clinical coccidiosis in which the affected birds show typical symptoms of the disease, such as bloody droppings and increased mortality, and

subdinical coccidiosis because the affected birds do not show visible symptoms of the disease but when a random sample of birds is examined, the presence of the gross lesions and the coccidia are found.

Anticoccidials are given in the feed to prevent disease and the economic loss often associated with subacute infection.

Prophylactic use is preferred because most of the damage occurs before signs become apparent, and because drugs cannot completely stop an outbreak.

Therapeutic treatments are usually given by water because of the logistical restraints of feed administration. Antibiotics and increased levels of vitamins A and K are sometimes used in the ration to improve rate of recovery and prevent secondary infections.