intestinal tape worms - Hymenolepsis spp Flashcards
H. nana AKA
Dwarf tape worm
Scolex
1 circle 30 hooks
Hymenolepsis is apolytic or anapolytic?
Anapolytic
Intermediate host
beetle
infected beetle is consumed by
a mammal host
oncosphere hatches in duodenum and imbeds in the villi
In the villi:
oncosphere develops into cercocystis
____ emerges from ______ to the _____
cercocystis
villi
lumen where it becomes an adult
Infective stage of nana:
Eggs
in nana ______ is _____
intermediate host, optional
______ can aggravate infection
auto infection
I heavy infections
Hymenolepiasis casues enteritis
Dx
eggs in feces
Diminuta vs Nana
D: lacks hooks, larger, 2nd int host required
N: with hooks, smaller, 2nd int host optional, autoinfection
Diminuta intermediate host
arthropods
Diminuta cause for infection
stored-grain beetle