The prevalence of Helminthes infection among Host and intermediate hosts at Mae-soi water gate project, Lampoon province year 2016-17

Abstract

Mae –soi water gate project was water resource development project at the downstream of Ping river located at Chiang-Mai and Lampoon districts which was once of the environment and health assessment plans of the Irrigation Department. These study aims to explore the infection rate of human’s helminthes and trematode infection among intermediate hosts. Descriptive statistics were used for data analysis while Data collection and field study were held on year 2016-2017. (1) Total of 442 samples were included to the study of helminthes infection by stool examination with formalin ether concentration technique. The result showed, there are 4 infected parasite species namely Opisthorchis viverrin 29.6%(131/442), small intestinal fluke 24.2%(107/442),Hookworm 4.0%(18/442) and Taenia species 0.5%(2/442) respectively.  (2) The trematode infection among intermediate host, in fresh water snail by shedding and crushing technique founded that total of 272 snails were collected. It can divide into 2 group; 11 species in Gastropoda and 2 in bivalve. Tarebia grnifera is only one species that founded Loxogenoides bicolor cercaria infection. It is a small intestinal fluke of flog and Amphibians. (3) The study of metacercaria infection among fresh water fishes by crushing technique. There are 3 fish species were infected;, Mystacoleucus ectypus (67.66%), Parachela siamensis (22.14%)and Henicorhynchus siamensis (15.63%)respectively. The metacercaria species are Haplorchis taichui and Haplorchoides sp. which was human and vertebrate’s parasite. In this study founded the infection of Opisthorchis viverrini in human which was a prior problem in medical and public health concern by a risk factor that related to cholangiocarcinoma. It is confirmed that in those area occur an epidemic of Opisthorchis viverrini with completed life cycle. It should be continuously surveillance follow by the EHIA plan and feedback all study result to the community for their preventive planning in long-term after the end of Watergate building project.