Microfilaria rate of the population in 1991 was 0.61%, which was distributed in 15 towns northwest area of the county.

• 1991年调查人群平均微丝蚴率为0.；61%25；主要流行区分布于县西北区域的15个乡镇；以马来丝虫为主的马来、班氏两种丝虫病混合流行区。