关键词: 寄生虫, 感染率, 流行病学调查

Abstract: A survey of human parasites was conducted in 10 cities of Liaoning Province, which were selected according to different topography and socioeconomic status. Fecal examination by using Iodine direct smear, Kato-Katz thick smear, adhesive-tape techniques and fecal culture were carried out. Of 37 978 people residing in the studied sites, the overall parasite infection rate was 64.0%, being lower in the middle and northern parts (44.6-49.6%), and higher in the eastern, western and southern parts (72.9-82.8%) of this province. Multi-parasitism by 1, 2, 3 or 4 species of parasites accounted for 64.7 %, 9.1 %, 0.2 % and 0.1 %, respectively. High infection rate of Ascaris lumbricoides (64.1-61%) and Trichuris trichiura (9.3-17.6%) was seen in all age groups over 5 years, higher in females than in males. The infection rate of En-terobius vermicularis in children under 14 years old is 14.4%.There were 17 species of parasites discovered, comprising Entamoeba histolytica, Entamoeba coli, lodamoeba buetschlli, Entamoeba hartmanni, Enfamoeba nana, Giardia lamblia, Balantidium coli, Ascaris lumbricoides, Trichuris trichiura, Ancylostoma duo-denote, Enterobius vermicularis, Trichostrongylus sp., Clonorchis sinensis, Heterophyes sp., tapeworm, Hymenolepis nana, Macracanthorhynchus hirudinaceus. Among them Balantidium coli, Heterophyes sp. and Trichostrongylus sp. were recorded for the first time in Liaoniag Province.