[Intestinal cryptosporidiosis: a rare diarrheal disease in man].

Report on a 12-year-old boy with diffuse abdominal pains, vomiting and lasting diarrhoea. All the usual bacteriological examinations for Salmonella, Shigella and Campylobacter were negative. Routine search for intestinal parasites by the MIF method was also negative. Cryptosporidium oocysts were, exceptionally, detected in stool smears from the two samples stained by the modified Ziehl-Neelsen method.