Necropsies were performed on 2 American bison (Bison bison) cows, 1 of which died acutely and the other that died after a week of illness. Gross and microscopic lesions were consistent with severe mycotic infection of the forestomachs. Both animals had been abruptly placed on a breeder ration 1 month after calving, and had developed acidosis and subsequent fungal invasion of tissues. History and lesions in this case indicate that bison are susceptible to rumen acidosis and its sequelae.
References
1.
AhernFXWilliamsIH: 1992, Nutrition for optimizing breeding herd performanceVet Clin North Am Food Anim Pract8:589–608
2.
BarkerIKVan DreumelAAPalmerN, eds.: 1993, The alimentary systemIn: Pathology of domestic animals, ed. JubbKVFKennedyPCPalmerN, 4th ed., pp. 47–50. Academic Press, Harcourt Brace Jovanovich, Publishers, San Diego, CA
3.
JohnsonB: 1991, Nutritional and dietary interrelationships with diseases of feedlot cattleVet Clin North Am Food Anim Prac7:133–142
4.
KhireddineBGrimardBPonterAA: 1998, Influence of flushing on LH secretion, follicular growth and the response to estrus synchronization treatment in suckled beef cowsTheriogenology49:1409–1423
5.
SweeneyRWDiversTJGilletteDMWhitlockRH: 1989, Mycotic omasitis and rumenitis as sequelae to sepsis in dairy cattle: six cases (1979–1986)J Am Vet Med Assoc194:552–553
6.
TowneGNagarajaTGCochranRC: 1989, Ruminal microbial populations and fermentation characteristics in bison and cattle fed high- and low-quality forageMicrob Ecol17:311–316
7.
TowneGNagarajaTGCochranRC: 1988, Comparisons of ruminal fermentation characteristics and microbial populations in bison and cattleAppl Environ Microbiol54:2510–2514
8.
TowneGNagarajaTGKempKK: 1988, Ruminal ciliated protozoa in bisonAppl Environ Microbiol54:2733–2736
9.
VarelVHDehorityBA: 1989, Ruminal cellulolytic bacteria and protozoa from bison, cattle—bison hybrids, and cattle fed three alfalfa—corn dietsAppl Environ Microbiol55:148–153
