the fine structure of the tegument of three trematode species , schistosoma mansoni , dicrocoelium dendriticum , and fasciola hepatica , was studied by means of light scanning ( sem ) and transmission electron microscopy ( tem ) after in vitro exposure to 0 , 1 , 10 , and 100 micrograms/ml of the anthelmintic praziquantel for 5 , 15 , 30 , and 60 min .
C0003158
anthelmintic
C0032911
praziquantel