Intestinal Nematodes Enterobius Vermicularis Flashcards
Common name
Pinworm
Seatworm
Also known as
Oxyuris vermicularis
Adult form
Lack true buccal
3 lips
Dorsoventral bladder
Esophageal bulb
Adult female
Cuticular alar expansion Esophageal bulb Uterus distented eggs Spindle shape sharply pointed posterior Vulva us mid ventral
Adult male
Curved tail
Spindle shape, curved ventrally posterior
Rhabditiform larva
Esophageal bulb but has no cuticular expansion on anterior end
Eggs
Asymmetrical
One side flat, one side convex
Embryonic lipoidal membrane
What is the shape of the egg?
Planoconvex
The shellhas how many layers
2
Outside the host, eggs become infective in?
4-6 hours
Ovum develops into
Tadpole like embryo
Adult worms are found
Cecum and lower
Average lays
11,105 eggs
Eggs become fully embryonated within
6 hours
3rd stage larvae hatch
Duodenum
Egg may remain viable for
13 days
Intense itching due to migration of
Egg laying
Insomnia due to
Pruritus
Diagnosis
Scoth ashesive tape swab
Peranal itching
Treatment
Mebendazole 500 mg chewable tablet, single dose
Pyrantel, 10 mg/kg with second dose pf 2-3 weeks later