1. In 2002, only 2 species of geohelminthes were identified including Ascaris lumbricoides and Pinworm, the infection rate of those is 1.09% and 13.16% respectively.
   2002年发现土源性线虫有蛔虫、蛲虫2种，感染率分别为1.09%和13.16%。

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