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Parasitology > Tissue Nematodes > Flashcards

Tissue Nematodes Flashcards

1
Q

Known as the rat lungworm

A

Parastrongylus cantonensis

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2
Q

Known to cause eosinophilic meningoencephalitis in man

A

Parastrongylus cantonensis

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3
Q

Definitive hosts of P. cantonensis

A

Rats

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4
Q

Characteristic bursa of male P. cantonensis

A

Kidney-shaped and single-lobed

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5
Q

Characteristic uterine tubules of P. cantonesis

A

Barber’s pole pattern

* Female P. cantonensis adult can lay up to 15,000 eggs/day

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6
Q

Intermediate hosts of P. cantonensis

A

Snails: Acathina fulica (giant African Snail)

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7
Q

Humans are infected with P. cantonensis in the _ stage

A

L3 (3rd stage larva when ingested infected mollusks)

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8
Q

Common pathogenesis of P. cantonensis

A
  1. Intermittent occipital / Bitemporal headache

2. Large numbers of charcot-leyden crystals in the meninges

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9
Q

Infective stage of P. cantonensis to humans

A

L3

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10
Q

Infective & Diagnostic stage of T. spiralis

A

Encysted larva

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11
Q

Second most common trichinella spp. infecting humans

A

Trichinella britovi

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12
Q

Uterus of trichinella

A

coiled

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13
Q

Characteristic larva of T. spiralis

A

Spear-like, burrowing anterior tip

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14
Q

Ingestion of raw/ insufficiently cooked meat

A

T. spiralis

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15
Q

Most definitive diagnostic examination of T. spiralis

A

Muscle biopsy (0.2-0.5 g of muscle tissue)

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16
Q

Humans are the _ host in trichinellosis

A

Dead-end host

17
Q

Female trichinella

A

Ovoviviparous (eggs will hatch before leaving the host)

18
Q

Nurse cells are found in _

A

Encysted larva

can live to 40 yrs in humans

19
Q

Another name of Dracunculus medinensis

A

Fiery serpent of the east Israelites/ Dragon worm / Medina worm/ guniea worm

20
Q

1st intermediate hose of d. medinensis

A

Copepod/ water flea (cyclops)

21
Q

Roundworm of cats and dogs

A

Toxocara cani ; T. cati

22
Q

Humans are _ hosts in toxocariasis

A

Accidental

23
Q

T/F

Fecalysis may be utilized for the detection of T. canis / catis eggs

A

False. Humans do not produce / excrete eggs of toxocara

24
Q

Nematode parasites of whales, dolphins, and other deep-marine mammals

A

Anisakis

25
Q

Consumption of raw and undercooked squid and fish containing L3

A

Anisakis

26
Q

Commonly infective species of anisakis

A
  1. Anisakis simplex

2. Psuedoterranova decipiends

27
Q

Symptoms of peptic ulcer may be confused with

A

Anisakidosis

28
Q

Tingling throat syndrome

A

Anisakidosis

29
Q

Unique morphology of Dracunculus

A

Thick cuticle and a large uterus fills the body cavity

Parasitology (10 decks)

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