambulation difficulties, clinical signs of progressive paralysis from the posterior to the lower limbs, hypotonia and sialorrhea were identified. Absence of neurological changes. The animals remained in lateral decubitus, cardiorespiratory paralysis followed by death. The laboratory diagnosis found the presence of botulinum toxin C and D in samples of food served to cattle and in bovine serum. The presence of toxin in liver fragments, ruminal and bovine intestinal contents were also investigated and confirmed negative. In addition to samples of water, feed and soy beans, which did not contain the toxin. The existence of toxins in the diet reveals the importance of correct silage storage and conservation, so that it does not provide a favorable environment for the development of the bacterium Clostridium botulinum, which is a risk factor for the occurrence of outbreaks.
Description
Keywords
Bolulismo Bovino Clostridium botulinum Silagem de milho Bolulism Bovine Clostridium botulinum Corn silage