STUDIES ON THE CHANGE OF TUBERCULIN REACTION REPEATEDLY EXAMINED AT THE SAME SITE OF THE SKIN OF A BCG VACCINATED GROUP OF SCHOOL CHILDREN : 1. RESULTS OBTAINED 1 AND 3 MONTHS AFTER BCG VACCINATION

Abstract

Tuberculin reaction was successively examined using 2000 times diluted old tuberculin one and three months after BCG vaccination in school children. The second tuberculin test (3 months after vaccination) was done on the same site as the first test in the left forearm and on the different site in the right forearm. The results were read after 24 and 48 hours. (1) On the repeated sites of the left forearm the reaction appeared and decreased its intensity faster than the new sites of the right forearm (accelerated reaction). Moreover, the reaction of the repeated sites was stronger than the new sites (augmented reaction). (2) The tuberculin tests done in negative stadium do not influence the mode of reaction after the acquisition of allergy. (3) Both accelerated and augmented reactions appear at the second tuberculin test (the first repetition) on the same site.