These antibiotics carry side effects including esophagitis, GI disease, and retinal damage and are thus primarily administered only to cats suffering from acute infection with clinical signs.[12] Furthermore, blood transfusion and administration of glucocorticoids relieve the severe anemia resulting from M. haemofelis infection of erythrocytes. Treated and untreated animals that recover from M. haemofelis infections generally remain carriers but seldom relapse with clinical disease.[2]