Tissue Nematodes

Question 1

Known as the rat lungworm

Answer 1

Parastrongylus cantonensis

Question 2

Known to cause eosinophilic meningoencephalitis in man

Answer 2

Parastrongylus cantonensis

Question 3

Definitive hosts of P. cantonensis

Answer 3

Rats

Question 4

Characteristic bursa of male P. cantonensis

Answer 4

Kidney-shaped and single-lobed

Question 5

Characteristic uterine tubules of P. cantonesis

Answer 5

Barber’s pole pattern

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

Question 6

Intermediate hosts of P. cantonensis

Answer 6

Snails: Acathina fulica (giant African Snail)

Question 7

Humans are infected with P. cantonensis in the _ stage

Answer 7

L3 (3rd stage larva when ingested infected mollusks)

Question 8

Common pathogenesis of P. cantonensis

Answer 8

1. Intermittent occipital / Bitemporal headache

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

Question 9

Infective stage of P. cantonensis to humans

Answer 9

L3

Question 10

Infective & Diagnostic stage of T. spiralis

Answer 10

Encysted larva

Question 11

Second most common trichinella spp. infecting humans

Answer 11

Trichinella britovi

Question 12

Uterus of trichinella

Answer 12

coiled

Question 13

Characteristic larva of T. spiralis

Answer 13

Spear-like, burrowing anterior tip

Question 14

Ingestion of raw/ insufficiently cooked meat

Answer 14

T. spiralis

Question 15

Most definitive diagnostic examination of T. spiralis

Answer 15

Muscle biopsy (0.2-0.5 g of muscle tissue)

Question 16

Humans are the _ host in trichinellosis

Answer 16

Dead-end host

Question 17

Female trichinella

Answer 17

Ovoviviparous (eggs will hatch before leaving the host)

Question 18

Nurse cells are found in _

Answer 18

Encysted larva

can live to 40 yrs in humans

Question 19

Another name of Dracunculus medinensis

Answer 19

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

Question 20

1st intermediate hose of d. medinensis

Answer 20

Copepod/ water flea (cyclops)

Question 21

Roundworm of cats and dogs

Answer 21

Toxocara cani ; T. cati

Question 22

Humans are _ hosts in toxocariasis

Answer 22

Accidental

Question 23

T/F

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

Answer 23

False. Humans do not produce / excrete eggs of toxocara

Question 24

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

Answer 24

Anisakis

Question 25

Consumption of raw and undercooked squid and fish containing L3

Answer 25

Anisakis

Question 26

Commonly infective species of anisakis

Answer 26

1. Anisakis simplex

2. Psuedoterranova decipiends

Question 27

Symptoms of peptic ulcer may be confused with

Answer 27

Anisakidosis

Question 28

Tingling throat syndrome

Answer 28

Anisakidosis

Question 29

Unique morphology of Dracunculus

Answer 29

Thick cuticle and a large uterus fills the body cavity