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BVSc2 AD1 > Ectoparasites > Flashcards

Ectoparasites Flashcards

(72 cards)

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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
What mouth part help ticks latch onto skin?
chelicera
26
What do ticks produce to help them stay on host?
Glycoproteins
27
What is a tick plate called?
Scutem
28
What organ does the tick have to detect hosts/quest?
hallers organ
29
What is the most common tick?
Ixodes ricinus
30
What are the characteristics of ixodes?
ticks have a scutem
31
What is the life cycle of ixodes like?
3 host life cycle | larvae to nymph to adult
32
What is important to note about dermacentor reticulatus?
It carries babesia canis
33
What is different about rhipicephalus?
Likes warmer temps so lives indoors
34
What is the life cycle of a flea?
egg - larva - pupa - adult
35
How many sets of legs does a flea have?
3
36
How many legs does a mite have?
larva - 3 pairs | older - 4 pairs
37
WHere do fleas live
lay eggs on host larva live in environment eg. carpet pupa quiescent until hatch Adult lives on host - needs to keep feeding
38
What symptoms do fleas cause?
pruritus hypersensitivity anaemia
39
What is the most common type of flea?
cat flea - even on dogs | ctenocephalides felis
40
What is important about the rabbit flea?
can carry myxomatosis
41
What are the features of the cat flea?
flattened head | same length combs
42
What is a louse infestation called?
pediculosis
43
What symptoms do lice cause?
pruritus alopecia exoriation anaemia
44
What are the two different types of lice?
sucking lice - anopleura | chewing/biting lice - mallophaga
45
What is the life cycle of lice?
nits - larvae - nymph - adult
46
What chewing lice affect sheep and cows?
bovicola
47
What do bovicola cause in sheep?
wool matting, wounds, attract blowfly
48
What chewing lice affect dogs?
Trichodectes canis
49
What chewing lice affect poultry?
menacanthus stramineus most common | severe irritation - feed on blood from quills
50
What are the two sucking lice?
haematopinus | linognathus
51
What animals does haematopinus affect?
Pigs, horses and cows
52
What animals does linognathus affect?
sheep cattle and dogs
53
What is the life cycle of a fly?
eggs - larvae (molts a few times) - pupae - adult
54
What is the latin name for a botfly?
oestrus ovis
55
what is a botfly life cycle?
``` Lays them inside itself Then sprays them in nasal opening Larvae migrate into frontal sinus leave via sneezing finish life cycle in environment ```
56
What is the major fly species that affects horses?
Gasterophilus
57
What is the life cycle of gasterophilus?
``` 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
What is the latin name for warble fly?
hypoderma
59
What species does the warlbe fly affect and how?
Cow L3 larvae in warble under skin affects the leather - holes
60
What fly causes flystrike in sheep?
Blowfly | Lucilia sericata
61
What is the life cycle of blowfly?
Eggs hatch after 12-24hrs Larvae feed for 3 days Drop off to form pupae
62
What makes animals more susceptible to blowfly strike?
Longer fleece length More soiling around back end Ambient condition
63
What animals are affected by lucilia sericata?
Sheep and rabbits
64
What is the latin name for horse flies?
Tabanidae
65
What are the main biting flies?
Horse fly Stable fly Sheep ked Forest fly
66
What do non biting flies cause?
Irritation broken head - rubbing head breaks skin feed on body fluid
67
What is the latin name for the face fly?
Musca autumnalis
68
What can face flies cause?
infectious bovine keratoconjunctivitis - pink eye/new forest eye
69
What does sand flies carry?
Leishmaniasis
70
What is the latin name for midges?
culicoides
71
What can midges cause?
Sweet itch skin disease in the dorsal tail base area females feed on blood
72
What is the life cycle of a midge?
egg - aquatic larvae - pupa - adult

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