山西省晋中地区人群寄生虫感染情况的调查

SURVEY OF HUMAN INTESTINAL PARASITE INFECTIONS IN JINZHONG PREFECTURE, SHANXI PROVINCE

本文报道山西省晋中地区人群寄生虫分布调查结果。从榆次、平遥、左权和昔阳4个县(市),11个点,调查5750人,其中寄生虫感染者2778例,感染率为48.3％。经标准化人口处理后的感染率为47.2％。男、女感染率分别为48.5％(1375/2835)和48.1％(1403/2915)。15岁以下和16岁以上年龄组的感染率分别为59.4％(1155/1946)和42.7％(1623/3804)。本次共查出原虫10种,蠕虫6种,未查见吸虫。蛔虫、鞭虫、蛲虫、钩虫、猪肉绦虫、微小膜壳绦虫、结肠内阿米巴、哈氏内阿米巴、微小内蜒阿米巴、溶组织内阿米巴、布氏嗜碘阿米巴、贾第虫、人毛滴虫、人酵母菌、迈氏唇鞭毛虫和等孢子球虫的感染率依次为25％、2.2％、5.6％、0.02％、0.02％、0.05％、4.5％、4.6％、6.4％、0.3％、1.1％、3.8％、5.8％、1.6％、0.04％和0.02％。

A survey of intestinal parasites was made in 11 sites of 4 counties of Jinzhong Prefecture. Of 5760 individuals examined, 2778 were found infected (infection rate 47.2%), 73.6% of the infected population haboured one species of parasite, while multiittfection with 2, 3 and 4 species of parasites amounted to 21.2%, 4.6% and 0.8% respectively of the infected population. There was no difference in infection rate between sexes. The infection rate for children under the age of 15 was significantly higher than that for above 15 (P<0.006). Of 17 species of parasites detected from 6 705 stool specimens, 6 were helminths (infection rate 33.0%) and 11 were protozoa (infection rate 27.6%). Protozoa and helminths accounted for 46.5%(1583/3 479) and 64.6% (1896/3479) of the total worms respectively. In protozoan infections, the incidence of Endolimax nana was the highest(6.4%),which was followed by Trichomonas hominis (6.8%) .Ascaris was the most common helminth with an incidence of 25%. The infection rate of T. trichiura reached 64.6% in children under 12 years of age. The survey revealed a definite relationship between age and prevalence; besides, family clustering of parasite infections was also evident, especially for Entamoeba coli.