Serologic evidence of Anaplasma marginale infection in white-tailed deer (Odocoileus virginianus) in Missouri.

Sera obtained from 616 (1.16%) of the 53,310 white-tailed deer (Odocoileus virginianus) harvested in Missouri in the fall of 1979 were analyzed by the modified rapid card agglutination (MRCA) test for antibodies against Anaplasma marginale. The results indicated a low prevalence (1.14%) of MRCA reactors in the white-tailed deer population sampled.