Cestodes

• Cysticercosis - larval stage of Taenia solium, found in muscles or brain tissue
• Hymenolepis diminuta


  rat tapeworm
• Hymenolepis nana 


  dwarf tapeworm
• Taenia solium

  pork tapeworm
• Taenia saginata


  beef tapeworm
• Dipylidium caninum


  cats and dogs tapeworm
• Diphyllobothrium latum


  broad fish tapeworm
• Echinococcus species


  Echinoccus granulosus, Echinococcus multicularis, Echinococcus vogeli, Echinococcus olgarithrus
• Basic Parts

  scolex, neck, strobila
• 3 Types of Proglottids

  mature, immature, gravid
• Echinococcus granulosus


  hyatid tapeworm
• classification of cestodes

  pseudophyllidea, cyclophyllidea
• Pseudophyllidea tapeworms

  spatulate scolex, bothria
• Cyclophyllidea tapeworms


  globular with four muscular suckers
• T.saginata

  ingestion of egg by cattle
• T.solium


  ingestion of eggs by pigs/hogs
• Cestodes


  tapeworms
• Neurocysticercosis 


  parenchymal, extraparenchymal
• Pseudophyllidean (CPP)


  Coracidium, Procercoid, Plerocercoid
• Cyclophyllidean (CCH)


  Cysticercoid, Cysticercus, Hyatid
• Spirometra species 


  Spirometra mansoni, Spirometra erinacei, Spirometra ranarum
• Mature Proglottid


  male organ; appear first
• Gravid Proglottid


  fertilized; segmented
• Hymenolepis nana


  ingestion of embryonated eggs
• Diphyllobothrium latum


  unembryonated eggs; in feces
• Taenia solium


  IS: cysticercus cellulosae
• Taenia saginata


  IS: cysticercus bovis
• Cysticercus viscerotropica


  Infective Stage of Taenia asiatica; liver
• Taenia asiatica 


  parasite related to T.saginata
• Hymenolepis nana


  most common tapeworm
• General Characteristic of Cestodes

  dorsoventrally flattened, bilateral symmetry, segmented with ribbon-like, no digestive system; HERMAPHRODITIC
• General Characteristic of Cestodes

  dorsoventrally flattened, bilateral symmetry, segmented with ribbon-like, no digestive system; HERMAPHRODITIC
• Scolex


  head; main organ of attachment
• Neck 


  segmentation; area of growth
• Strobila 


  body; trunk
• T.solium


  under go to apolysis
• Raillietina garrisoni


  cysticercoid type
• Intestinal Cestodes (Adult Worm) > DTHD

  Diphyllobothrium spp, Taenia solium, Taenia saginata, Dipylidium spp
• Somatic/Tissue Cestodes


  Taenia solium (cysticercosis), Taenia multiceps, Echinococcus spp, Spirometra spp
• Hymenolepis nana


  Eggs: spherical/subspherica; colorless