Search by immunofluorescence for antigens of Rotavirus, Pseudomonas maltophilia, and Mycobacterium kansasii in Crohn's disease.

Crohn's-disease tissue was tested by indirect immunofluorescence for antigens of rotavirus, Pseudomonas maltophilia, and Mycobacterium kansasii. No reactions were obtained with anti-serum to P. maltophilia and M. kansasii, and a granular fluorescence seen with rotavirus antibody was probably non-specific.