copepod that is the first intermediate host. Finally, the infective larval stage (a
plerocercoid) developes and encysts in the tissues of the fish. In the life cycle of most
tapeworms the infective larval stages attach to the small intestine and become adults
when man consumes the improperly prepared flesh of the various intermediate hosts.
Figure 2-15. Tapeworm.
HOST
CESTODE
COMMON NAME
INTERMEDIATE
DEFINITIVE
Taeniarhynchus saginatus
Beef tapeworm
Cattle
Man
Taenia solium
Pork tapeworm
Pig
Man
Echinococcus granulosus
Dog tapeworm
Man, Sheep
Dog,
hog, cattle
Diphyllobothrium latum
Fish tapeworm
Crustacean, fish
Man, cat,
bear, dog
Hymenolepis nana
Dwarf tapeworm
Not necessary
Man
Principal cestodes affecting man.
Table 2-8.
MD0151
2-35