Abstract:

Objective  To investigate the prevalence and severity of soil-transmitted nematode infections in Lingbi County as well as endemic patterns and influencing factors for supplying scientific strategies with prevention and management of this infection. Methods Modified Kato-Katz thick smear technique was used to determine Ascaris lumbricoides, Trichuris trichiura and hookworms from the stool samples(one stool specimen-three slides) collected from 1 000 local villagers of Lingbi County in yearly manner. Other parasite species, if detected, were registered as well. Another 15 soil samples were collected for microscopic examination on the presence of tapeworms. Results  A total of 3 000 persons were subjected to stool detection from 2011 to 2013. The average infection rate in the 3 years was 13.3%, 7.0% and 6.8% respectively. The infectiosity was mild in general, and the infection was primarily involved in ancylostomiasis. The major species found in the soil was Ancylostoma duodenale. Conclusion  Lingbi County falls into class 2 endemic area, and the infectiosity for infected people is generally mild.

Key words: Soil-transmitted nematode disease, Monitoring site, Analysis