Cestodes

• Cestodes - are class under the subkingdom Metazoa, phylum Platyhelminthes.
• Tegument - tapeworms absorb nutrients and eliminate waste products through their outer surface.
• Tapeworm - what kind of worm are cestodes?
• Scolex - an organ of attachment to the head.
• Rostellum - a fleshy extension of scolex
• Proglottids - body is divided into multiple segments called?
• Strobila - a series of proglottids
• All cestodes are hermaphroditic (self-fertlizing).
• Pregnant proglottid is also called Gravid segment
• Oncosphere - the first larval or motile stage.
• Intermediate hosts of cestodes are cattles, pig, or fish.
• Taenia saginata - Beef tapeworm
• Taenia saginata intermediate host is cattle.
• These beef tapeworms are known to achieve a length of as much as 10 meters.
• Taeniasis - a disease causes by Taenia saginata.
• The infective larva of Taenia saginata is cysticercus.
• Treatment for Taeniasis is praziquantel.
• Taenia saginata is acquired through ingestion of raw or undercooked beef.
• Taenia solium is acquired through ingestion of improperly cooked pork meat.
• Taenia solium - Pork tapeworm
• infective larva of T. solium is cysticercus cellulosae.
• Cysticercosis - disease caused by T. solium.
• Cysticercosis causes neurocysticercosis, uveitis, retinitis.
• Treatment for T. solium is Praziquantel.
• Diphyllobothrium latum - Broad Fish Tapeworm.
• D. latum can reach a length of about 13 meters.
• infective stage of D. latum is plecocercoid.
• Diphyllobothriasis - disease caused by D. latum.
• Treatment for Diphyllobothriasis is Praziquantel and alternative drug is Niclosamide.
• Hymenolepis nana - Dwarf Tapeworm
• what tapeworm doesn’t need an intermediate host?

  Hymenolepis nana
• what tapeworm is the only extra-intestinal cestode?

  Echinococcus granulosus
• This tapeworm has the dog as the intermediate host?

  Echinococcus granulosus
• Diseases for E. granulosus?

  Echinococcosis

  Hydatid Cyst Disease

  Hydatid Disease

  Hydatidosis