Bothrops asper envenoming in cattle: Clinical features and management using equine-derived whole IgG antivenom.
Authors: Rodríguez C, Estrada R, Herrera M, Gómez A, Segura Á, Vargas M, Villalta M, León G
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Bothrops asper Envenoming in Cattle Bothrops asper snakebite represents a significant production and welfare issue for cattle operations in Central America, with envenomation triggering coagulopathy, haemorrhage, and local tissue damage that can prove fatal without intervention. Researchers in Costa Rica experimentally reproduced mild and severe envenomings by injecting cattle with 10 mg and 50 mg of B. asper venom intramuscularly, then evaluated the efficacy of equine-derived whole IgG antivenom administered intravenously at 6 hours post-bite. Antivenom doses of 120 mL controlled systemic effects in moderately envenomed animals, whilst 200 mL was required for severe cases; critically, prompt administration within the first 6 hours prevented systemic manifestations including coagulopathy and haemorrhage, though local swelling at the bite site persisted regardless of treatment. Delayed antivenom administration (beyond 6 hours) proved ineffective and did not improve survival in naturally envenomed cattle, underlining the importance of rapid clinical recognition and intervention. For practitioners in endemic regions, this work establishes clear dosing protocols and demonstrates that whilst antivenom cannot reverse local tissue damage, early recognition and treatment can be lifesaving by arresting the systemic complications that drive mortality in snakebite cases.
Read the full abstract on PubMed
Practical Takeaways
- •Early antivenom administration (within 6 hours) is essential for treating B. asper snakebites in cattle; delayed treatment offers no survival benefit
- •Dose antivenom based on envenomation severity: 120 mL for moderate cases and 200 mL for severe cases administered intravenously
- •Expect that antivenom will control systemic hemorrhage and coagulopathy but local swelling at the bite site will persist regardless of treatment timing
Key Findings
- •Intravenous antivenom (120 mL for moderate, 200 mL for severe envenomings) administered within 6 hours of B. asper snakebite effectively controlled systemic symptoms in cattle
- •Antivenom administration prevented systemic effects but did not reduce swelling at the bite site regardless of timing
- •Delayed antivenom administration was ineffective in saving naturally envenomed animals, emphasizing the critical importance of early treatment