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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
T/F S. westeri causes "foal heat diarrhea"
False--probably due to diet changes
26
"Large equine pinworm"
Oxyuris equi
27
Inhabits large intestine of horses
Oxyuris equi
28
Life cycle of Oxyuris equi
Direct; eggs in peranal regin
29
T/F: Oxyuris equi can exhibit autoinfection/retroinfection
False
30
Pre-patent period of O. equi
5 months
31
Causes "pruritis ani"/ "seat itch"
Oxyuris equi
32
T/F: Equine stronglyes are named large and small based on size ONLY
False
33
How many species of strongyles make up the majority of worm burden
~5
34
Small strongyle life cycle
Direct; encyst in muscosa until weather is favorable
35
Large strongyle life cycle
Direct; migrate to cranial mesenteric a and are carried back to intestine
36
Which of the follow are migratory: Large or small strongyles?
Large strongyles
37
Which has a longer pre-patent period? Large or small stronglyes?
Large
38
Cause Larval cyathostomiasis
small strongyles
39
Cause verminosus arteritis
Large strongyles (S. vulgaris)
40
Associated with thromboembolic colic
Large Stronglyes (S. vulgaris)
41
"Equine lungworm"
Dictyocaulus arnfieldi
42
Inhabit bronchi and brochioles of equids
Dictyocaulus arnfieldi
43
Life cycle of Dictyocaulus arnfieldi
Embryonated egg; Direct; migrate to lungs via lymphatics
44
T/F: Dictyocaulus arnfieldi is a TRUE lungworm
False---Direct life cycle
45
Causes verminous pneumonia
Dictyocaulus arnfieldi
46
"Equine eyeworm"
Thelazia lacrymalis
47
Inhabits conjunctival sac and lachrymal ducts of horses (especially
Thelazia lacrymalis
48
Life cycle of Thelazia lacrymalis
embryonated egg; Indirect--Face flies
49
"Neck threadworm"
Onchocerca cervicalis
50
Inhabits nuchal ligament of horses
Onchocerca cervicalis
51
Life cycle of Onchocerca cervicalis
Indirect--Midges
52
T/F: Onchocerca cervicalis is considered to be a filariid
True
53
Causes "Equine recurrent uvetitis" (Moon blindness)
Onchocerca cervicalis
54
T/F: Onchocerca cervicalis is responsible for "Fistulous withers"
False
55
Can cause CNS disease similar to viral encephalitis
Micronema deletrix
56
Where and who do HOTC complex neamtodes inhabit?
Abomasum and SI; mostly herbivores
57
HOTC stands for?
Haemoncus, Osteragia, Trichostrongylus, Cooperia
58
"Barberpole worm"
Haemonchus spp.
59
"Brown stomach worm" "Bankrupt worm"
Osteragia spp.
60
"Hairworm"
Trichostrongylus spp.
61
"Cooper's worm"
Cooperia spp.
62
Cause anemina and bottle jaw (two)
Haemonchus and Ostertagia
63
Caues "morocco leather" appearance of abomasum
Ostertagia
64
Which of the HOTC complex is most commmon?
Cooperia
65
Larval inhibition associated with which HOTC species?
Ostertagia
66
Spontaneous expulsion of adult parasites from abomasum (lambs)
Self-cure.. assoc. w/ H. contortus
67
When egg counts rise significantly in spring/early summer
Spring Rise
68
"Intestinal threadworm"
Strongyloides papillosus
69
Can exhibit transplacental and transcolostral tramission
Strongyloides papillosus
70
"Ruminant ascarid"
Toxocara (Neoascaris) vitulorum
71
Inhabits SI of cattle and ruminants
Toxocara (Neoascaris) vitulorum
72
Life cycle of Toxocara (Neoascaris) vitulorum
Direct; L3 ingested and distributed to tissues
73
Which form of transmission for T. vitulorum leads to egg-laying infections?
newborn and suckling calves
74
"Whipworms"
Trichuris spp. (ovis and discolor)
75
Where do Trichuris spp. inhabit?
cecum and upper colon
76
"Nodular worms"
Oesophagostomum spp.
77
Inhabit large intestine of variety of species (cattle, sheep, goats)
Oesophagostomum spp.
78
Can form nodules on intestinal wall and lead to malabsorption, diarrhea, and weight loss
Oesophagostomum spp.
79
"lungworm"
Dicyocaulus viviparous
80
Inhabits trachea, bronchi, and bronchioles of ruminants
Dicyocaulus viviparous
81
Life cycle of Dicyocaulus viviparous
Direct; L3 ingested larva migrate lymphatics-->heart-->lungs; pass embryonated eggs
82
T/F: Dicyocaulus viviparous is a true lungworm
False
83
Causes "husk" and emphysema
Dicyocaulus viviparous
84
"Hair lungworm"
Muellerius capillaris
85
Inhabits lungs parenchyma of sheep, goats, and wild ruminants
Muellerius capillaris
86
Contains posterior dorsal appendage
Muellerius capillaris
87
Life cycle of Muellerius capillaris
Indirect--snails and slugs; pass larva in feces
88
T/F: Muellerius capillaris is a true lungworm
True
89
Causes villous endarteritis
Dirofilaria immitis
90
Intermediate host for Dipetalonema (Acanthocheilonema) reconditum
Fleas
91
Which parasites are ascarids/roundworms
P. equorum, T. vitulorum, A. suum

Parasitology (15 decks)

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