ENTEROBIUS VERMICULARIS :- Enterobious vermicularis is a nematode and a common intestinal parasite in human. It has a round body with cylindrical ends and a complete digestive system including mouth and anus. It has separate sexes,the female is usually larger than a male. It has a worldwide distribution. E.vermicularis is a small, white round worm. Female average 10mm in length, males 3mm. It is commonly called pinworm.

1. TOPIC :- ENTEROBIUS VERMICULARIS
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2. INDEX
 INTRODUCTINO
 CLASSIFICATION
 MORPHOLOGY:-
ADULT: Female
Male
EGG
 TRANSMISSION
 LIFE CYCLE
 PATHOGENESIS
 TREATMENT
 PRIVENTION
 CONCLUSION
 REFERENCES
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3. INTRODUCTION
• Enterobious vermicularis is a nematode and a
common intestinal parasite in human.
•It has a round body with cylindrical ends and a
complete digestive system including mouth and anus.
•It has separate sexes,the female is usually larger than a
male.
•It has a worldwide distribution.
•E.vermicularis is a small, white round worm. Female
average 10mm in length, males 3mm.
• It is commonly called pinworm.
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5. CLASSIFICATION
PHYLUM :- Nematoda
CLASS :- Secernentea
ORDER :- Ascaridida
GENUS :- Enterobius
SPECIES :- Vermicularis
COMMON NAME :- Pinworm/ seatworm
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6. MORPHOLOGY
 ADULT
 FEMAL :- White 8-13mm in size .
Fusiform body with a long , thin, sharply
tapering tail. Cuticular extension of head.
The greater part of the body is occupied by
the uterus filled with eggs.
MALE :- Like female, but about 1/3 to 1/2 size of
female
The tail is curved, it is rarely seen.
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8.  EGG
• Oval, clear and colorless.
• 50 to 60 µm in length, thick shell.
• Flattened on one side.
• Contains a larva.
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9. TRANSMISSION
 DEFINITIVE HOST :-
HUMAN
 TRANSMITTED BY :-
INGESTING ENTEROBIUS EGGS
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10. LIFE CYCLE
•E.Vermicularis is an organism that primarily lives in
ileum and cecum.
•Once E.vermicularis eggs are ingested, they take
about 1 to 2 months to develop into adult worm
which happens in the small intestine.
•The female adult worms and ova migrate to the anal
area mostly at night time and deposit thousands of
eggs in the prianal area.
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11. •This migration causes a lot of itching and pruritus.
•Eggs hatch near the anal area causing itching,
scratching and this causes prianal pruritus.
•This leads to contamination of the fingers and results
in ingestion of the eggs (autoinfection) and restarting
of the life cycle of worm.
•Occasionally, the larvae migrate back into the rectum
and to the small intestine and begin the life cycle(retro
infection).
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14. PATHOGENESIS
•Enterobiasis is the medical condition of being infection
with pinworm.
•Asymptomatic other than itching of the anus, due to
excretions of the female worm.
•Children may experience loss of appetite, abdominal
pain, insomnia and restlessness are the usual symptoms
associated with pin worm infections.
•Virginities may occur in young girls with pinworm
infections.
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15. TREATMENT
Treatment consist of the following antihelminthic
medication:
 ALBENDAZOL: Given on an empty stomach, a 400mg,
one-time dose followed by a repeat dose in 2 weeks.
MEBENDAZOLE: A 100mg, one-time dose followed by
a repeat dose in two weeks.
Other medications which have been used to treat
enterobiasis are ivermectin and piperazine, although
the latter has lower efficacy and higher toxicity.
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16. PREVENTION
•Washing hands regularly, particularly before
eating, after changing diapers.
•Taking a bath early in the morning to prevent egg
contamination should be encouraged in at-risk
patients.
•Trimming of fingernails should be encouraged.
•Children should be advised to avoid sucking their
fingers and touching their perianal area.
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17. CONCLUSION
•Enterobiasis is a commonly encountered problem in
family practice. School age children show the highest
incidence of infection, though both adults and younger
children may have enterobiasis.
• The commonest symptom in older children and adults
is pruritis ani, but in young children the condition may
present only as a non-specific disturbance in sleep
pattern.
• Though usually susceptible to drug therapy, an
appreciation of the particulars of the parasites life cycle
is important in preventing recurrence of infection.
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18. REFERENCES
 PARASITOLOGY
(Protozoology and Helminthology) BY :-
K.D. CHATTERJEE
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