CESTODES

• ANAPHYLACTIC SHOCK

  A severe allergic response that may develop in

  persons infected with E. granulosus

  (Echinococcosis)

  It produces large amounts of histamine and

  other chemical mediators and may be fatal
• CORACIDIUM

  Ciliated larval stage of Diphyllobothrium latum;

  Consists of a hexacanth embryo that develops from

  the egg stage and hatches when the egg is exposed

  to freshwater
• CYSTICERCOID

  INFECTIVE stage to both humans and rodents that may develop in animal transport hosts, such as fleas, beetles, rats, and house mice
• CYSTICERCUS LARVA

  Type of larva that consists of a scolex surrounded by a bladder-like, thin walled cyst that is filled with fluid
• DAUGHTER CYST

  Referred to miniaturizations of the entire hydatid cyst that may occur within the cyst
• EMBRYOPHORE

  Yellow-brown shell present on select tapeworm eggs surrounding an embryo
• HERMAPHRODITIC (Self-Fertilizing)

  Ingestion of a single egg of tapeworms that will usually initiate a new life cycle
• OPERCULUM

  LID structure that consumes one end of the egg
• PLATYHELMINTHES

  Members of the class Cestoda belong to the phylum that also contains the flukes
• PLEUROCERCOID

  Precursor larval stage that is ingested whe consuming contaminated freshwater fish that is raw or undercooked
• PROCERCOID

  Larval stage in D. latum development, occurs in the copepod
• PROGLOTTID

  Individual segments that in their mature form are equipped with both male and female reproductive organs
• ROSTELLUM

  A fleshy extension of the scolex present in some species, from which one or two rows of hooks might be present
• SCOLEX

  Once fully developed, has the capability of developing into an adult worm when present in the definitive host

  Anterior end of a tapeworm
• SPARGANOSIS

  Condition results from ingesting the procercoid larvae of D. latum as well as that of other related Diphyllobothrium species
• SPARGANUM

  Infected subcutaneous tissue often described as white, wrinkled, and ribbon-shaped
• STROBILA

  Series of proglottids

  Term used to denote the entire tapeworm body
• HEXACANTH EMBRYO

  The motile, first larval stage characterized by the presence of six small
• HOOKLETS

  Believed to pierce the intestinal wall of the infected host which are arranged in pairs
• HYDATID CYST

  A fluid that may be examined on biopsy samples

  Found in human tissue consisting several structures
• HYDATID SAND

  Components found in the fluid of older E. granulosus cysts that typically include daughter cysts, free scolices, hooklets, and miscellaneous

  nondescript material
• ONCOSPHERE

  Migrates via the blood to the animal tissue and converts into the infective cysticercus larval stage
• SUCKERS

  Typical scolex contains four cup-shaped structurest that provide the worm with the ability to attach to the intestinal mucosa of the infected host
• TEGUMENT

  Absorbing nutrients and excrete waste products through their outer surface
• VISCERA

  Soft parts and internal organs of major cavities in the body
• ZOONOSIS (Also Known As A Zoonotic Occurrence)

  An accidental parasitic disease that normally infects animals but can also infect humans
• ZOONOTIC

  Parasitic disease that normally infects animals and that may also infect humans
• TAENIA SAGINATA → BEEF Tapeworm
• TAENIA SOLIUM → PORK Tapeworm
• HYMENOLEPIS NANA

  Dwarf tapeworm

  ➔ The smallest cestode to infect human intestine

  ➔ Most common cestode in human
• DIPYLIDIUM CANINUM

  Dog or cat tapeworm

  Pumpkin seed tapeworm
• DIPHYLLOBOTHRIUM LATUM

  Broad Fish Tapeworm

  Russian Broad Tapeworm
• DIPHYLLOBOTHRIUM LATUM Causes Vitamin B12 Deficiency
• DIPHYLLOBOTHRIUM LATUM

  Infective Stage to: Man → Plerocercoid

  Infective Stage to 1st IH → Procercoid

  Infective Stage to 2nd IH → Coracidium
• DIPHYLLOBOTHRIUM LATUM

  Definitive Host: Man

  1st Intermediate Host: Cyclops

  2nd Intermediate Host: Freshwater fish
• DIPHYLLOBOTHRIASIS: Ingestion of Plerocercoid by Man can lead to infection
• SPARGANOSIS: Accidental ingestion of Procercoid by man can also lead to an infection