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BVSc2 AD1 > Ectoparasites > Flashcards

Ectoparasites Flashcards

1
Q

What is a simple life cycle called?

A

Hemimetabolous

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2
Q

What is a complex life cycle called?

A

Holometabolous

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3
Q

What happens in a hemimetabolous life cycle

A

Egg - nymph - grows - lays eggs

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4
Q

What happens in a holometabolous life cycle

A

egg - larva - protonymph - tritonymph - adult

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5
Q

WHat is the head of a mite called?

A

gnathsoma

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6
Q

What is the body of a mite called?

A

idiosoma

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7
Q

What is the end of the leg called?

A

pulvillus

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8
Q

Sarcoptidae characteristics?

A 
scabies mites
astigmata order
Short legs
long suckers
large eggs
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9
Q

What do scabies mites do?

A

burrow into epidermis - itches

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10
Q

What animal do scabies infect?

A

dogs and pigs

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11
Q

What mite infects birds?

A

knemidokoptidae - depluming itch

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12
Q

Psoroptidae characteristics?

A

mite
astigmata order
long legs
pedicels at ends

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13
Q

What is the main host of psoroptidae?

A

sheep

causes sheep scab

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14
Q

What animal does chorioptes infect?

A

Cows and horses - lower limbs mite infection

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15
Q

What does otodectes do?

A

Mite that infects dog/cat ear canal

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16
Q

where do demodex mites live?

A

In the hair follicles and sebaceous glands

Deep skin scraping

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17
Q

WHat animal do demodex mites infect?

A

Dogs

cant live off host

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18
Q

What symptoms do demodex mites cause?

A

Hair loss

no itching usually

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19
Q

What animal do mesostigmata infect?

A

Poultry

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20
Q

What is the more common poultry mite?

A

red mite

dermanyssus gallinae

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21
Q

What symptoms does dermanyssus cause?

A

anaemia
irritant
decreased egg production

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22
Q

How do you treat dermanyssus mites?

A

spray with avermectin

can live a very long time in environment so deep clean environment

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23
Q

what order are dermanyssus mites in?

A

Mesostigmatid mites

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24
Q

What order are ticks in?

A

Metastigmata

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25
Q

What mouth part help ticks latch onto skin?

A

chelicera

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26
Q

What do ticks produce to help them stay on host?

A

Glycoproteins

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27
Q

What is a tick plate called?

A

Scutem

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28
Q

What organ does the tick have to detect hosts/quest?

A

hallers organ

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29
Q

What is the most common tick?

A

Ixodes ricinus

30
Q

What are the characteristics of ixodes?

A

ticks have a scutem

31
Q

What is the life cycle of ixodes like?

A

3 host life cycle

larvae to nymph to adult

32
Q

What is important to note about dermacentor reticulatus?

A

It carries babesia canis

33
Q

What is different about rhipicephalus?

A

Likes warmer temps so lives indoors

34
Q

What is the life cycle of a flea?

A

egg - larva - pupa - adult

35
Q

How many sets of legs does a flea have?

A

3

36
Q

How many legs does a mite have?

A

larva - 3 pairs

older - 4 pairs

37
Q

WHere do fleas live

A

lay eggs on host
larva live in environment eg. carpet
pupa quiescent until hatch
Adult lives on host - needs to keep feeding

38
Q

What symptoms do fleas cause?

A

pruritus
hypersensitivity
anaemia

39
Q

What is the most common type of flea?

A

cat flea - even on dogs

ctenocephalides felis

40
Q

What is important about the rabbit flea?

A

can carry myxomatosis

41
Q

What are the features of the cat flea?

A

flattened head

same length combs

42
Q

What is a louse infestation called?

A

pediculosis

43
Q

What symptoms do lice cause?

A

pruritus
alopecia
exoriation
anaemia

44
Q

What are the two different types of lice?

A

sucking lice - anopleura

chewing/biting lice - mallophaga

45
Q

What is the life cycle of lice?

A

nits - larvae - nymph - adult

46
Q

What chewing lice affect sheep and cows?

A

bovicola

47
Q

What do bovicola cause in sheep?

A

wool matting, wounds, attract blowfly

48
Q

What chewing lice affect dogs?

A

Trichodectes canis

49
Q

What chewing lice affect poultry?

A

menacanthus stramineus most common

severe irritation - feed on blood from quills

50
Q

What are the two sucking lice?

A

haematopinus

linognathus

51
Q

What animals does haematopinus affect?

A

Pigs, horses and cows

52
Q

What animals does linognathus affect?

A

sheep cattle and dogs

53
Q

What is the life cycle of a fly?

A

eggs - larvae (molts a few times) - pupae - adult

54
Q

What is the latin name for a botfly?

A

oestrus ovis

55
Q

what is a botfly life cycle?

A 
Lays them inside itself 
Then sprays them in nasal opening
Larvae migrate into frontal sinus
leave via sneezing
finish life cycle in environment
56
Q

What is the major fly species that affects horses?

A

Gasterophilus

57
Q

What is the life cycle of gasterophilus?

A 
Lay eggs on distal limbs
Horses lick them off
This stimulates the eggs to hatch
Larvae crawl into mouth
Sit in mucosa or tongue
Swallowed and live in gastric mucosa
58
Q

What is the latin name for warble fly?

A

hypoderma

59
Q

What species does the warlbe fly affect and how?

A

Cow
L3 larvae in warble under skin
affects the leather - holes

60
Q

What fly causes flystrike in sheep?

A

Blowfly

Lucilia sericata

61
Q

What is the life cycle of blowfly?

A

Eggs hatch after 12-24hrs
Larvae feed for 3 days
Drop off to form pupae

62
Q

What makes animals more susceptible to blowfly strike?

A

Longer fleece length
More soiling around back end
Ambient condition

63
Q

What animals are affected by lucilia sericata?

A

Sheep and rabbits

64
Q

What is the latin name for horse flies?

A

Tabanidae

65
Q

What are the main biting flies?

A

Horse fly
Stable fly
Sheep ked
Forest fly

66
Q

What do non biting flies cause?

A

Irritation
broken head - rubbing head breaks skin
feed on body fluid

67
Q

What is the latin name for the face fly?

A

Musca autumnalis

68
Q

What can face flies cause?

A

infectious bovine keratoconjunctivitis - pink eye/new forest eye

69
Q

What does sand flies carry?

A

Leishmaniasis

70
Q

What is the latin name for midges?

A

culicoides

71
Q

What can midges cause?

A

Sweet itch
skin disease in the dorsal tail base area
females feed on blood

72
Q

What is the life cycle of a midge?

A

egg - aquatic larvae - pupa - adult

BVSc2 AD1 (12 decks)

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