ABSTRACT
A survey of intestinal worm infection was conducted in the island-commune of Minh Chau (Van Don district) and the coastal commune of Phuong Nam (Dong Bi district) of the north-eastern province of Quang Ninh. Stool samples of 900 local people were examined using Willis method. A high prevalence of intestinal worm infection with a cumulative infection rate of 94.9% (854/900), of which Ascaris is most common: 94.8% (853/900), followed by Trichuris: 32% and hookwonn: 12.8% was found. Single infection was 58.3% (498/854), co-infection with three species was 5.4% (46/854), with two species, (mainly with Ascaris and Trichuris) was 36.1% (308/854). The infection rate of Ascaris and Trichuris was not different between male and female but increased with ages above 15 years old (97.7% vs 37.7%). However, hookworm infection was found higher (16.9%) in females compared to males (7.9%) (P<0.05) and most increased at the ages of 10 - 15 years old