Paromomycin sulfate (oral gavage; 50 mg/kg-200 mg/kg; once daily; for five consecutive days two weeks post infection) reduces the number of oocyst per gram of feces and intestine. It shows minimal focal inflammation in only 20% of the sections at 50 mg/kg from the intestines of mice infected with C. parvum and only 10% of focal inflammation at 200 mg/kg.