最近の鹿児島県K市における小・中学校児童・生徒のツベルクリン反応の結果
特に再度ツベルクリン反応をおこなった場合の1回目と2回目の強度の比較について
1988 年 63 巻 2 号 p. 93-99
詳細
1988 年 63 巻 2 号 p. 93-99
Recently tuberculin positivity in primary and middle school students has been decreasing.
In this report, tuberculin sensitivity of school children aged 6, 7 and 12, 13 in K city, Kagoshima Prefecture were compared with that in all Japan and in all Kagoshima Prefecture.
The results of tuberculin reactions in 12 or 13 aged students of A middle school in K city was studied chronologically during the period from 1970 and 1986, and were analysed according to the intervals from the previous tuberculin tests.
In 1986 second tuberculin tests were performed in A middle school after about 3 weeks from the first test and the results of the two tuberculin tests were compared.
The results obtained were as follows:
1) Tuberculin negativity of students in K city, Kagoshima Prefecture was 45.4%, 24.0%, 23.2%, and 17.1% respectively in 6, 7, 12, and 13 aged students in 1983, and 45.5%, 25.9%, 25.4%, and 17.7% respectively in 1984, 43.5%, 23.6%, 25.2%, and 17.6 respectively in 1985. These rates seemed to be higher than that in all over Japan and in all Kagoshima Prefecture.
2) The rate of tuberculin negative students in A middle school in K city was increased from 0.7% in 1970 to 58.3% in 1985, and dividing by the interval of two tuberculin tests, it was 12.5% in students with 1 year interval, 12.3% with 2-3 years, 19.2% with 4-5 years, 46.5% or 57.0% with 5-7 years interval from previous tuberculin test. The intensity of tuberculin sensitivty seemed to decrease slightly when the interval from the previous tuberculin tests exceeded 3 years, and decrease considerably when exceeded 5 years.
3) In repeated tuberculin tests, 125 students with negative reaction in the first tests changed to doubtful in 9.6%, to positive in 52.8% and remained negative in 37.6% in the second tests; 54 doubtful students changed to negative in 7.4%, to positive in 74.1%, remained doubtful in 7.4%.
In conclusion, in students with previous BCG vaccination, repeated tuberculin test for the negative reactors were highly recommented before BCG revaccination, especially for students with the interval from previous tuberculin test exceeded 3 years.
