Abstract

• In order to find out the effectiveness of B.C.G. vaccination in rural school children, a study was carried out through analyzing the result of tuberculin test and old B.C.G. scar checking which were done in primary school and secondary school of Su-dong Myun, Nam Yang-ju Gun from 1981 to 1983.
  And following results were obtained;
  1) The old B.C.G. scar rate of primary school children was the highest in 2nd grade children with 99.0% and the lowest in 5th grade children with 64.5% in 1981.
  2) The tuberculin positive rate in primary school children was 20.1% and the rate was not different between male and female in 1981.
  3) The age specife tuberculin positive rate was shown the tendency of increasing according to the grade such as 8.3% in 1st grade, 14.4% in 2nd grade and 35.6% in 3rd grade children. And the tendency of decreasing was shown such as 30.4% in 4th grade and 13.0% in 5th grade and 16.3% in 6th grade children in 1981.
  4) The tuberculin positive rate was shown the tendency of increasing according to the time passing after B.C.G. vaccination such as 21.0% among the children group who are received B.C.G. vaccination one year before and 27.1% among the group received two years before and 31.4% among the group received three years before.
  5) The tuberculin positive rate of primary school children was 21.5% in the group with old B.C.G. scar and 13.1% in the group without B.C.G. scar.