eg. Taenia ovis worm in gut of final host (dog) egg packet voided CESTODES TYPICAL MODE OF LIFE OF TAPEWORMS eg. Taenia ovis worm in gut of final host (dog) egg packet voided onto pasture larva in gut of intermediate host (sheep) migrates to muscle dog eats infected meat

gravid proglottid full of eggs >> detaches from strobila ovary CESTODES STRUCTURE OF ADULT CESTODES hooks sucker neck produces proglottids gravid proglottid full of eggs >> detaches from strobila ovary vitelline gland testes uterus genital pore tape is called the strobila head is called the scolex

invaginated scolex COENURUS CYSTICERCUS fluid filled cyst HEXACANTH CESTODES STRUCTURE OF LARVAL CESTODES invaginated scolex COENURUS CYSTICERCUS fluid filled cyst HEXACANTH first stage in all types endogenous cyst HYDATID CYSTICERCOID STROBILOCERCUS

eg. Taenia solium human final host contamination of human food with CESTODES TAENIA CESTODES AND CYSTICERCOSIS eg. Taenia solium human final host cysticerci in pig intermediate host eating pork completes usual cycle contamination of human food with human faeces gives human cysticercosis

Human zoonotic infection with hydatid via dog faeces CESTODES ECHINOCOCCUS & HYDATID DISEASE fox or dog final host Human zoonotic infection with hydatid via dog faeces hydatid cyst in intermediate host rodent intermediate host for E.multilocularis (ruminants & horses intermediate hosts for E.granulosus )

INTERMEDIATE HOSTS, eg. Dipylidium caninum CESTODES CESTODES WITH ARTHROPODS AS INTERMEDIATE HOSTS, eg. Dipylidium caninum dog or cat final host egg packet ingested by larval flea as intermediate host larval flea metamorphoses to adult and retains infection dog grooms and eats flea to complete life cycle larval cestode develops to cysticercoid in flea