ARE POST-VACCINAL REACTIONS A CONCERN WITH COCCIDIOSIS VACCINATION?
A. Post-vaccinal reaction with Coccivac vaccines have not been a problem since the development of spray cabinet technology, which replaces application of the vaccine by other routes such as spraying it on feed or into the eyes. Uniform coverage is important. If some birds are missed by initial vaccination, then other, unexposed birds receive an uncontrolled shedding dose of oocysts, which can result in insufficient protection for some birds or strong post-vaccinal reactions for others. In the past, it was necessary to administer amprolium after vaccination to prevent excessive oocyst shedding and post-vaccinal reactions that might occur as a result of uneven coverage. In addition, birds that did not receive a full dose of the vaccine were exposed to sporulated oocysts from the litter and didnt always achieve their full weight or performance. The spray cabinet has changed all that by providing more uniform vaccine coverage, which has led to better protection. With the spray cabinet, 100
