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AA Vet Roundworms > Ascarididae, Toxocaridae, Oxyuridae > Flashcards

Ascarididae, Toxocaridae, Oxyuridae Flashcards

1
Q

What are the two types of lifecycle of Ascaridoidea?

A

Somatic and Tracheal route of migration

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2
Q

Which larva is ingested by the host in the somatic route?

A

L3

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3
Q

Which Ascaris species may cross infect humans?

A

Ascaris lumbricoides

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4
Q

What is the infected site of A. suis?

A

SI

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5
Q

What does the lipid layer of the eggshell of A. suis contain?

A

ascarosides

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6
Q

Infection of A. suis is through ingestion of which larval stage?

A

L2

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7
Q

What are the paratenic hosts of A. suis?

A

beetle and earthworms

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8
Q

What is the route of migration of A. suum?

A

tracheal

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9
Q

What are the external signs of A. suis in pigs as disease progresses to pneumonia?

A

thumps or thumping

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10
Q

What are the three basic disease problems common in swine farms?

A

scouring, pneumonia, parasitism

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11
Q

What is the shape of eggs of Parascaris equorum?

A

sub spherical shaped

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12
Q

What is the affected site of P. equorum?

A

SI

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13
Q

What is the route of migration of P. equorum?

A

tracheal

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14
Q

What lesions are caused by P. equorum in equine liver?

A

white ribrous tracts

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15
Q

What is the route of migration of Neoascaris vitulorum?

A

Somatic

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16
Q

What is the host and predilection site of Toxocara vitulorum?

A

cattle and buffalo, small intestine

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17
Q

How may a calf be infected with Toxocara vitulorum through milk?

A

with L3

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18
Q

How long is T. vitulorum present in milk after parturition?

A

30 days

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19
Q

Which parasite is associated with Loffler’s syndrome?

A

ascaris

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20
Q

What are the modes of transmission of T. canis?

A

transmammary, transplacental, ingestion of infective egg or paratenic hosts

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21
Q

What is the host and predilection site of Toxocara canis?

A

dogs, SI

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22
Q

Which Toxocara species affects the SI of cats?

A

Toxocara cati

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23
Q

What are the modes of transmission of T. cati?

A

transmammary

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24
Q

What features may occur due to tracheal migration of T. cati?

A

liver fibrosis and lobular pneumonia

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25
Q

What is the common name of T. cati?

A

arrow headed worm of cat

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26
Q

Which Toxascara species affects the SI of dogs and cats?

A

T. leonina

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27
Q

How is T. leonina transmitted?

A

ingestion of paratenic hosts or by ingestion of L2

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28
Q

Which nematode species are associated with visceral larva migrans in humans?

A

T. canis, T. leonina, T. cati, bayliscaris procyonins, Strongyloides ransomi

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29
Q

Which Ascaris species may affect the CNS of pigs?

A

A. suis

30
Q

What lesions are caused by visceral larva migrans?

A

chronic granulomatous

31
Q

What do you call the system used to control Ascaridoidea infection?

A

McClean County system

32
Q

What is the SN of the horse pinworm?

A

oxyuris equi

33
Q

Describe the egg morphology of horse pinworm.

A

flattened side and has a mucoid plug

34
Q

What are the pathogenic effects of oxyuris equi?

A

Sloughing of intestinal mucosa, anal pruritus

35
Q

Which genera and species of Ascaridoidea do not have a migratory cycle?

A

Toxascaris leonina, Toxocara canis

36
Q

What is known as the human pinworm or seatworm?

A

Enterobius vermicularis

37
Q

What is the affected site of Enterobius vermicularis?

A

cecum, appendix, perineal region

38
Q

Which Ascaridoidea genera and species is an unusual perpetual parasite?

A

Probstmayria vivipara

39
Q

What Kathlanidae sp. affects the large intestine of horses?

A

Probstmayria vivipara

40
Q

What is the mode of transmission of Probstmayria vivipara?

A

ingestion of larva through coprophagy

41
Q

What is the most common and largest pig nematode?

A

Ascaris suum

42
Q

What is the morphology of the male reproductive system of A. suis?

A

present spicule and precloacal papillae

43
Q

Describe the egg morphology of A. suis.

A

oval, thick shells, prominent projections, brownish yellow

44
Q

What are the characteristics of Parascaris equorum?

A

rigid stout worm with 3 main lips separated by 3 small intermediate lips

45
Q

Describe the male reproductive system of Parascaris equorum.

A

tail has small lateral alae, 2 double and 3 single pairs of postcloacal papillae, with spicule

46
Q

Where is the vulva located in P. equorum species?

A

end of the first quarter of the body

47
Q

What members of this genus have a posterior granular ventriculus at the base of the esophagus?

A

Toxocara canis

48
Q

Describe the eggs of Toxocara canis.

A

subglobular, with thick, finely pitted shells

49
Q

What is the description of Toxocara cati?

A

large white worm, male has long finger like processes at the tip of the tail

50
Q

What is the difference between Toxascara leonina and T. canis?

A

absence of finger like process at the tip of the male tail

51
Q

Which species has their vulva open near the end of the first third of the body?

A

Ascaris suum

52
Q

What is the morphological difference of T. cati and Toxascara leonina?

A

cervical alae is lanceolate in Toxascaris and arrow headed shaped in T. cati

53
Q

What is the largest intestinal parasite of cattle?

A

Neoascaris vitulorum

54
Q

What is the description of the eggs of Neoascaris vitulorum?

A

subglobular eggs with a thick, pitted, albuminous layer

55
Q

What is the treatment of ascarid infection in swine?

A

levamisole, tetramisole, Piperazine

56
Q

What is the treatment of ascarid infection in dogs and cats?

A

piperazine, mebendazole, pyranted pamoate

57
Q

Which species cause milk spots in the liver of affected animals?

A

Ascaris suis

58
Q

What is the treatment of ascarid infection in cattle?

A

piperazine, levamizole, fenbendazole

59
Q

Which species is associated with a rat-tailed appearance?

A

oxyuris equi

60
Q

What condition is manifested as pot belly in dogs?

A

Toxocara canis

61
Q

What is the morphology of eggs of Oxyuris equi?

A

elongate, flattened on one side, with plug on one pole

62
Q

What are the drugs for Oxyuris equi treatment?

A

Mebendazole, thiabendazole, cambendazole, pyrantel

63
Q

What is the esophagus structure of oxyuris equi?

A

well developed posterior bulb

64
Q

What is the esophagus structure of Enterobius vermicularis?

A

double bulb esophagus

65
Q

What is the SN of the small pinworm of horses?

A

Probstmayria vivipara

66
Q

Which pinworm is present in the cecum and colon of rabbits and hares?

A

Passalurus ambiguous

67
Q

What are the characteristics of Neoascaris vitulorum?

A

thick, pinkish when fresh, and cuticle is transparent

68
Q

Which pinworm is present in the cecum and colon of domestic and wild ruminants?

A

Skrjabinema spp

69
Q

What is unique about the small pinworm of horses?

A

female viviparous and give birth to larvae almost as large as the adult

70
Q

What does Oxyuris equi produce in the perineal skin?

A

greyish yellow masses of eggs

AA Vet Roundworms (10 decks)

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