MULTI-INFECTION WITH HELMINTHS IN ADULTS FROM NORTHEAST THAILAND AS DETERMINED BY POSTTREATMENT FECAL EXAMINATION OF ADULT WORMS

Six hundred and eighty-one residents from 16 provinces in northeast Th ailand who had previously been found positive for Opisthorchis viverri ni and Taenia spp. eggs were given 40 mg Praziquantel (Bayer, Germany) , per kg body weight. The total stool output for one to three days was collected and examined for adult worms. The prevalence of O. viverrin i in this group was 92.4%. The intestinal flukes Echinostoma malayanum , E. ilocanum and E. revolutum were found to be high in males, with 8. 3%, 8.1% and 0.8%, respectively. Minute intestinal flukes such as Hapl orchis taichui, H. pumilio, H. yokogawai, Phaneropsolus bonnei, Plagio rchis harinasutai, Prosthodendrium molenkampi and Stellantchasmus falc atus were found to be 7.8%, 6.2%, 2.9%, 15.0%, 0.7%, 19.4% and 0.3%, r espectively.