Objective To understand the status of Toxoplasma gondii infection in the population of Pu er City so as to pro-vide the evidence for formulating the strategy of toxoplasmosis control. Methods The population from Jingdong Jinggu and Menglian counties in Pu er City was surveyed IgG of T. gondii in serum was detected by ELISA. Results Totally 906 resident serum samples were detected and the IgG positive rate was 24.2%. The positive rates were higher in the aged groups of 30-39 years and 60-69 years and the difference among different aged groups was significant χ2=17.77 P 0.01 . There were no si-gnificant differences between different sexualities and among different educational levels and living habits P 0.05 . The posi-tive rates were 26.6% 194/730 15.5% 22/142 and 8.8% 3/34 in farmers students and other occupations respectively and there was a significant difference among them χ2=12.51 P 0.01 . The positive rates were 23.3% 198/849 and 36.8%21/57 in the farmers who had the habit of rearing pigs in pens and the farmers who had the habit of free ranging pigs respec-tively and there was a significant difference between them χ2=5.33 P 0.05 . Conclusion The IgG positive rate of T. go-ndii is very high in Pu er City and therefore the health education for toxoplasmosis control should be strengthened.

Objective To understand the prevalence of human intestinal parasite infections in Lahu Ethnic residents so as to provide the evidence for effective control. Methods The prevalence of soil-transmitted nematode infections in local people was determined by Kato-Katz technique and individual sanitary behaviors and habits were requested by a standardized questionnaire in 3 villages of Xiaojie Township,Jinghong City,Yunnan Province. The relationship between intestinal parasite infections and behav-ioral characteristics was analyzed. Results Of 289 subjects,255 individuals were infected with soil-transmitted nematodes;the prevalence was 88.24%. Among the infected individuals,210 were found infected with hookworm and the infection rate was 72.66%;154 subjects were infected with Ascaris lumbricoides and the infection rate was 53.29%;13 were infected with Trichuris trichura,and the infection rate was 4.50%;16 were infected with other parasites and the infection rate was 5.54%. The percentag-es of people with light infection of hookworm,A. lumbricoides and T. trichura were 90.48%,97.40%and 100%,respectively. Con-clusions There is high prevalence of soil-transmitted nematode infections in Lahu Ethnic residents in Jinghong City,but the in-fection intensity was generally low. The control and monitoring of soil-transmitted parasite infections should be strengthened in this area.

Objective To understand the status of soil?transmitted nematode infections in Xiding Township,Menghai Coun?ty,Yunnan Province,so as to provide the reference for formulating the strategy of soil?transmitted nematodosis control. Meth?ods Soil?transmitted nematode eggs in feces were detected by the Kato?Katz method,and the eggs of Enterobius vermicularis were detected by the cellophane tape method in children. The soil samples were collected from vegetable ,fruit and other crop fields of 15 residents randomly to detect hookworm. Results The stool samples from 1 002 residents were examined and the soil?transmitted nematode infection rate was 20.06%(201/1 002). The infection rates of hookworm,Ascaris lumbricoides and Trichu?ris trichura were 18.96%(190 cases),1.70%(17 cases)and 0.90%(9 cases)respectively. The percentages of people with light infection of hookworm,A. lumbricoides and T. trichura were 97.37%(185/190),88.24%(15/17)and 100%(9/9)respec?tively. No infection of E. vermicularis was found. Fifteen soil samples were tested,and no hookworm was found in the soil. Con?clusion The infection rate of soil?transmitted nematode in Xiding Township,Menghai County is high,but the infectiosity is light. The control and monitoring of soil?transmitted nematodosis should be strengthened in this area.