TISSUE NEMATODES

Question 1

(8) Recognizable species of Trichinella

Answer 1

Trichinella spiralis
Trichinella britovi
Trichinella nativa
Trichinella murelli
Trichinella nelsoni
Trichinella papuae
Trichinella zimbabwemsis
Trichinella pseudospiralis

Question 2

Infective Stage & Diagnostic Stage of Trichinella spiralis

Answer 2

Infective: Encysted larva
Diagnostic Encysted larva (muscle biopsy)

Question 3

Mode of transmission of Trichinella spiralis

Answer 3

Ingestion of undercooked or raw meat

Question 4

Disease caused by Angiostrongylus (Parastrongylus) cantonensis

Answer 4

Cerebral Angiostronglyus

Question 5

Longest nematodes of man (up to 1 meter)

Answer 5

Drancunculus medinensis

Question 6

Characteristic of Dracunculus medinensis

Answer 6

Thick cuticle and large uterus that fills the body cavity and contains rhabditoid larvae

Question 7

Infective stage of Dracunculus medinensis

Answer 7

Filariform larva

Question 8

What are the (2) toxocara spp.?

Answer 8

Toxocara canis
Toxocara cati

Question 9

What disease is caused by Anisakis simplex?

Answer 9

Herring disease

Question 10

Name the 1st Intermediate host, 2nd intermediate host and 3rd intermediate host of Anisakis simplex

Answer 10

1st: Copepods
2nd: Smaller fishes
3rd: Larger fishes (salmon)

Question 11

Common name of Baylisascaris procyonis

Answer 11

Raccoon roundworm

Question 12

Mode of transmission of Baylisascaris procyonis

Answer 12

Accidental ingestion of infective stage from environment

Question 13

Where are Angiostrongylus costaricensis found?

Answer 13

Cotton rat and black rat o

Question 14

Disease caused by Angiostrongyus costaricensis

Answer 14

Abdominal Angiostrongyliasis

Question 15

Trichinella nativa infect primarily _____ in the frigid zones

Answer 15

Wild carnivores

Question 16

Who first described Trichinella spiralis? In what year?

Answer 16

Tiedemann; 1822

Question 17

Other name of Wuchereria Bancrofti

Answer 17

Bancroft’s Filarial Worm

Question 18

Phases of infection

Answer 18

Enteric phase
Invasion phase
Convalescent phase

Question 19

Name (3) under Family: Trichinellidae

Answer 19

Trichinella spiralis
Trichuris trichiura
Capillaries philippinensis

Question 20

What family is under Strongyloides stercoralis?

Answer 20

Strongyloididae

Question 21

(3) layers of egg shell in Ascaris lumbricoides

Answer 21

Inner Vitelline/Lipoidal/Lecithin Layer
Middle Glycogen Layer
Outermost Mammilation/Corticated Layer

Question 22

Mechanical vectors of Ascaris lumbricoides

Answer 22

Flies and cockroaches