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  • Title: Experimentally induced toxicoinfectious botulism in horses and foals.
    Author: Swerczek TW.
    Journal: Am J Vet Res; 1980 Mar; 41(3):348-50. PubMed ID: 7369606.
    Abstract:
    Four experiments were performed to elucidate the pathogenesis of toxicoinfectious botulism in horses and foals. Groups of horses and foals were inoculated with one of the following: (1) crude toxin of Clostridium botulinum, type B, given IV, (2) C botulinum spores, given IM, (3) C botulinum spores, given IM, in necrotic lesions, and (4) C botulinum spores, given orally with and without dexamethasone. Toxin of C botulinum in minute amounts is toxic to horses. Clostridium botulinum spores produced toxicosis only when necrotic lesions were present. When C botulinum spores were given orally, they were innocuous. Toxicosis occurred when dexamethasone and C botulinum spores were given orally to a foal with necrotic lesions. Corticosteroids appear to predispose foals to the disease. In the animals where C botulinum organisms infected necrotic lesions, the clinical signs and the lesions seen on necropsy were identical with those seen in spontaneously occurring toxicoinfectious botulism.
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