Control of Coccidiosis and Necrotic Enteritis - Greg Mathis

Never start any medicines at least in advance but start when morbity is 10 to 15 percent, it is better to give sulfa drugs on onset of coccidosis as amrolium is resistent to many strains. Fly control is necessary tool to avoid coccidiosis in cages. Ht of feeders may be so adjusted so the spilled litter does not make entry in feed any reduction in feed may be followed by increasing dose of coccidiostat. Ionophores and zinc bacitracin may not be given simultaneously.

Thanks for your valuable information.
My question why we get cocci infection after vaccination?