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Parasitology > Intestinal Nematodes > Flashcards

Intestinal Nematodes Flashcards

1
Q

Unholy threel

A

Hookworm spp., Ascaris lumbricoides, Trichuris trichuria

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2
Q

The infective stage of roundworms

A

Embryonated egg

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3
Q

Enzyme produced by A. lumbricoides

A

Pepsin inhibitor PI-3

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4
Q

Somatic muscle of ascaris

A

Polymarian

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5
Q

What are the soil-transmitted helminths

A
  1. S. stercoralis
  2. Hookworm spp.
    3 A. lumbricoides
  3. T. trichuria
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6
Q

What are the non-soil transmitted helminths?

A
  1. E. vermicularis
  2. C. philippinensis
  3. C. hepatica (Calodium hepaticum)
  4. C. Aerophila (Eucoleus aerophilus)
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7
Q

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

A

E. vermicularis

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8
Q

Younger stage of E. vermicularis

A

E. gregorri

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9
Q

The gold standard test for pinworm

A

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

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10
Q

Perianal itching (pruritus ani) exhibited by this parasite

A

E. vermicularis

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11
Q

Other names for Enterobius

A

Oxyuris, pinworm, society worm, threadworm

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12
Q

Secretory cells of schistosomes in C. philippinensis

A

Stichocytes

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13
Q

The infective stage of C. philippinensis

A

Filariform larvae

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14
Q

Pore-forming protein of Trichuris

A

TT47 / TT50

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15
Q

Transmission of Strongyloides

A

Skin penetration

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16
Q

Type of diarrhea in Strongyloides

A

Cochin-China diarrhea

17
Q

Characteristic unembryonated egg seen in trichuriasis

A

Barrel/ Football/ Lemon/Japanese lantern with bipolar plugs

18
Q

Mode of transmission in Ancylostoma duodenale

A
  1. Skin penetration
  2. Ingestion of L3
  3. Transmammary
  4. Transplacental
19
Q

Characteristic of the fertilized egg in hookworm spp.

A

Morula ball appearance

20
Q

Ascaris egg w/o mamillated albuminous coat

A

Decorticated

21
Q

Layers of fertilized Ascaris egg

A
  1. Mamillated albuminous coat
  2. Glycogen layer (vitelline and chitin)
  3. Lipoidal layer
  4. Germ cell
22
Q

Hookworm: Semilunar cutting plate

A

N. americanus

23
Q

True hookworm

A

N. americanus

24
Q

Hookworm: two ventral teeth

A

A. duodenale and A. braziliense

25
Q

Hookworm: two ventral, 1 dorsal teeth

A

A. caninum

26
Q

Pneumonia in ascariasis

A

Loeffler’s pneumonia

27
Q

Anemia in hookworm infections

A

IDA

28
Q

Pharyngeal itching caused by A. duodenale

A

Wakana disease

29
Q

Trichuris trichuria characteristic esophagus

A

threadlike

30
Q

Habitat of E. vermicularis

A

Large intestine

Parasitology (10 decks)

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