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Antimicrobial Agents and Chemotherapy, December 2000, p. 3476-3477, Vol. 44, No. 12
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Susceptibilities of Corynebacterium bovis and Corynebacterium amylocolatum Isolates from Bovine Mammary Glands to 15 Antimicrobial Agents

Jeffrey L. Watts1,* and Silvia Rossbach2

Pharmacia and Upjohn Animal Health, Kalamazoo, Michigan 49001,1 and Department of Biological Sciences, Western Michigan University, Kalamazoo, Michigan 490082

Received 11 February 2000/Returned for modification 30 July 2000/Accepted 6 September 2000

Coryneform bacteria are frequently isolated from bovine mastitis and are associated with economic losses. Generally, the MICs of the 15 antimicrobial agents tested at which 90% of the isolates tested are inhibited for 46 Corynebacterium bovis and 13 Corynebacterium amylocolatum strains were low. These are the first quantitative antimicrobial susceptibility data available for coryneforms from bovine mastitis. Data from this study suggest that comparable corynebacteria from humans have a much higher level of antimicrobial resistance to a variety of antimicrobial agents.


* Corresponding author. Mailing address: Pharmacia and Upjohn Animal Health, 7923-190-039, Kalamazoo, MI 49001. Phone: (616) 833-2605. Fax: (616) 833-3295. E-mail: jeffrey.l.watts{at}am.pnu.com.


Antimicrobial Agents and Chemotherapy, December 2000, p. 3476-3477, Vol. 44, No. 12
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.