Failure to eliminate the carrier state of Anaplasma marginale by using long-acting injectable oxytetracycline

Authors

D. Gnad
T. Marston
Donald A. Llewellyn
G. Palmer
Larry C. Hollis

Keywords

Cattlemen's Day, 2004; Kansas Agricultural Experiment Station contribution; no. 04-242-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 923; Beef; Anaplasma marginale; Oxytetracycline

Abstract

Thirty-four Anaplasma marginale seropositive cows from a herd of 236 were allocated to treatments: 5 animals served as untreated controls, and 29 animals were treated with three injections of long-acting oxytetracycline at three-day intervals. Fourteen days after initiation of treatment, 100% of control cows and 89% of treated cows were found to have Anaplasma marginale present. Seventyfour days after initiation of treatment, 100% of control cows and 86% of treated cows were found to have Anaplasma marginale present. Use of injectable long-acting oxytetracycline was not effective in eliminating the carrier state of Anaplasma marginale from infected animals.

Recommended Citation

Gnad, D.; Marston, T.; Llewellyn, Donald A.; Palmer, G.; and Hollis, Larry C. (2004) "Failure to eliminate the carrier state of Anaplasma marginale by using long-acting injectable oxytetracycline," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss. 1. https://doi.org/10.4148/2378-5977.1617