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United States Department of Agriculture

Agricultural Research Service

Research Project: IDENTIFICATION OF DISEASE MECHANISMS AND CONTROL STRATEGIES FOR BACTERIAL RESPIRATORY PATHOGENS IN CATTLE Title: Necrotic pharyngitis associated with Mycoplasma bovis infections in American bison (Bison bison)

Authors
item Dyer, Neil -
item Register, Karen
item Miskimins, Dale -
item Newell, Teresa -

Submitted to: Journal of Veterinary Diagnostic Investigation
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 17, 2013
Publication Date: March 1, 2013
Citation: Dyer, N., Register, K.B., Miskimins, D., Newell, T. 2013. Necrotic pharyngitis associated with Mycoplasma bovis infections in American bison (Bison bison). Journal of Veterinary Diagnostic Investigation. 25(2):301-303.

Interpretive Summary: Mycoplasma bovis (M. bovis) has recently emerged as a significant and costly infectious disease problem in bison, generally associated with severe pneumonia. Here we describe three diagnostic cases in which M. bovis is strongly implicated as a causative agent of necrotic pharyngitis. The bacterium was isolated from lesions of the pharynx or lung of three American bison, at two different locations in the upper Midwest, with severe, necrotic pharyngeal abscesses. Tissue pathology typical of M. bovis infection in bovines was observed. Other potential pathogens were isolated from some samples but only M. bovis was consistently isolated from all the affected animals. Veterinarians and producers working with bison should be aware that M. bovis may be associated with pharyngitis in bison.

Technical Abstract: Mycoplasma bovis (M. bovis) has recently emerged as a significant and costly infectious disease problem in bison, generally presenting as severe, caseonecrotic pneumonia. Here we describe three diagnostic cases in which M. bovis is strongly implicated as a causative agent of necrotic pharyngitis. The bacterium was isolated from lesions of the pharynx or lung of three American bison, at two different locations in the upper Midwest, with severe, necrotic pharyngeal abscesses. Caseonecrotic inflammation typical of M. bovis infection in bovines was observed. Other potential pathogens were isolated from some samples but only M. bovis was consistently isolated from all the affected animals. Veterinarians and producers working with bison should be aware that M. bovis may be associated with pharyngitis in bison.

Last Modified: 8/27/2014
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