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Parasitology > Exam 2--Blagburn > Flashcards

Exam 2--Blagburn Flashcards

1
Q

__% of parasites live in __% of horses

A

80, 20

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2
Q

“Hairworm”

A

Trichostrongylus axei

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3
Q

Found in stomach and SI of variety of species

A

Trichostrongylus axei

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4
Q

Life Cycle of Trichostrongylus axei

A

Direct; L3 infective; short pre-patent period

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5
Q

Larva exhibit positive phototropism

A

Trichostrongylus axei

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6
Q

Pre-Patent period for T. axei

A

3 weeks (Short)

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7
Q

Causes hyperplastic gastritis and hypoproteinemia

A

Trichostrongylus axei

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8
Q

“Stomach worms” “spirurids”

A

Habronema & Draschia spp.

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9
Q

Life Cycle o Habronema & Draschia spp.

A

Indirect–Muscid Fly; L3 infective; pass larva in feces

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10
Q

Pre-patent period for Habronema & Draschia spp.

A

2 months

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11
Q

Larval migration choices for Habronema & Draschia spp.

A

Deposited in wound–lungs, skin, eyes

Ingested–stomach

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12
Q

Causes “Summer Sores”

A

Habronema & Draschia spp.

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13
Q

“Roundworm”

A

Parascaris equorum

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14
Q

Inhabit SI of horses (usually foals)

A

Parascaris equorum

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15
Q

Life Cycle of Parascaris equorum

A

Direct; L3 infective

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16
Q

Larva undergo hepatotracheal migration

A

Parascaris equorum

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17
Q

Does P. equorum larva undergo transplaental infection?

A

No

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18
Q

Pre-patent period of P. equorum

A

70-90 days

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19
Q

Causes summer colds and colic

A

Parascaris equorum

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20
Q

Inhabit SI of horses (foals), donkeys, and pigs

A

Strongyloides westeri

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21
Q

Infections involve ONLY females

A

Strongyloides westeri

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22
Q

Two types of life cycles for S. westeri

A

Homogonic–parasitic

Heterogonic–free living

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23
Q

Homogonic life cycle of S. westeri

A

L3 penetrate skin or are ingested via suckling; migrate to lung, trachea, and intestine

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24
Q

Heterogonic life cycle of S. westeri

A

Embryonated eggs pass, larva develop to free living adults and produce L3 larva that can enter homogonic LC

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25
Q

T/F S. westeri causes “foal heat diarrhea”

A

False–probably due to diet changes

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26
Q

“Large equine pinworm”

A

Oxyuris equi

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27
Q

Inhabits large intestine of horses

A

Oxyuris equi

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28
Q

Life cycle of Oxyuris equi

A

Direct; eggs in peranal regin

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29
Q

T/F: Oxyuris equi can exhibit autoinfection/retroinfection

A

False

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30
Q

Pre-patent period of O. equi

A

5 months

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31
Q

Causes “pruritis ani”/ “seat itch”

A

Oxyuris equi

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32
Q

T/F: Equine stronglyes are named large and small based on size ONLY

A

False

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33
Q

How many species of strongyles make up the majority of worm burden

A

~5

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34
Q

Small strongyle life cycle

A

Direct; encyst in muscosa until weather is favorable

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35
Q

Large strongyle life cycle

A

Direct; migrate to cranial mesenteric a and are carried back to intestine

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36
Q

Which of the follow are migratory: Large or small strongyles?

A

Large strongyles

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37
Q

Which has a longer pre-patent period? Large or small stronglyes?

A

Large

38
Q

Cause Larval cyathostomiasis

A

small strongyles

39
Q

Cause verminosus arteritis

A

Large strongyles (S. vulgaris)

40
Q

Associated with thromboembolic colic

A

Large Stronglyes (S. vulgaris)

41
Q

“Equine lungworm”

A

Dictyocaulus arnfieldi

42
Q

Inhabit bronchi and brochioles of equids

A

Dictyocaulus arnfieldi

43
Q

Life cycle of Dictyocaulus arnfieldi

A

Embryonated egg; Direct; migrate to lungs via lymphatics

44
Q

T/F: Dictyocaulus arnfieldi is a TRUE lungworm

A

False—Direct life cycle

45
Q

Causes verminous pneumonia

A

Dictyocaulus arnfieldi

46
Q

“Equine eyeworm”

A

Thelazia lacrymalis

47
Q

Inhabits conjunctival sac and lachrymal ducts of horses (especially

A

Thelazia lacrymalis

48
Q

Life cycle of Thelazia lacrymalis

A

embryonated egg; Indirect–Face flies

49
Q

“Neck threadworm”

A

Onchocerca cervicalis

50
Q

Inhabits nuchal ligament of horses

A

Onchocerca cervicalis

51
Q

Life cycle of Onchocerca cervicalis

A

Indirect–Midges

52
Q

T/F: Onchocerca cervicalis is considered to be a filariid

A

True

53
Q

Causes “Equine recurrent uvetitis” (Moon blindness)

A

Onchocerca cervicalis

54
Q

T/F: Onchocerca cervicalis is responsible for “Fistulous withers”

A

False

55
Q

Can cause CNS disease similar to viral encephalitis

A

Micronema deletrix

56
Q

Where and who do HOTC complex neamtodes inhabit?

A

Abomasum and SI; mostly herbivores

57
Q

HOTC stands for?

A

Haemoncus, Osteragia, Trichostrongylus, Cooperia

58
Q

“Barberpole worm”

A

Haemonchus spp.

59
Q

“Brown stomach worm” “Bankrupt worm”

A

Osteragia spp.

60
Q

“Hairworm”

A

Trichostrongylus spp.

61
Q

“Cooper’s worm”

A

Cooperia spp.

62
Q

Cause anemina and bottle jaw (two)

A

Haemonchus and Ostertagia

63
Q

Caues “morocco leather” appearance of abomasum

A

Ostertagia

64
Q

Which of the HOTC complex is most commmon?

A

Cooperia

65
Q

Larval inhibition associated with which HOTC species?

A

Ostertagia

66
Q

Spontaneous expulsion of adult parasites from abomasum (lambs)

A

Self-cure.. assoc. w/ H. contortus

67
Q

When egg counts rise significantly in spring/early summer

A

Spring Rise

68
Q

“Intestinal threadworm”

A

Strongyloides papillosus

69
Q

Can exhibit transplacental and transcolostral tramission

A

Strongyloides papillosus

70
Q

“Ruminant ascarid”

A

Toxocara (Neoascaris) vitulorum

71
Q

Inhabits SI of cattle and ruminants

A

Toxocara (Neoascaris) vitulorum

72
Q

Life cycle of Toxocara (Neoascaris) vitulorum

A

Direct; L3 ingested and distributed to tissues

73
Q

Which form of transmission for T. vitulorum leads to egg-laying infections?

A

newborn and suckling calves

74
Q

“Whipworms”

A

Trichuris spp. (ovis and discolor)

75
Q

Where do Trichuris spp. inhabit?

A

cecum and upper colon

76
Q

“Nodular worms”

A

Oesophagostomum spp.

77
Q

Inhabit large intestine of variety of species (cattle, sheep, goats)

A

Oesophagostomum spp.

78
Q

Can form nodules on intestinal wall and lead to malabsorption, diarrhea, and weight loss

A

Oesophagostomum spp.

79
Q

“lungworm”

A

Dicyocaulus viviparous

80
Q

Inhabits trachea, bronchi, and bronchioles of ruminants

A

Dicyocaulus viviparous

81
Q

Life cycle of Dicyocaulus viviparous

A

Direct; L3 ingested larva migrate lymphatics–>heart–>lungs; pass embryonated eggs

82
Q

T/F: Dicyocaulus viviparous is a true lungworm

A

False

83
Q

Causes “husk” and emphysema

A

Dicyocaulus viviparous

84
Q

“Hair lungworm”

A

Muellerius capillaris

85
Q

Inhabits lungs parenchyma of sheep, goats, and wild ruminants

A

Muellerius capillaris

86
Q

Contains posterior dorsal appendage

A

Muellerius capillaris

87
Q

Life cycle of Muellerius capillaris

A

Indirect–snails and slugs; pass larva in feces

88
Q

T/F: Muellerius capillaris is a true lungworm

A

True

89
Q

Causes villous endarteritis

A

Dirofilaria immitis

90
Q

Intermediate host for Dipetalonema (Acanthocheilonema) reconditum

A

Fleas

91
Q

Which parasites are ascarids/roundworms

A

P. equorum, T. vitulorum, A. suum

Parasitology (15 decks)

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