Seroprevalence of anaplasmosis in the Red River Plains and South-east areas of Louisiana

Abstract
The indirect fluorescent antibody test was used to detect antibodies to Anaplasma marginale in serum samples collected from cattle in the Red River Plains and South-east areas of Louisiana. Convenience sampling of herd clusters was used. A reactor rate of 7.8% was found in 11 085 samples. Beef cattle had a 11.2% reactor rate compared with 3.8% for dairy cattle. The Angus and Angus cross-breed group had the highest reactor rate.