After anaplasmosis has been diagnosed in a herd, various treatment and control options are available to the veterinarian and herd owner. A vaccine is available, but the animals must be vaccinated at least two weeks before the vector season. One dose is given followed by a second dose four weeks later. Thus, to be protected, the animals must receive the first dose six weeks before the horsefly season. Duration of immunity may exceed one year, and the manufacturer recommends biennial revaccination.
Current recommendations are to vaccinate only open animals.
Definitely do not vaccinate cows in late gestation. Vaccination will reduce clinical disease or the visible signs of the disease, but animals can still become infected and become carriers. Copyright 1999 University of Missouri. Published by University Extension , University of Missouri-Columbia. Ronald J. Turner, Director, Cooperative Extension Service, University of Missouri and Lincoln University, Columbia, Missouri 65211.