15. Echinococcosis (hydatidosis) Flashcards
(23 cards)
What is the causative agent of echinococcosis?
Echinococcus granulosus
Echinococcosis is also known as hydatidosis.
What class does Echinococcus granulosus belong to?
Cestoda
What are the definitive hosts (FH) for Echinococcus granulosus?
Dog, wolf, jackal
What are the intermediate hosts (IH) for Echinococcus granulosus?
Ru, eq, pig, man
Where does Echinococcus granulosus locate in the host?
Lung, liver, heart, brain, bone marrow
What is the size range of Echinococcus granulosus?
2-7mm
Describe the morphology of Echinococcus granulosus.
scolex with 4 suckers, rostellum with 2 rows with 28-60 hooks, 3-4 proglottids
Where is the genital pore located in Echinococcus granulosus?
Back of the last proglottid
What is the life cycle initiation of Echinococcus granulosus?
Gravid proglottids release eggs that are passed in feces
What happens after intermediate hosts ingest the eggs of Echinococcus granulosus?
Eggs hatch in the SI, releasing a six-hooked oncosphere that penetrates the intestinal wall and migrates to various organs
What does the oncosphere of echinococcus granulosus develop into in the intermediate host?
Hydatid cyst
How does the definitive host get infected with Echinococcus granulosus?
By ingesting cyst-containing organs from the intermediate host
What occurs after the definitive host ingests the cyst (of echinococcus granulosus)?
Protoscolices evaginate and attach to the intestinal mucosa, developing into an adult
What is the time frame for the adult Echinococcus granulosus to develop after ingestion?
32-80 days
How do humans become infected with Echinococcus granulosus?
By ingesting eggs
What are the symptoms of hepatic involvement in echinococcosis?
Abdominal pain, obstruction
What are the symptoms of pulmonary involvement in echinococcosis?
Chest pain, cough
What symptoms can occur if a hydatid cyst ruptures?
Fever, urticaria, anaphylactic shock
What are the primary treatment options for echinococcosis?
Surgery and Albendazole
What methods are used for the control of echinococcosis?
Praziquantel for dogs, vaccination, health education, surveillance of dogs and humans
What is a diagnostic method for echinococcosis?
Flotation method, serological tests, antibody detection
What is required for highly infectious material related to echinococcosis?
It must be frozen for 7 days at -80 degrees
True or False: Echinococcosis can remain silent for years before causing symptoms.
True
