Echinococcus Flashcards
Echinococcus granulosus causes:
unilocular echinococcosis or ___
hydatid disease
False about Echinococcus granulosus
A. Common in tropical countries
B. Common where sheep or cattle raising is common
C. in the Philippines, goats can be infected
D. humans are an accidental host
A
False about Echinococcus granulosus A. Smallest tapeworm of humans B. Exhibits sexual dimorphism C. Scolex has four cup-like suckers D. Three segments: immature, mature and gravid
B
they are hermaphroditic
initial way of transmitting Echinococcus granulosus
Gravid segment ruptures to release eggs
Echinococcus egg can’t be differentiated from \_\_\_ eggs A. Trichuris B. Hymenolepis C. Taenia D. Capillaria
C
larval form of Echinococcus granulosus
hydatid cyst
The two layers of hydatid cyst are the ectocyst and endocyst. In which layer is the brood capsule found?
endocyst
In the cyst, where are the protoscolices found?
brood capsule
When the brood capsule’s contents are freed into the cystic cavity, what is this called?
hydatid cyst
Which is false?
A. Hydatid cysts formed through central vesiculation which
gradually enlarge
B. Development completed when cysts in tissues are
ingested by host
C. Protoscolices evaginate and attach to the liver to become adults
D. none of the above
C
intestinal wall, not liver
Identify the process
Formation of the cestode through transverse fission asexual reproduction by segmentation
strobilization
T or F
Humans play a role in their biological cycle as the
cysts progress in them to become adult tapeworms
F
When ingested, hydatid cysts get lodged in diff organs, but do not progress
another name for Echinococcus egg
Hexacanth embryo
Unilocular cyst in bones called___ –>
bone erosion and pathological fractures
osseous hydatid cyst
Rupture of the cyst may produce serious allergic or
anaphylactic reactions.
T or F?
T
