Enterobius vermicularis

Question 1

Common Name

Answer 1

• Seatworm
• Pinworm
• Society worm
• “Tiwa”

Question 2

Other Name

Answer 2

Oxyuris Vermicularis

Question 3

Final Host

Answer 3

Humans

Question 4

Infective Stage

Answer 4

Embryonated Egg

Question 5

Habitat

Answer 5

Large Intestine

Question 6

Epidemiology

Answer 6

Considered as most common nematode
infection in the world

Question 7

Shape

Answer 7

Spindle-shaped

Question 8

Tails

Answer 8

Males have curve tails; have a spicule Females have pointed tails

Question 9

Notable Parts

Answer 9

It has cephalic alae

Question 10

a wing-like structure

Answer 10

cephalic alae

Question 11

on its anterior portion that is used during migration

Answer 11

cephalic alae

Question 12

Shape of Eggs

Answer 12

D shaped / lopsided / football shaped
(flattened one side)

Question 13

Egg Production

Answer 13

Approx. 11,000 eggs per day

Question 14

Eggs Structure

Answer 14

It has 2 layers:
- Outer albuminous
layer
- Inner lipodial layer

Inside is a tadpole looking larva

Question 15

Embryonation

Answer 15

After 4-6 hours

Question 16

MOT

Answer 16

Oral, Air-borne, Retroinfection,
Autoinfection

Question 17

Enterobius vermicularis : Life Cycle

There are different ways we get the infection but primarily, main mode of transmission is ____________

Answer 17

Ingestion of eggs

Question 18

Enterobius vermicularis : Life Cycle

After ingesting, it would hatch and release larva in the _________ and they will find its way to the ______ and become adults.

Answer 18

• small intestine
• large intestine

Question 19

Enterobius vermicularis : Life Cycle

The gravid female would travel from large intestine to the _________ to lay eggs

Answer 19

perianal area

Question 20

Enterobius vermicularis : Life Cycle

The female migrates during the _____ to lay eggs

Answer 20

night

Question 21

v

They will ___ after laying eggss

Answer 21

die

Question 22

Enterobius vermicularis : Life Cycle

Within _____ hours in the perianal area, they will already be embryonated and mature

Answer 22

4 to 6

Question 23

Enterobius vermicularis : Life Cycle

Within the eggs are the tadpole-like larvae and are considered as _____

Answer 23

L1 larva

Question 24

Enterobius vermicularis : Life Cycle

Eggs can be found in the _______ where
the child is sleeping

Answer 24

bed sheets

Question 25

# Enterobius vermicularis : Life Cycle There is also a possibility of ________ when cleaning the bed of an infected person if the eggs are suspended in the air.

Answer 25

inhalation

Question 26

# Enterobius vermicularis : Life Cycle _______ is another mode of infection in which case the larva hatched in the perianal area and will go back into the anus and be infected again by the parasite.

Answer 26

Retrofection

Question 27

# Enterobius vermicularis: Pathology Disease caused

Answer 27

Enterobius vermicularis: Pathology

Question 28

# Enterobius vermicularis : Life Cycle In autoinfection, one symptoms is _____________ which causes the infected to scratch their butt and eggs can be found between the nails infecting themselves or other.

Answer 28

nocturnal pruritus ani

Question 29

# Enterobius vermicularis: Pathology Patients experience:

Answer 29

Nocturnal Pruritus Ani ○ Insomnia ○ Secondary Bacterial infection ○ Loss of Appetite, ○ Abdominal Pain ○ Vulvovaginitis ○ Appendicitis. ○ Ectopic deposition of the eggs

Question 30

# Enterobius vermicularis: Pathology (eggs can be found in the vagina and cause inflammation)

Answer 30

Vulvovaginitis

Question 31

# Enterobius vermicularis: Pathology In some rare cases, the eggs can be deposited not in the perianal area but in the ______ or _____

Answer 31

lungs or liver

Question 32

# Enterobius vermicularis: Pathology If one is infected in the family, best course of treatment is to treat __________ in the Family

Answer 32

everyone

Question 33

# Enterobius vermicularis: Treatment First drug of choice

Answer 33

Mebendazole

Question 34

Second drug of choice

Answer 34

- Albendazole - Pyrantel Pamoate

Question 35

# Enterobius vermicularis: Diagnosis __________ is not recommended due to low recovery rate (only about 5%)

Answer 35

Stool examination

Question 36

Commonly used:

Answer 36

Scotch tape Swab/Cellophane Anal Swab/NIH Swab

Question 37

Other method of collection:

Answer 37

- Swellengrebel - Graham’s technique - Petrolatum

Question 38

Collection should be done early in the morning before ______ and ________

Answer 38

defecating and taking a bath

Question 39

Collect the specimen wearing ____

Answer 39

PPE

Question 40

Use of scotch tape or cellulose acetate with a tongue depressor or slide

Answer 40

Scotch tape swab

Question 41

Use of scotch tape with a tongue depressor

Answer 41

Graham’s technique

Question 42

Use of moisten pestle. Pestle is slowly rolled on the perianal area, and the eggs will adhere to the moisten pestle

Answer 42

Swellengrebel technique

Question 43

Use of a glass-rod; wherein on top has a cellophane paper (clear-type)

Answer 43

NIH swab

Question 44

The _______ is applied to the perianal area - rolled on the area to collect the eggs and examine under the microscope. | NIH swab

Answer 44

cellophane part

Question 45

You can put it on a test tube.

Answer 45

NIH swab

Question 46

Based on the guidelines, at least __ negative (-) NIH swabs should be done before reporting it as negative

Answer 46

7

Question 47

# Enterobius vermicularis : Epidemiology More common among females(Locally)

Answer 47

Cosmopolitan

Question 48

Cannot be controlled by _____________

Answer 48

sanitary disposal of waste