Cryptosporidiosis.

In the United States, the four groups at high risk of cryptosporidiosis are animal handlers, foreign travelers, children in day care centers and immunocompromised patients, including those with acquired immunodeficiency syndrome. In immunocompetent patients, the sporadic diarrheal illness is self-limited. Diagnosis is made by the identification of Cryptosporidium oocysts in stool specimens, but these parasites are easily overlooked and may be confused with yeast. At present, there is no specific therapy for this infection.