Cryptosporidial Cholecystitis

To the Editor: Cryptosporidiosis, a protozoan zoonosis affecting the microvillus layer of gastrointestinal cells, has recently been recognized as a cause of diarrhea in immunocompromised patients¹ Cryptosporidial involvement of the biliary tract has been only exceptionally reported in animals.² We describe a patient with the acquired immune-deficiency syndrome complicated by extensive gastrointestinal cryptosporidiosis, in whom the gallbladder was also found to be affected by this parasitic infection. A 33-year-old homosexual man who had had diarrhea for seven months with fever, abdominal pain, and weight loss was found to have laboratory evidence of cholestasis. Computerized tomography of the abdomen and endoscopic.