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Mycotic rumenitis in American bison (Bison bison)
1Department of Veterinary Diagnostic Services, North Dakota State University, Fargo 58501, USA.
Summary
Two American bison cows developed severe mycotic infections due to abrupt dietary changes leading to rumen acidosis. This highlights bison susceptibility to this metabolic disorder and its potentially fatal fungal sequelae.
Area of Science:
- Veterinary Pathology
- Ruminant Nutrition
- Mycology
Background:
- Dietary management in livestock is crucial for preventing metabolic disorders.
- Rumen acidosis can predispose animals to secondary infections.
Observation:
- Two American bison cows experienced acute and subacute deaths.
- Necropsies revealed severe mycotic infections localized to the forestomachs.
Findings:
- Both bison developed rumen acidosis following an abrupt switch to a high-energy breeder ration post-calving.
- Acidosis facilitated secondary fungal invasion of forestomach tissues.
Implications:
- Bison are susceptible to developing rumen acidosis and subsequent mycotic infections.
- Sudden dietary shifts in bison require careful management to prevent potentially fatal sequelae.