1954 Volume 29 Issue 6 Pages 211-215
Variability of tub3roulin reactions depending on the difference in the locality of the skin tested, has been already reported by many workers. Tuberculin reactions tested on the flexor surface and the extensor surface of the forearm were compared, for in our country the test has been made on the flexor surface while the workers of WHO advocate the other side.
Children of primary and secondary schools totaling 2, 448 were divided into two groups. One group received four injections of each 0.1 ml on the flexor and extensor surfaces of both forearms, the left with the 1: 2, 000 dilution and the right with the 1: 10, 000 dilution of OT. The other group was treated likewise except that the left side forearm received the 1: 10, 000 dilution and the right side 1: 2, 000 dilution of OT. Readings were made 48 hours later, the results of which were as follows:
1. The grade of positivity as well as the intensity of redness was better on the flexor surface than on the extensor surface on both left and right forearms and their distribution was also different.
2. The intensity and frequency of induration, on the contrary, were stronger and higher on the extensor surface than on the flexor surface on both forearms. There were 34.7% induration positive cases by 1: 2, 000 dilution on the extensor surface while the flexor surface showed no reaction.
3. The formation of double redness was also higher on the extensor surface than on the flexor surface.
4. Except some difference in intensity, the reactions responded to the 1: 10, 000 dilution of OT were of the same tendency.
