Enterobius vermicularis Flashcards
(37 cards)
common name of enterobius vermicularis
human pin worm or seat worm
order
oxyurida
esophagus with
prominent, valved posterior bulbs
males are rarely seen because of what reason
they die after copulation
has posterior esophageal bulb and long, slender pointed tail
adult female
size of rhabditiform larvae
140 to 150 um by 10 um
characteristic of rhabditiform larvae
esophageal bulb with pointed posterior end
does rhabditiform larvae has a cuticular cephalic alae
no
shape of eggs
symmetrical, elongated-oval
one side is flattened and the other side is convex
d-shaped
size of eggs
50 to 60 um by 20 to 30 um
characteristic when shed
partially embryonated
inner embryonic lipoidal membrane
for chemical protection
outer triple albuminous covering
mechanical protection
infective stage
embryonated eggs
where does infection starts
ingestion of embryonated eggs
type of transmission
hand to oral
goes into stomach until it releases what
rhabditiform larva
where is the rhabditiform larva released
duodenum (small intestine)
movies into ___________ and in the areas of large intestine
cecum
develops into adults in
2-5 weeks
where does female adults migrate
perianal, perineal
in how many hours does eggs become embryonated?
4-6 hours
adult worms are found where
lower ileum and cecum
