The present investigation studied the HI antibody of Japanese Encephalitis in 2,111 adults between 18-39 years who were residing in the Seoul area.
The following results were obtained.
1. During the period from Dec. 1969 to Nov. 1970 HI antibody w...
The present investigation studied the HI antibody of Japanese Encephalitis in 2,111 adults between 18-39 years who were residing in the Seoul area.
The following results were obtained.
1. During the period from Dec. 1969 to Nov. 1970 HI antibody was found in 952 (45.1 % ) out of the 2,111 adults examined.
2. The positive rate of HI antibody was 23.7% (97 out of 410) during the months from December to April; 44.4% (351 out of 790) from May to July; 57.5% (472 out of 821) from August to October and 35.6% (32 out of 90) during November. The minimal percentage of positive rates were during April-20.2% (23 out of 114) and the maximum was during Sept?ember - 62.0% (228 out of 368).
3. When the incidence was related to the age of the adult the positive HI antibody rates were 39.5 % (357 out of 904) from 20-24 years, 50.6 % (305 out of 603) from 25-29 years and 52.3% (269 out of 514) from 30-34 years. It appears that from 20-34 years the rate of positive HI antibody titer parallels the increase in age.
4. The predominant HI antibody in the sera tested was 1:10 during September, 1:20 during October, 1:49 during August, and 1:80 during June, respectively