Helminthology Q-A

Question 1

The snail host of Fasciola gigantica in the Philippines is:

(A). Lymnaea truncatula; (B). Lymnaea bulimoides; (C). Lymnaea auricularia rubiginosa; (D). Lymnaea tormentosa.

Answer 1

Lymnaea auricularia rubiginosa

Question 2

The following parasites occur in the liver of their respective hosts EXCEPT: (A). Fimbraria fasciolaris; (B). Eimeria stiedai; (C). Clonorchis sinensis; (D). Thysanosoma actinoides

Answer 2

Fimbraria fasciolaris

Question 3

The following helminths require earthworms as intermediate hosts EXCEPT:

(A). Capillaria hepatica; (B). Metastrongylus spp.; (C). Capillaria annulata; (D). Amoebotaenia cuneata

Answer 3

Capillaria hepatica

Question 4

This helminth genus is characterized by having a parasitic and free-living generations; the former is parthenogenetic with filariform esophagus and the latter with rhabditiform esophagus:

(A). Strongylus; (B). Strongyloides; (C). Trichostrongylus; (D). Filarioides

Answer 4

Strongyloides

Question 5

Transmammary infection occurs in the following EXCEPT: (A). Toxocara cati; (B). Strongyloides ransomi; (C). Ancylostoma caninum; (D). Bunostomum trigonocephalum

Answer 5

Bunostomum trigonocephalum

Question 6

In Dirofilaria immitis infection in dogs, diagnosis is by finding its microfilaria during blood examination, but this microfilaria should be differentiated from that of this species which is also present in dogs:

(A). Dirofilaria corynoides; (B). Parafilaria multipapillosa; (C). Dipetalonema reconditum; (D). Dipetalonema perstans

Answer 6

Dipetalonema reconditum

Question 7

The following are hookworm species EXCEPT:

(A). Ancylostoma duodenale; (B). Necator americanus; (C). Agriostomum vryburgi; (D). Amidostomum anseris.

Answer 7

Amidostomum anseris

Question 8

All of these are parasites of the eyes EXCEPT:

(A). Oxyspirura mansoni; (B). Philopthalmus spp.; (C). Ascarops strongylina; (D). Thelazia rhodesii

Answer 8

Ascarops strongylina

Question 9

Pedogenesis also known as polyembryony refers to the production of several individuals from a single larval form and is exhibited by all trematodes. The species of tapeworms below also have this characteristic EXCEPT:

(A). Moniezia spp.; (B). Echinococcus spp.; (C). Mesocestoides lineatus; (D). Multiceps multiceps.

Answer 9

Moniezia spp

Question 10

Milk spots in the liver of pigs infected with Ascaris suum are actually: (A). Hepatic cysts; (B). Focal area of calcification; (C). Hepatic abscesses; (D). Localized fibrosis

Answer 10

Localized fibrosis

Question 11

This helminth usually occurs in pairs inside cysts in the lung parenchyma: (A). Paragonimus westermani; (B). Cystocaulus nigrescens; (C). Muellerius capillaries; (D). Protostrongylus rufescens

Answer 11

Paragonimus westermani

Question 12

Oribatid mites serve as intermediate host of the following EXCEPT: (A). Anoplocephala perfoliata; (B). Moniezia benedeni; (C). Raillietina tetragona; (D). Cittotaenia pectinata

Answer 12

Raillietina tetragona

Question 13

Which among the following nematodes has an indirect life cycle?: (A). Strongyloides westeri; (B). Capillaria annulata; (C). Toxascaris leonina; (D). Trichuris suis

Answer 13

Capillaria annulata

Question 14

Which pair has the same mode of infection for the definitive vertebrate host?:
(A). Ascaris suum-Trichinella spiralis;
(B). Oxyuris equi-Strongyloides stercoralis;
(C). Taenia saginata-Schistosoma japonicum;
(D). Paranoplocephala mamillana-Choanotaenia infundibulum.

Answer 14

Paranoplocephala mamillana-Choanotaenia infundibulum

Question 15

Feeling of shame and inferiority is one of the symptoms observed in man infected with: (A). Diphyllobothrium latum; (B). Capillaria philippinensis; (C). Enterobius vermicularis; (D). Trichinella spiralis larvae

Answer 15

Enterobius vermicularis

Question 16

Pseudoscolex is a feature of: (A). Thysaniezia giardi; (B). Fimbraria fasciolaris; (C). Echinococcus multilocularis; (D). Cittotaenia denticulata

Answer 16

Fimbraria fasciolaris

Question 17

Flukes with head collar bearing spines are the: (A). Dicrocoeliids; (B). Amphistomes; (C). Echinostomatids; (D). Schistosomatids

Answer 17

Echinostomatids

Question 18

The mode of transmission of Capillaria philippinensis is:

(A). Consumption of undercooked Pila luzonica containing infective larvae;
(B). Skin penetration by the third stage larvae;
(C). Ingestion of contaminated drinking water;
(D). Ingestion of raw infected Ambassis commersoni or Hypseliotris bipartita.

Answer 18

Ingestion of raw infected Ambassis commersoni or Hypseliotris bipartita

Question 19

Self-cure phenomenon in helminth infection is best exemplified in: (A). Equine gastric habronemiasis; (B). Haemonchosis; (C). Hyostrongylosis; (D). Canine ancylostomosis.

Answer 19

Haemonchosis

Question 20

What nematode species in which the fungus Pilobolus is important in the dissemination of its larvae in the pasture? (A). Metastrongylus pudendotectus; (B). Dictyocaulus viviparus; (C). Toxocara vitulorum; (D). Mecistocirrus digitatus.

Answer 20

Dictyocaulus viviparus

Question 21

Which species has numerous round or oval thickenings on its cuticle especially on the anterior region?
(A). Thelazia rhodesii;
(B). Echinuria uncinata;
(C). Gongylonema pulchrum;
(D). Setaria equina

Answer 21

Gongylonema pulchrum

Question 22

This pair of species utilizes freshwater fish as second intermediate host:

(A). Clonorchis sinensis and Diphyllobothrium latum;
(B). Capillaria hepatica and Gastrodiscus hominis;
(C). Dioctophyme renale and Faciolopsis buski;
(D). Notocotylus naviformis and Echinostoma revolutum.

Answer 22

Clonorchis sinensis and Diphyllobothrium latum

Question 23

Which species is not zoonotic?: (A). Trichostrongylus axei; (B). Dicrocoelium dendriticum; (C). Ostertagia ostertagi; (D). Dirofilaria immitis

Answer 23

Ostertagia ostertagi

Question 24

The rat lungworm Angiostrongylus cantonensis can cause one of the following conditions in man:
(A). Eosinophilic meningoencephalitis;
(B). Verminous pneumonia;
(C). Swimmer’s itch;
(D). Gid

Answer 24

Eosinophilic meningoencephalitis

Question 25

The infective larvae of Habronema species can cause which one of the following conditions when they are deposited on existing wounds of animals especially horses;

(A). Filarial dermatitis;
(B). Itch;
(C). Queensland itch;
(D). Bursati

Answer 25

Bursati

Question 26

Which parasite is not transmitted per cutaneously:
(A). Stephanurus dentatus;
(B). Ancylostoma caninum;
(C). Strongyloides spp.;
(D). Skrjabinagia kolchida

Answer 26

Skrjabinagia kolchida

Question 27

Which species does not require two intermediate hosts in its life cycle?

(A). Platynosomum fastosum;
(B). Fasciola gigantica;
(C). Spirometra erinacei;
(D). Echinostoma ilocanum.

Answer 27

Fasciola gigantica

Question 28

Which of the following is not part of the female reproductive organ in flukes?
(A). Ootype;
(B). Receptaculum seminis;
(C). Vitellaria;
(D). Telamon

Answer 28

Telamon

Question 29

All of these are eyeworms EXCEPT:
(A). Oxyspirura mansoni;
(B). Philophthalmus;
(C). Ascarops strongylina;
(D). Thelazia rhodesii

Answer 29

Ascarops strongylina

Question 30

Infection with this parasite results in rat-tail appearance in the infected animal due to extreme irritation:
(A). Enterobius vermicularis;
(B). Toxocara vitulorum;
(C). Oxyuris equi;
(D). Toxascaris leonina

Answer 30

Oxyuris equi

Question 31

It is also called gapeworm:
(A). Stephanurus dentatus;
(B). Cyathostoma bronchialis;
(C). Mammomonogamus laryngeus;
(D). Syngamus trachea

Answer 31

Syngamus trachea

Question 32

These species are also called arrow-headed worms EXCEPT:
(A). Toxascaris leonina;
(B). Toxocara canis;
(C). Toxocara cati;
(D). Parascaris equorum

Answer 32

Parascaris equorum

Question 33

These are hookworms EXCEPT:
(A). Uncinaria stenocephala;
(B). Necator americanus;
(C). Graphidium strigiosum;
(D). Bunostomum trigonocephalum

Answer 33

Graphidium strigiosum