parasitology exams

1. Indicate the INCORRECT relationship:

A. Order Ascaridida / mouth with three lips
B. Order Enoplida / anterior end narrower than the posterior
C. Order Strongylida / males with copulatory bursa
D. Order Oxyurida / rhabditiform esophagus

D. Order Oxyurida / rhabditiform esophagus

Which vector transmits Dirofilaria immitis?

A. Fleas
B. Hard ticks
C. Culicid mosquitoes
D. Any of them

C. Culicid mosquitoes

Regarding Dirofilaria immitis:

A. Females are viviparous
B. Males have a spiral-shaped tail
C. The infective stage is L3
D. All are correct

D. All are correct

Regarding Oxyuris:

A. It is a parasite of rabbits
B. It is located in the small intestine of the host
C. Its eggs are round with a thick shell
D. It causes anal pruritus

D. It causes anal pruritus

Oxyurids:

A. They are very frequent
B. They are very pathogenic
C. They are zoonotic
D. All are false

A. They are very frequent

A nematode found in the heart of dogs is:

A. Dipetalonema dracunculoides
B. Dirofilaria immitis
C. Angiostrongylus vasorum
D. Aelurostrongylus abstrusus

B. Dirofilaria immitis

Habronema and Draschia are found in:

A. Ocular conjunctiva of ruminants
B. Stomach of equids
C. Large intestine of birds
D. Large intestine of canids

B. Stomach of equids

Members of the class Nematoda:

A. They are round
B. They have an anus separate from the excretory pore
C. They have sensory organs
D. All statements are correct

All statements are correct

1. Indicate the INCORRECT relationship:
A. Order Ascaridida / mouth with three lips
B. Order Enoplida / anterior end narrower than posterior
C. Order Strongylida / males with copulatory bursa
D. Order Oxyurida / rhabditiform esophagus

D. Order Oxyurida / rhabditiform esophagus

Which vector transmits Dirofilaria immitis?
A. Fleas
B. Hard ticks
C. Culicid mosquitoes
D. Any of them

C. Culicid mosquitoes

Regarding Dirofilaria immitis:
A. Females are viviparous
B. Males have a spiral tail
C. Infective stage is L3
D. All are correct

D. All are correct

Regarding Oxyuris:
A. Parasite of rabbits
B. Located in the small intestine
C. Eggs are round with thick shell
D. Causes anal pruritus

D. Causes anal pruritus

Oxyurids:
A. They are very frequent
B. Very pathogenic
C. Zoonotic
D. All are false

A. They are very frequent

Nematode found in the heart of dogs:
A. Dipetalonema dracunculoides
B. Dirofilaria immitis
C. Angiostrongylus vasorum
D. Aelurostrongylus abstrusus

B. Dirofilaria immitis

Habronema and Draschia are found in:

Stomach of equids

Members of class Nematoda:

A. They are round
B. They have an anus separate from the excretory pore
C. They have sensory organs
D. All statements are correct

D. All statements are correct ✅

Correct statement regarding nematodes:

A. The infective stage is usually L3
B. The last larval stage is L6
C. All eggs are eliminated with L1 already formed
D. All statements are correct

A. The infective stage is usually L3

Correct relationship:

A. Order Ascaridida / mouth with three lips
B. Order Strongylida / males with spiral posterior end
C. Order Enoplida / anterior end wider than posterior
D. Order Oxyurida / males with copulatory bursa

A. Order Ascaridida / mouth with three lips ✅

Members of Order Strongylida:

A. Infective stage for the definitive host is L3
B. Eggs are operculated
C. Esophagus is filariform
D. They are hermaphrodites

A. Infective stage for the definitive host is L3

Strongylid that feeds on blood in the abomasum of ruminants:

A. Haemonchus
B. Trichostrongylus
C. Ostertagia
D. Ancylostoma

A. Haemonchus

“Nodular worm” of the large intestine of ruminants and pigs:

A. Ostertagia
B. Nematodirus
C. Oesophagostomum
D. Uncinaria

C. Oesophagostomum

Hook-shaped strongylids with large buccal capsule causing hemorrhage belong to:

A. Ascarididae
B. Trichostrongylidae
C. Ancylostomatidae
D. None of the above

C. Ancylostomatidae

Protostrongylids of ruminants:

A. Intermediate hosts are terrestrial snails and slugs
B. Adults are located in the trachea
C. Definitive hosts shed unembryonated eggs
D. All are correct

D. All are correct, as Protostrongylids primarily use terrestrial snails and slugs as intermediate hosts, reside in the trachea of ruminants, and the definitive hosts release unembryonated eggs.

Syngamus trachea parasitizes:

A. Birds
B. Suids
C. Ruminants
D. Carnivores

A. the trachea of birds, causing respiratory issues as it forms nodules.

Equine strongylids:

A. Adults are hematophagous
B. Life cycles are very short
C. Adults are found in the small intestine
D. All statements are false

C. all are false
Equine strongylids are a group of parasitic worms commonly found in horses; they typically have complex life cycles and can affect the large intestine, with some species being hematophagous.

Dictyocaulus:

A. Small bronchopulmonary worms of ruminants
B. Found in alveoli
C. Larvae spread via coprophilous fungi
D. Indirect life cycle

C. Larvae spread via coprophilous fungi

Dictyocaulus is a genus of small bronchopulmonary worms that primarily infect ruminants, residing in the alveoli and spreading through fecal contamination involving coprophilous fungi; they typically have a direct life cycle.

Bronchopulmonary nematode of cats:

A. Angiostrongylus
B. Metastrongylus
C. Protostrongylus
D. Aelurostrongylus

D. Aelurostrongylus is a bronchopulmonary nematode that parasitizes cats, often residing in the lungs and causing respiratory issues.

Diagnostic form of most bronchopulmonary nematodes:

A. L3 larvae
B. Eggs with L2 inside
C. L1 larvae
D. Unembryonated eggs

C. L1 larvae are the diagnostic form of most bronchopulmonary nematodes, typically found in feces and used for identification in diagnostic procedures.

Nematode found in ocular conjunctiva:

A. Gnathostoma
B. Spirocerca
C. Gongylonema
D. Thelazia

D. Thelazia is a nematode that infects the ocular conjunctiva of various mammals, causing symptoms such as conjunctivitis and excessive tearing.

Strongylids:

A. Trichuris
B. Capillaria
C. Ascaris
D. Oxyuris

D. Oxyuris are not classified as strongylids; they are a separate group of nematodes. Strongylids typically include parasitic roundworms such as various members of the Strongylinae subfamily that infect horses and ruminants.

7. Hookworms:

A. Trichuris
B. Syngamus
C. Stephanurus
D. Ancylostoma

D. Ancylostoma

Strongylid forming hypobiotic nodules in ruminant abomasum:

A. Ostertagia
B. Ancylostoma
C. Trichostrongylus
D. Oesophagostomum

A. Ostertagia

Regarding Ancylostoma:

A. No buccal capsule
B. Parasite of sheep
C. Located in the large intestine
D. Can infect through the skin

D. Can infect through the skin

Chabertia and Oesophagostomum are found in:

A. Large intestine of ruminants
B. Abomasum
C. Stomach of pigs
D. Stomach of horses

A. Large intestine of ruminants

Diagnostic stage of protostrongylids in feces:

A. L1
B. L2
C. L3
D. Unembryonated eggs

A. L1

Intermediate hosts of protostrongylids:

A. Terrestrial snails
B. Ants
C. Grass mites
D. Flea larvae

A. Terrestrial snails

Y-shaped nematode in permanent copulation in birds:

A. Hyostrongylus
B. Stephanurus
C. Haemonchus
D. Syngamus

D. Syngamus

False statement about Dictyocaulus:

A. Large bronchopulmonary worms of ruminants
B. Located in trachea
C. Males have copulatory bursa
D. Indirect life cycle

D. Indirect life cycle

Ancylostomatids:

A. Belong to Ascaridida
B. Found in stomach
C. Have a buccal capsule
D. All statements are incorrect

C. Have a buccal capsule

Which bronchopulmonary nematode affects dogs?

A. Angiostrongylus
B. Metastrongylus
C. Protostrongylus
D. Aelurostrongylus

D. Angiostrongylus