The natural foci of Paragonimus westermani was founded in Huadian City in 1978 and the positive rate of P.westermani skin test was 17.04% among residents,and the rate decreased to 2.08% in 2005.

• 桦甸市于1978年发现为卫氏并殖吸虫自然疫源地；居民肺吸虫皮试阳性率17.；04%25。2005年居民肺吸虫皮试阳性率2