[Head Louse Infestation Among The Students In Yongyang-Gun, Kyongsangbuk-To].

The purpose of this study is to know the present situation of head louse infestation among the students in Yongyang-gun, Kyongsangbuk-to From May 11 to June 20, 1984, a total of 5,937 students in 23 primary and 3 middle schools were examined to identify the adult worms of head louse and/or their nits on the hair. The results are as follows: 1. The overall infestation rate was 44.5 percent and the rates ranged from 19.6 percent to 88.6 percent by each school. 2. In primary schools, the rate was 53.0 percent and in middle schools, 27.1 percent. 3. The school boys' rate was 33.2 percent and the school girls' 55.6 percent, and the difference was statistically significant (p<0.001). 4. The rates were different by grades in middle schools. 5. The rates were different by areas (Myons) (p<0.001). 6. The adult worms collected from the students were Pediculus humanus var. capitis.