Investigation on spread and hazards of human parasites in Qushui Village,Suixi County,Zhanjiang City

Objective To understand the transmission of human parasites in Qushui Village,Yangqing Town,Suixi County,Zhanjing City,Guangdong Province.Methods The direct stool smear,floatation,Kato-Katz technique,and hookworm larva culture were used for the parasite infections.The questionnaire survey was applied for the hazards of parasites.The dissections on rats and snails were used for Angiostrongylus cantonensis infection.Results Five parasites were found and the total infection rate was 10.75%.The infection rates of hookworm(Necator americanus),Ascaris lumbricoides and Trichuris trichiura were 6.07%,1.87% and 1.87%,respectively,and the infection rates of Enterobius vermicularis and Tyroglyrhus farinae were both 0.47%.The infections were not correlated with the career and age but preferred to males.The densities of infections were slight.The rate of dermatitis caused by hookworm larvae was 69.23%.The infection rates of Angiostrongylus cantonensis were 16.66%,13.04% and 10.00%,respectively in rats,Achatina fulica and Ampularum crossean.Conclusion The main species of human parasites are nematodes,with hookworm predominately,in Qushui Village,Suixi County.This area is the natural foci of Angiostrongylus cantonensis.