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13 Cards in this Set

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How many hosts do cestodes have? What is ingested by the intermediate host?
How is the definitive host infected?
Two- intermediate & definitive
Eggs
Ingestion of the infected intermediate host
Which host in general displays more clinical signs?
Why?
Intermediate
Make weak, easier for definitive host to catch and complete life cycle
In which tapes are humans are the definitive host?
Which are humans intermediate hosts?
Beef, *pork, dog and fish
Echinococcus and *pork tape
What are the signs in humans when they are the definitive host of tapes?
Usually mild GI
In heavy infestations can cause obstructions
What is the main sign when humans serve as the intermediate host to Taenia solium?
What kind of infection is possible in humans?
Neurocystercercosis
Auto infection (from themselves)
What is the best way to control Taeniasis?
Human sanitation and meat inspection (only 50% effective)
Which species of Echinococcus has hydatid cysts that are individual and large and often found in the liver?
E. granulosis
Which species of Echinococcus has alveolar cysts that are multilocular and small and often found in the liver and can metastasize to lungs?
E. multilocularis
What are the reservoirs for Echinococcus?
Who serves as the natural intermediate host?
All canids
Their prey, often sheep
How are humans infected by Ehinococcus?
Where from?
Can humans eat infected meat safely?
Ingestion of eggs
Canid feces
Yes
What is the best way to treat Echinococcosis?
De-worm with praziquantel
Why are cestodes a neglected problem?
-Occurs in poor countries/areas
-Difficult and expensive to diagnosis
-Lack of treatment options
What are the clinical signs in intermediate hosts?
symptoms are according to which organ/system is affected
anaphylactic symptom follow rupture of cysts