Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc · 2026
Outbreak of equine botulism type C associated with consumption of baleage in Brazil.
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Souza Larissa L, Lima Acauane S, Martins Andressa S, Silva Tamires A, Borsanelli Ana Carolina, Dutra Iveraldo S, Pupin Rayane C, Gomes Danilo C, Lemos Ricardo A
Аннотация
An outbreak of botulism occurred in March 2024 among horses at a Quarter Horse stud farm in Central-West Brazil. After ingesting baleage, 22 of 26 (85%) horses housed in stables and fed baleage became ill. The affected horses had dysphagia, muscular weakness, fasciculations, and progressive recumbency; 13 of 22 (59%) died within a few days. The diagnosis of type C botulism was established based on clinical and epidemiologic findings and confirmed by mouse bioassays, which indicated botulinum toxin type C in liver samples and intestinal contents. Furthermore, PCR testing identified toxigenic Clostridium botulinum in the baleage consumed by the horses.