Simultaneous occurrence of type C botulism in poultry and dogs
2025
Andressa S. Martins | Lisandra R. Alves | Tamires A. Silva | Ronald M. Santos | Ana Maria S. Almeida | Júlia R. Saraiva | Iveraldo S. Dutra | Ana Carolina Borsanelli
ABSTRACT: Botulism is a serious disease caused by neurotoxins produced by Clostridium botulinum, an anaerobic spore-forming bacterium commonly found in the environment and the intestinal tract of animals. The disease occurs through the ingestion of food or water contaminated with preformed toxins, leading to progressive flaccid paralysis across various susceptible species. This study reports the clinical, epidemiological, and laboratory aspects of the simultaneous occurrence of type C botulism in domestic birds (chickens and ducks) and dogs on a farm in Rio Pomba, Minas Gerais, Brazil. The farm housed 47 chickens, two ducks, and seven dogs. Over approximately 15 days, 40 chickens (85.1%) and one duck (50%) fell ill and died. Among the seven dogs, five (71.4%) exhibited clinical signs, and two (28.6%) ultimately died. Diagnosis of botulism was confirmed through bioassay technique and neutralization using homologous antitoxin in mice, which identified botulinum toxin type C in serum samples from two chickens with clinical signs, in samples from two necropsied chickens and in one water sample. The most probable transmission route was likely the remains of a decomposing bovine carcass, and the water that had accumulated around it, to which the chickens, ducks and dogs had access, highlighting the importance of proper carcass disposal to prevent disease outbreaks.
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