Cestodes

• Name of this tapeworm - Taenia saginata

  
• beef tapeworm - common name of taenia saginata
• Taenia saginata - Quadrate scolex, with four acetabula, no hooks or a rostellum
• Infective stage of taenia saginata - cysticercus bovis
• Taenia saginata - Spherical or subspherical (30-45 um in diameter. Brownish, with a thick embryophore (striated) Inside is the oncosphere (embryo) with three pairs of hooklets(aka hexacanth embryo)
• habitat of taenia saginata - upper jejenum
• what is the intermediate host of taenia saginata - cattle
• what is the definitive host of taenia saginata - human
• Also known as pork tapeworm - taenia solium
• what is the common name for taenia solium - pork tapeworm
• Taenia solium - Spherical scolex with four acetabula (suckers), and carries a cushion like rostellum with a double crown of 25-30 large and small hooks
• Infective stage of taenia solium - Cysticercus cellulosae
• Intermediate host of taenia solium - cattle, pigs, and humans
• Definitive host of taenia solium - human
• Common name for Dipylidium caninum - Dog tapeworm, cucumber tapeworm
• Dipylidium caninum - Scolex has four suckers and armed rostellum
• Infective stage of dipylidium caninum - Cysticercus larva
• • Scolex- head (armed or unarmed)
  • Rostellum Tegument – the “skin”; important in nutrition of the worm (absorption)
  • Proglottids- series of segments
  • Strobila – the body of the tapeworm
  • Immature - empty
  • mature- reproductive organs
  • Gravid - uterus and egg
• IH of taenia saginata - cattle

  DH of taenia saginata - humans
• proglottid contains 2 lobes ovary, have 15-25 lateral branches - taenia saginata
• Proglottid contains 3 ovarian lobed, 1 accessory, have 7-13 lateral branches - taenia solium
• Taenia solium

  IH - pigs, humans

  DH - humans

  IS - cysticercus cellulosae
• taenia asiatica common name - asian tapeworm
• Scolex have rostellum, with rudementary hooklets; wart-like formations and 4 suckers - taenia asiatica
• taenia asiatica

  IH - pigs, cattle, goats, boars

  IS - cysticercus viscerotropica
• hymenolepis nana common name - dwarf tapeworm
• Hymenolepis nana ova - spherical, colorless, thin oncosphere have thin outermembrane have thick innermembrane, bipolar thickening,hair-like polarfilaments and have hooklets (6)
• Hymenolepis nana

  
• hymenolepis nana - subglobular, 4 cup size suckers, retractable rostellum, and single row or 20-30 y shaped hooklets
• H.nana

  IH - tenebrio spp or arthopods

  DH - humans

  IS - embryonated egg and cystecercoid larvae
• Hymenolepis diminuta also known as - rat tapeworm
• hymenolepis diminuta ova - bile-stained, goldenbrown, no bipolar filaments, hooks in fan-likepattern, thick outermembrane, thin inner membrane
• Hymenolepis nana scolex - rudimentary or immature unarmed rostellum
• H.nana

  DH - humans

  IH - tribolium spp. (fleas, beetles)

  IS - cystecercoid larvae
• dipylidium caninum common name - cocumber tapeworm, double pore tapeworm, dogs/cats tapeworm
• dipylidium caninum ova - Hexacanth embryo, 8-15 eggs or hexacanth embryos in just one packet
• Dipylidium caninum

  • small, globular, conical-4 deeply cupped suckers rostellum-armed w/ 1-7 rows of thorn-shaped hooklets

  
• Echinococcus granulosus common name - hydatid tapeworm
• E. granulosus larval stage - hydatid cyst
• echinococcus granulosus - Pyriform scolex, with 4 suckers and have rostellum(armed), double-crown of 30-36 hooks