Intro To Nematodes

Question 0

Nematode have this body cavity with no cell lining

Answer 0

Pseudocoelom

Question 1

False about nematodes
A. Unsegmented sila
B. Bilaterally symmetrical
C. Incomplete digestive tract
D. Separate sexes only at adulthood
E. Gas exchange happens via diffusion

Answer 1

C. Complete kasi digestive tract nila

Question 2

Fluid inside pseudocoelom of nematodes, aids in movement along musculature

Answer 2

Hemolymph

Question 3

Nematodes excrete waste thru this hole

Answer 3

Excretory pore

Question 4

Female nematodes only have one uterus. True or false?

Answer 4

False, they have a pair of uteri

Question 5

Glycogen is the main storage polysaccharide of nematodes. True or false?

Answer 5

True

Question 6

Which is false?
A. Male roundworms are bigger than female roundworms
B. Most worms do not replicate
C. Both of the above
D. None of the above

Answer 6

A. Male roundworms are bigger than female roundworms

Baliktad!

Question 7

Enumerate two specific ways to transmit soil-transmitted helminths

Answer 7

Ingestion of embryonated eggs

Penetration of skin

Question 8

Scientific name of giant intestinal roundworm

Answer 8

Ascaris lumbricoides

Question 9

Which is false about Ascaris lumbricoides?
A. It is endemic in the Philippines
B.it is the most common intestinal nematode
C. Adult females are ventrally curves with two spicules
D. It has a stage of lung migration, which symptoms manifest after 9-12 days

Answer 9

C. Adult females are ventrally curves with two spicules

Question 10

Infective stage of Ascaris lumbricoides?

Answer 10

Embryonated egg

Question 11

Diagnostic stage of Ascaris lumbricoides?

Answer 11

Fertilized egg

Question 12

Which of the following drugs can treat infection caused by Ascaris lumbricoides?
A. Albendazole
B. Mebendazole
C. Pyrantel pamoate
D. All of the above

Answer 12

D. All of the above

Question 13

Trichuris trichura is also known as the 
A. Hookworm
B. Earthworm
C. Whipworm
D. All of the above

Answer 13

C. Whipworm

Question 14

Adult whipworms may live at this specific part of the GI tract

Answer 14

Cecum (large intestine)

Question 15

Infective stage of Trichuris trichura

Answer 15

Embryonated egg

Question 16

In Trichuris trichura, what is the spicule for?

Answer 16

Reproduction

Question 17

Striking feature of Trichuris trichura egg
A. Thick wall
B. Golden brown
C. Bipolar plug
D. All of the above

Answer 17

C. Bipolar plug

Question 18

Which can treat infections caused by Trichuris trichura?
A. Albendazole
B. Mebendazole
C. Both of the above
D. None of the above

Answer 18

C. None of the above

Question 19

Ascaris lumbricoides can live for how long?

Answer 19

1yr

Question 20

Trichuris trichura can live for how long?

Answer 20

5 years

Question 21

Enumerate three layers of nematode’s body cavity wall

Answer 21

Outer cuticle
Hypodermis
Musculature

Question 22

True or false. Male germ cells develop in spicules (for hookworms)

Answer 22

False. Testis pa rin.

Question 23

Components of nematodes’ nervous system: enumerate

Answer 23

Papillae
Amphids (anterior)
Phasmids (posterior)

Question 24

Can nematodes produce their own lipids?

Answer 24

No

Question 25

Which nematodes transmit infection via ingestion of embryonated eggs?

Answer 25

Ascaris lumbricoides | Trichuris trichuria

Question 26

Which nematodes transmit infection via penetration of skin?

Answer 26

Hookworm | Strongyloides stercoralis

Question 27

Sequence these steps of Ascaris life cycle A)worm penetrates blood vessels B)fertilized eggs in feces become embryonated C)worm goes into lung migration D)worm goes to trachea then esophagus E)embryonated eggs are swallowed F)worm at intestine as adult (if female, lays eggs) G)embryonated eggs hatch

Answer 27

B E G A C D F B

Question 28

Pulmonary symptoms only manifest 9-12 days after egg ingestion, true or false?

Answer 28

True

Question 29

Fertilized Ascaris eggs have mammilations and refractive granules; they are also decorticate and with thick shell. True or false?

Answer 29

False. Unfertilized dapat. Fertilized ones have dividing cell mass

Question 30

Which is false? A. Trichuris esophagus at anterior 3/5 B. GI, GU tract at posterior 2/5 C. Adults live in rectum

Answer 30

C. Adults live in rectum Cecum and ascending colon dapat

Question 31

Sequence these steps of Ascaris life cycle A) eggs become embryonated & infective B)unembryonated eggs passed at stool C) advance cleavage stage at soil D) 2 cell stage E)embryonated eggs are swallowed F)adult egg lie in cecum/ascending colon, lay eggs G)embryonated eggs hatches at small intestine

Answer 31

B C D A E G F B

Question 32

When does the Trichuris female begin to deposit eggs?

Answer 32

60-70 days after infection

Question 33

Purpose of Kato Thick smear

Answer 33

If positive/negative infection

Question 34

Kato-Katz purpose

Answer 34

Quantify burden of parasites