Skin test reactivity in inflammatory bowel disease in the United States and Czechoslovakia.

Inflammatory bowel disease (IBD) patients in the United States of America (USA) and Czechoslovakia (CSSR) were categorized by clinical, pathological, and radiological criteria as having Crohn's disease (CD) or ulcerative colitis (UC) and were tested with five skin test antigens [Candida, mumps, purified protein derivative (PPD), streptokinase-streptodornase (SK-SD), and trichophytin] at two different dilutions in an attempt to elicit some evidence of anergy. No significant differences were encountered between the USA and CSSR populations or between any patient group and its controls.