Helminthology Q-A Flashcards
The snail host of Fasciola gigantica in the Philippines is:
(A). Lymnaea truncatula; (B). Lymnaea bulimoides; (C). Lymnaea auricularia rubiginosa; (D). Lymnaea tormentosa.
Lymnaea auricularia rubiginosa
The following parasites occur in the liver of their respective hosts EXCEPT: (A). Fimbraria fasciolaris; (B). Eimeria stiedai; (C). Clonorchis sinensis; (D). Thysanosoma actinoides
Fimbraria fasciolaris
The following helminths require earthworms as intermediate hosts EXCEPT:
(A). Capillaria hepatica; (B). Metastrongylus spp.; (C). Capillaria annulata; (D). Amoebotaenia cuneata
Capillaria hepatica
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
Strongyloides
Transmammary infection occurs in the following EXCEPT: (A). Toxocara cati; (B). Strongyloides ransomi; (C). Ancylostoma caninum; (D). Bunostomum trigonocephalum
Bunostomum trigonocephalum
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
Dipetalonema reconditum
The following are hookworm species EXCEPT:
(A). Ancylostoma duodenale; (B). Necator americanus; (C). Agriostomum vryburgi; (D). Amidostomum anseris.
Amidostomum anseris
All of these are parasites of the eyes EXCEPT:
(A). Oxyspirura mansoni; (B). Philopthalmus spp.; (C). Ascarops strongylina; (D). Thelazia rhodesii
Ascarops strongylina
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.
Moniezia spp
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
Localized fibrosis
This helminth usually occurs in pairs inside cysts in the lung parenchyma: (A). Paragonimus westermani; (B). Cystocaulus nigrescens; (C). Muellerius capillaries; (D). Protostrongylus rufescens
Paragonimus westermani
Oribatid mites serve as intermediate host of the following EXCEPT: (A). Anoplocephala perfoliata; (B). Moniezia benedeni; (C). Raillietina tetragona; (D). Cittotaenia pectinata
Raillietina tetragona
Which among the following nematodes has an indirect life cycle?: (A). Strongyloides westeri; (B). Capillaria annulata; (C). Toxascaris leonina; (D). Trichuris suis
Capillaria annulata
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.
Paranoplocephala mamillana-Choanotaenia infundibulum
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
Enterobius vermicularis
Pseudoscolex is a feature of: (A). Thysaniezia giardi; (B). Fimbraria fasciolaris; (C). Echinococcus multilocularis; (D). Cittotaenia denticulata
Fimbraria fasciolaris
Flukes with head collar bearing spines are the: (A). Dicrocoeliids; (B). Amphistomes; (C). Echinostomatids; (D). Schistosomatids
Echinostomatids
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.
Ingestion of raw infected Ambassis commersoni or Hypseliotris bipartita
Self-cure phenomenon in helminth infection is best exemplified in: (A). Equine gastric habronemiasis; (B). Haemonchosis; (C). Hyostrongylosis; (D). Canine ancylostomosis.
Haemonchosis
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.
Dictyocaulus viviparus
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
Gongylonema pulchrum
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.
Clonorchis sinensis and Diphyllobothrium latum
Which species is not zoonotic?: (A). Trichostrongylus axei; (B). Dicrocoelium dendriticum; (C). Ostertagia ostertagi; (D). Dirofilaria immitis
Ostertagia ostertagi
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
Eosinophilic meningoencephalitis
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
Bursati
Which parasite is not transmitted per cutaneously:
(A). Stephanurus dentatus;
(B). Ancylostoma caninum;
(C). Strongyloides spp.;
(D). Skrjabinagia kolchida
Skrjabinagia kolchida
Which species does not require two intermediate hosts in its life cycle?
(A). Platynosomum fastosum;
(B). Fasciola gigantica;
(C). Spirometra erinacei;
(D). Echinostoma ilocanum.
Fasciola gigantica
Which of the following is not part of the female reproductive organ in flukes?
(A). Ootype;
(B). Receptaculum seminis;
(C). Vitellaria;
(D). Telamon
Telamon
All of these are eyeworms EXCEPT:
(A). Oxyspirura mansoni;
(B). Philophthalmus;
(C). Ascarops strongylina;
(D). Thelazia rhodesii
Ascarops strongylina
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
Oxyuris equi
It is also called gapeworm:
(A). Stephanurus dentatus;
(B). Cyathostoma bronchialis;
(C). Mammomonogamus laryngeus;
(D). Syngamus trachea
Syngamus trachea
These species are also called arrow-headed worms EXCEPT:
(A). Toxascaris leonina;
(B). Toxocara canis;
(C). Toxocara cati;
(D). Parascaris equorum
Parascaris equorum
These are hookworms EXCEPT:
(A). Uncinaria stenocephala;
(B). Necator americanus;
(C). Graphidium strigiosum;
(D). Bunostomum trigonocephalum
Graphidium strigiosum
Freshwater fish is the intermediate hosts of: (A). Ollulanus tricuspis;
(B). Gnathostoma spinigerum;
(C). Spirocerca lupi;
(D). Physaloptera canis.
Gnathostoma spinigerum
A form of immunity seen in protozoan and some helminth infections that is
dependent upon the continued presence of the parasite is: (A). Immunological
tolerance; (B). Phagocytosis; (C). Pinocytosis; (D). Premunition.
Premunition
Which among these has no alimentary canal but has uterine bell?
(A). Heterakis beramporiae
(B). Dipylidium caninum;
(C). Polymorphus boschadis
(D). Fischoederius elongatus.
Polymorphus boschadis
Which of the following has only one spicule?
(A). Ascaris suum;
(B). Haemonchus contortus;
(C). Oesophagotomum radiatum;
(D). None of the above.
None of the above
In Elaeophora poeli
those that are fully enclosed inside the nodules are:
(A). Both male and females;
(B). Male only;
(C). Female only;
(D). None of the above.
Male only
This species causes haemorrhagic nodules on the skin of cattle and water
buffaloes:
(A). Parafilaria bovicola;
(B). Setaria digitata;
(C). Haematopinus tuberculatus;
(D). Ostertagia ostertag
Parafilaria bovicola
Fertilized females exhibit brown cement
-like ring around the vulva in this
species:
(A). Tetrameres americana;
(B). Spirocerca lupi;
(C). Physalotera praeputialis;
(D). None of the above.
Physalotera praeputialis
The presence of cordons is a feature seen in the following
EXCEPT:
(A). Dispharynx spiralis;
(B). Heterakis gallinae;
(C). Echinuria uncinata;
(D). Cheilospirura hamulosa.
Heterakis gallinae
The following are all stomach worms of their respective hosts
EXCEPT:
(A).
Hyostrongylus rubidus;
(B). Physocephalus sexalatus;
(C). Ascarops strongylina;
(D). Oesophagustomum dentatum.
Oesophagustomum dentatum
The cause of eosinophilic granulomata in the intestine of man is:
(A). Brugia malayi;
(B). Angiostrongylus costaricensis;
(C). Enterobius vermicularis;
(D). Angiostrongylus cantonensis.
Angiostrongylus costaricensis
Both hyper- and auto infections can occur in infection with this species:
(A). Ascaris suum;
(B). Strongyloides stercoralis;
(C). Capillaria annulata;
(D). None of the above
Strongyloides stercoralis
Ascaris suum eggs are not immediately infective after being passed out with
feces but need maturation period of:
(A). 30 days;
(B). 25 days;
(C). 10-12
days;
(D). 5 days.
10-12
days
These structures are found in the posterior end of nematodes which function as
chemoreceptors, well supplied with nerve fibers and associated with glandular
structure:
(A). Phasmids;
(B). Dierids;
(C). Amphids;
(D). None of the above.
Phasmids
The following members of the family Fasciolidae occur in the liver of their
respective hosts EXCEPT:.
(A). Fasciolopsis buski;
(B). Fascioloides magna;
(C). Fasciola gigantica;
(D). Fasciola nyanzae.
Fasciolopsis buski
Fecal examination is not a reliable method of diagnosing infection with this
parasite:
(A). Trichostrongylus spp.;
(B). Trichuris vulpis;
(C). Oxyuris equi;
(D). None of the above
Oxyuris equi
What trichostrongylid species whose egg does not hatch until infective larva (L3) has developed in the eggshell:
(A). Mecistocirrus digitatus;
(B). Cooperia
curticei;
(C). Paracooperia nodulosa;
(D). Nematodirus battus.
Nematodirus battus
The cause of granular dermatitis in horses is: (A). Gnathostoma doloresi;
(B). Ascarops strongylina;
(C). Physocephalus sexalatus;
(D). Habronema muscae
Habronema muscae
These nematodes undergo hypobiosis
EXCEPT:
(A). Ostertagia ostertagi;
(B). Haemonchus contortus;
(C). Uncinaria stenocephala;
(D). Cooperia oncophora
Uncinaria stenocephala
A pathological condition with symptoms such as hepatomegaly, pulmonary
infiltration, intermittent fever, loss of weight and appetite and persistent cough
caused by ascaris organisms. This is called:
(A). Cutaneous larva migrans;
(B). Visceral larva migrans;
(C). Urticarial hepatic syndrome;
(D). Localized general peritonitis.
Visceral larva migrans
This is an important nodular worm of cattle: (A). Oesophagostomum radiatum;
(B). Oesophagostomum stephanostomum;
(C). Oesophagostomum aculeatum;
(D). Oesophagostomum dentatum
Oesophagostomum radiatum
These are all effects of
Trichostrongylus EXCEPT:
(A). Low secretion of cholecystokinin;
(B). Reduced utilization of food;
(C). Decreased uptake of
selenium;
(D). Low plasma phosphorus.
Low secretion of cholecystokinin
The cause of gape in poultry is:
(A). Stephanurus dentatus;
(B). Cyathostoma bronchialis;
(C). Mammomonogamus laryngeus;
(D). Syngamus trachea.
Syngamus trachea
Which of these stages of Trichostrongy
lus is the least susceptible to extreme
changes in environmental conditions:
(A). Second stage larva;
(B). Embryonated egg;
(C). Unembryonated egg;
(D). Third stage larva.
Third stage larva
A complication of the acute illness of this infection is black disease, which
occurs in normal sheep. What parasite causes this illness?
(A). Fasciolopsis buski;
(B). Fascioloides magna;
(C). Fasciola hepatica;
(D). Clonorchis sinensis.
Fasciola hepatica
Elongate unisexual trematode, which carries its female in a canal and inhabits the blood vessel of its host:
(A). Schistosoma;
(B). Fasciolopsis buski;
(C). Eurytrema pancreaticum;
(D). Thysanosoma actinoides
Schistosoma
It has been proven that prenatal infection occurs in the life cycle of these
nematodes EXCEPT:
(A). Toxocara canis;
(B). Parascaris equorum;
(C). Toxocara vitulorum;
(D). Toxocara cati.
Toxocara cati
All of these parasites infect the lungs
EXCEPT:
(A). Cheilospirura hamulosa;
(B). Filarioides osleri;
(C). Dictyocaulus viviparus;
(D). Metastrongylus elongatus.
Cheilospirura hamulosa
Which of these stages of Trichostrongylus sp. is most susceptible to extreme environmental condition:
(A). Unembryonated egg;
(B). Second stage larva;
(C). First stage larva;
(D). Embryonated egg.
Second stage larva
These are hookworms
EXCEPT:
(A). Uncinaria stenocephala;
(B). Necator americanus;
(C). Graphidium strigiosum;
(D). Bunostomum trigonocephalum.
Graphidium strigiosum
Cause of cascado or verminous dermatitis in man is:
(A). Mecistocirrus digitatus;
(B). Gnathostoma spinigerum;
(C). Tetrameres americana;
(D).
Stephanofilaria okinawaensis.
Stephanofilaria okinawaensis
All of these cause dirofilariosis
EXCEPT:
(A). Brugia timori;
(B). Elaeophora schneideri;
(C). Mastophorus muris;
(D). Wuchereria bancrofti.
Mastophorus muris
Pathogenic effect of Strongylus vulgaris in equine is:
(A). Interference with absorption, bowel movement and indigestion;
(B). Severe lesions in arterial system forming thrombi which maybe fatal;
(C). Cirrhosis of the liver resulting to ascites; (D). Nodular formation causing localized inflammation around each larva.
Severe lesions in arterial system forming thrombi which maybe fatal
Fatal human hydatidosis is caused by:
(A). Echinococcus granulosus;
(B). Moniezia benedeni;
(C). Oesophagostomum stephanostomum;
(D). Spirometra mansoni.
Echinococcus granulosus
Oesophageal worm of dogs is:
(A). Spirocerca lupi;
(B). Echinococcus granulosus;
(C). Physaloptera praeputialis;
(D). Thelazia californensis.
Spirocerca lupi
Cutaneous larva migrans is caused by:
(A). Toxocara vitulorum;
(B). Uncinaria stenocephala;
(C). Filariodes osleri;
(D). Toxocara leonina.
Uncinaria stenocephala
Trichinosis in man, which is maintained in the cycle of infection between wild carnivores and humans, is called:
(A). Bionomic cycle;
(B). Synantropic zoonotic cycle;
(C). Hypobiotic cycle;
(D). Sylvatic-zoonotic cycle
Sylvatic-zoonotic cycle
Liverfluke of elephants:
(A). Paramphistomum cervi;
(B). Clonorchis sinensis;
(C). Fasciolopsis buski;
(D). Fasciola hepatica.
Fasciola hepatica
Gid or staggers a brain disease caused by the presence of the metacestode in the
intermediate host of which parasite?:
(A). Hymenolepis nana;
(B). Taenia multiceps;
(C). Taenia serialis;
(D). Echinococcus granulosus.
Taenia multiceps
Important lungfluke of carnivores:
(A). Schistosoma japonicum;
(B). Paragonimus westermani;
(C). Opisthorchis tenuicollis;
(D). Limnatis africana
Paragonimus westermani
Cause of sparganosis in man is:
(A). Spirocerca lupi;
(B). Oesophagostomum stephanostomum;
(C). Trichinella spiralis;
(D). Spirometra mansoni.
Spirometra mansoni
Egg of this parasite is characteristically quadrilateral in shape:
(A). Moniezia benedeni;
(B). Taenia solium;
(C). Raillietina tetragona;
(D). Dipylidium caninum.
Moniezia benedeni
The diagnosis of these parasites involves the finding of their eggs in the urine of their respective hosts EXCEPT:
(A). Stephanurus dentatus;
(B). Dioctophyme remale;
(C). Capillaria plica;
(D). Angiostrongylus vasorum.
Angiostrongylus vasorum
This parasite causes catarrhal parasitic bronchitis in ruminants:
(A). Onchoceca gibsoni;
(B). Hyostrogylus rubidus;
(C). Dictyocaulus filaria;
(D). Metastrongylus elongatus.
Dictyocaulus filaria
Infection in man with this species results from eating uncooked infected fish or frogs:
(A). Tetrameres americana;
(B). Gnathostoma spinigerum;
(C). Simondsia paradoxa;
(D). Thelazia rhodesii.
Gnathostoma spinigerum
Genetically inherited immunization against infection is possible in:
(A). Trichostrongylus colubriformis in sheep; (B). Ostertatia ostertagi in cattle;
(C). Graphidium strigiosum in rabbit;
(D). Strongylus vulgaris in equine.
Trichostrongylus colubriformis in sheep
This parasite is permanently in copula:
(A). Graphidium strigiosum;
(B). Syngamus trachea;
(C). Cyatosthoma bronchialis;
(D). Haemonchus contortus.
Syngamus trachea
A technique use in larval recovery is:
(A). Microscopic technique;
(B). Flotation technique;
(C). Baermann‟s technique;
(D). concentration technique.
Baermann‟s technique