摘要： Dogs infected with Paragonimus westermani were given intragastrically with pyquiton at a singledose of 150 mg/kg 3 months after infection.The adult worms taken from the lungs of dogs at 1.6,12,24,36,2nd 48 h after medication were examined with histochemical methods. 1-6 h after medication,no obvious changes were found.12-48 h after medication,there was a