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Clinical Pathology/Parasitology > External Parasites > Flashcards

External Parasites Flashcards

1
Q

what parasites live or feed upon the skin of an animal?

A

Ectoparasites

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2
Q

what is the presence of extoparasites referred to as?

A

infestation

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3
Q

what are the goups of arthropods? (2)

A
  1. insects

2. arachnids

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4
Q

what are some insects? (3)

A
  1. Lice
  2. fleas
  3. flies
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5
Q

how many legs do insects have?

where do they origionate?

A

6 legs

the thorax

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6
Q

what are the 3 segments of an insects body?

A

head
thorax
abdomen

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7
Q

what are some arachnids? (2)

A

Ticks

mites

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8
Q

what are the 2 segments of an arachnids body?

A

fused head/thorax

abdomen

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9
Q

how many legs do arachnids have?

where do they origionate?

A

8 legs

abdomen

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10
Q

what irritation can parasites cause?

A

biting and crawling

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11
Q

what can the presence of parasites cause? (3)

A

Loss of body condition
Anemia
Disease transmission

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12
Q

how are infestation diagnosed?

A
  1. Some visible to the naked eye

2. Some easily collected by skin scraping for microscopic identification

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13
Q

what is the genus/species for the flea?

A

Ctenocephalides spp.

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14
Q

what can cause flea pupae to hatch?

A

stimulation

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15
Q

what can a flea infestation cause to the animal? (3)

A

Irritation and itching
loss of body condition
flea allergy dermatitis

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16
Q

how is the plague transmitted?

A

infected rodent flea

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17
Q

what is the genus and species of ear mites?

A

Otodectes cynotis

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18
Q

what is the genus and species name for the fur mite (walking dandruff mite)?

A

Cheyletiella spp.

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19
Q

what is the genus and species name for the mange mite?g

A

Sarcoptes scabiei

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20
Q

what can Cheyletiella spp. cause?

A

Alopecic dermatitis

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21
Q

what can sarcoptes scabiei cause?

A

Severe dermatitis

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22
Q

what is the genus and species for the Follicular Mange Mite?

A

Demodex spp.

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23
Q

what can demodes spp. caues?

A

Severe dermatitis

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24
Q

what family are biting lice from?

A

Mallophaga

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25
Q

which family is Trichodectes canis from?

A

mallophaga

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26
Q

what is the genus and species of the dog biting louse?

A

trichodectes canis

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27
Q

what internal parasite is trichodectes canis the intermediate host for?

A

diplydium caninum

28
Q

what can trichodectes canis cause?

A

dermatitis

rough hair coat

29
Q

what family are sucking lice from?

A

anoplura

30
Q

what is the genus and species name for the dog sucking louse?

A

Linognathus setosus

31
Q

what family is Linognathus setosus from?

A

anoplura

32
Q

what can linoganthus setosus cause? (3)

A

dermatitis
rough hair coat
anemia

33
Q

what is acariasis?

A

infestation w/ ticks or mites

34
Q

what family are hard ticks from?

A

Family ixodidae

35
Q

what family are soft ticks from?

A

Family Argasidae

36
Q

which tick family do both sexes engorge them selves?

A

argasidae (soft ticks)

37
Q

what is another name for the hard shell of a tick?

A

scutum

38
Q

what is the genus and species name for the brown dog tick?

A

Rhipicephalus sanguineus

39
Q

what family is rhipicephalus sanguineus from?

A

ixodidae

40
Q

what can rhipicephalus sanguineus cause in an animal?

A

anemia

tick paralysis

41
Q

what causes tick paralysis

A

neurotoxins

42
Q

what can rhipicephalus sanguineus transmit?

A

babesia ehrlichia (lyme disease)

43
Q

what is the causative organism of lyme disease?

A

Borrelia burgdorferi

44
Q

what tick family transmits lyme disease

A

Ixodes spp.

45
Q

what is the causeative organism for rocky mountain spotted fever?

A

Rickettsia rickettsii

46
Q

which ticks transmit Rickettsia rickettsii through bite? (2)

A
  1. Dermacentor variabilis

2. Dermacentor andersoni

47
Q

which tick is a concern for transmission in eastern US?

A

Dermacentor variabilis

48
Q

which tick is a concern for transmission in western US?

A

Dermacentor andersoni

49
Q

what is the genus and species name for the “Rabbit bot fly” and “Rodent botfly”

A

Cuterebra spp.

50
Q

what is the genus and species for the bot fly?

A

gastrophilus sp.

51
Q

where does gastrophilus sp. lay their eggs?

A

hair shaft of legs and face

52
Q

what is the genus and species for the Horn fly?

A

Siphona spp.

53
Q

which fly species feed on tears, mucus, saliva, lymph

A

Siphona spp.

54
Q

what fly species feed with their head down?

A

Siphona spp.

55
Q

what is the genus and species of the horse fly?

A

Tabanus spp.

56
Q

which fly is a painful biter?

A

tabanus spp.

57
Q

why is the tabanus a painful biter?

A

Has scissor-like mouth parts that lacerate the skin

58
Q

which fly species has only female feed on blood?

A

tabanus spp.

59
Q

what are the common nameds for Hypoderma lineatum? (3)

A

“Cattle bot fly”
“Cattle grub”
“Warble fly”

60
Q

which fly species travels through the esophagus and spinal canal?

A

hypoderma lineatum

61
Q

which fly species looks like a honey bee?

A

hypoderma lineatum

62
Q

which fly species should you avoid treating for in the late fall?

A

hypoderma lineatum

63
Q

what is myiasis (strike)?

A

presence of fly larva in flesh

64
Q

what is some common names for blow fly? (2)

A

“Sheep bottle fly”

“Sheep blowfly

65
Q

which fly species causes myiasis (strike)?

A

blow fly

Clinical Pathology/Parasitology (13 decks)

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