Intestinal Nematodes

Question 1

Unholy threel

Answer 1

Hookworm spp., Ascaris lumbricoides, Trichuris trichuria

Question 2

The infective stage of roundworms

Answer 2

Embryonated egg

Question 3

Enzyme produced by A. lumbricoides

Answer 3

Pepsin inhibitor PI-3

Question 4

Somatic muscle of ascaris

Answer 4

Polymarian

Question 5

What are the soil-transmitted helminths

Answer 5

1. S. stercoralis
2. Hookworm spp.
   3 A. lumbricoides
3. T. trichuria

Question 6

What are the non-soil transmitted helminths?

Answer 6

1. E. vermicularis
2. C. philippinensis
3. C. hepatica (Calodium hepaticum)
4. C. Aerophila (Eucoleus aerophilus)

Question 7

Identify: D shaped egg, with triple albuminous coating, inner lipoidal membrane, and tadpole-like embryo

Answer 7

E. vermicularis

Question 8

Younger stage of E. vermicularis

Answer 8

E. gregorri

Question 9

The gold standard test for pinworm

Answer 9

Graham’s scotch adhesive tape wab (perianal cellulose tape swab)

Question 10

Perianal itching (pruritus ani) exhibited by this parasite

Answer 10

E. vermicularis

Question 11

Other names for Enterobius

Answer 11

Oxyuris, pinworm, society worm, threadworm

Question 12

Secretory cells of schistosomes in C. philippinensis

Answer 12

Stichocytes

Question 13

The infective stage of C. philippinensis

Answer 13

Filariform larvae

Question 14

Pore-forming protein of Trichuris

Answer 14

TT47 / TT50

Question 15

Transmission of Strongyloides

Answer 15

Skin penetration

Question 16

Type of diarrhea in Strongyloides

Answer 16

Cochin-China diarrhea

Question 17

Characteristic unembryonated egg seen in trichuriasis

Answer 17

Barrel/ Football/ Lemon/Japanese lantern with bipolar plugs

Question 18

Mode of transmission in Ancylostoma duodenale

Answer 18

1. Skin penetration
2. Ingestion of L3
3. Transmammary
4. Transplacental

Question 19

Characteristic of the fertilized egg in hookworm spp.

Answer 19

Morula ball appearance

Question 20

Ascaris egg w/o mamillated albuminous coat

Answer 20

Decorticated

Question 21

Layers of fertilized Ascaris egg

Answer 21

1. Mamillated albuminous coat
2. Glycogen layer (vitelline and chitin)
3. Lipoidal layer
4. Germ cell

Question 22

Hookworm: Semilunar cutting plate

Answer 22

N. americanus

Question 23

True hookworm

Answer 23

N. americanus

Question 24

Hookworm: two ventral teeth

Answer 24

A. duodenale and A. braziliense

Question 25

Hookworm: two ventral, 1 dorsal teeth

Answer 25

A. caninum

Question 26

Pneumonia in ascariasis

Answer 26

Loeffler’s pneumonia

Question 27

Anemia in hookworm infections

Answer 27

IDA

Question 28

Pharyngeal itching caused by A. duodenale

Answer 28

Wakana disease

Question 29

Trichuris trichuria characteristic esophagus

Answer 29

threadlike

Question 30

Habitat of E. vermicularis

Answer 30

Large intestine