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Parasitology > Lecture 10: Mite Infestations > Flashcards

Lecture 10: Mite Infestations Flashcards

1
Q

main difference between mites and ticks

A

mites are microscopic
ticks macroscopic

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2
Q

adults and nymphs have how many legs

A

8

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3
Q

larvae have how many legs

A

6

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4
Q

mites: life cycle

A

egg –> prelarva (non feeding) –> larvae –> nymph –> adult

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5
Q

3 mite orders

A

parasitiformes/mesostigmata
sarcoptiformes/astigmata
trombidiformes/prostigmata

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6
Q

which mite order includes blood feeders

A

parasitiformes/mesostigmata

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7
Q

palps definition

A

sensory mouthparts

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8
Q

chelicerae: mesostigmata vs astigmata

A

mesostigmata = piercing/sucking mouthparts
astigmata = claw like feeding mouthparts

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9
Q

mesostigmata and astigmata: morphology in common (5)

A

oval shape, dorsoventrally flattened body
8 legs
tarsus at end of leg
palps
chelicerae

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10
Q

chelae definition

A

scissor like structures

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11
Q

what kind of feeders are mesostimata

A

blood feeders

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12
Q

mesostigmata: unique feature

A

chelae on ends
2 stigma

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13
Q

asigmata: unique features

A

setae = elongate hairs (sensory)
tubercules and copulatory suckers in males

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14
Q

prostigmata have how many legs

A

4 pairs of legs

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15
Q

prostigmata: 2 main species

A

demodex
eutrombicula

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16
Q

demodex: generic name, 2 main anatomical components

A

follicle mite
gnathosoma = head
idiosoma = body

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17
Q

eutrombicula: generic name

A

chiggers

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18
Q

mite infestation can result in (5)

A

dermatitis
allergic reactions
loss of blood/body fluids
otitis externa
transmission of pathogens to humans

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19
Q

diagnosis of mite infestations (3)

A

clinical signs = mange/dermatitis, allergic reactions, tissue trauma
direct visualization –> microscopic exam
taxonomic ID

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20
Q

how to prevent mite infestations (3)

A

clip hair/clean ears
medicated shampoos
regularly clean fomites

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21
Q

main treatment for mite infestations

A

acaricides (ivermectin, fipronil, permethrin)

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22
Q

mites: symptomatic treatment for (2)

A

pruritis
secondary bacterial infections

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23
Q

larvae vs nymphs vs adults: number of legs

A

larvae = 6 leggs
nymphs = 8 legs
adults = 8 legs

24
Q

how many nymphal stages do all mites have

25
3 nymphal stages
protonymph deutonymph tritonymph
26
do all life cycle stages feed
no
27
general life cycle steps
eggs --> larvae --> protonymph --> deutonymph --> tritonymph --> adults
28
how are mites primarily transmitted
direct contact
29
how do mites of vet importance infest animals (3)
feed externally on host reside/feed subcutaneously reside/feed in internal tissues
30
external mites that are blood feeders (2)
ornithonyssus suylvarium dermanyssus gallinae
31
ornithonyssus sylvarium: generic name, hosts, where does life cycle take place
northern fowl mite poultry and wild birds entire cycle on host
32
dermanyssus gallinae: generic name, hosts
red poultry mite wild and domestic birds
33
external mites that are piercing tissue feeders (1 species)
eutrombicula alfreddugsei
34
eutrombicula alfreddugsei: general name, which form is parasitic, which forms/stages are free living, clinical signs
common chigger many hosts orange crusting dermatosis intense pruritis, erythema, papules only larval form is parasitic nymphs and adults free living
35
external mites that reside/feed on surface ( 6 species)
psoroptes ovis chorioptes bovis psorobia ovis psorobia bos cheyletierlla species lynxacarus radovskyi
36
pseroptes ovis: generic name, hosts, where life cycle is spent
scab mite sheep, cattle, horses entire life cycle on host
37
chorioptes bovis: generic name, hosts (5), where life cycle is spent
chorioptic mange mite cattle, horses, sheep, goats, rabbits entire cycle on host
38
psorobia ovis: generic name, host, where life cycle spent
sheep itch mite sheep entire life cycle on host
39
psorobia bos: generic name, host, where life cycle spent
cattle itch mite cattle entire cycle on host
40
cheyletiella species: generic name/aka, hosts = 3 different species, how transmitted
fur mites/walking dandruff dogs = C. yasguri cats = C. blakei rabbits = C. parasitivorax very contagious through direct contact
41
lynxcarus radovskyi: generic name, host
cat fur mite cat
42
mite that resides in hair follicle
demodex species
43
demodex: hosts, where life cycle spent, where burrows
host specific, most domestic mammals entire life cycle on host hair follicles and sebaceous glands
44
3 mites that burrow into skin
sarcoptes scabiei notoedres cati knemidocoptes mutans
45
sarcoptes scabiei: generic name, hosts, where life cycle spent
sarcoptic mange mites most domestic animals entire life cycle on host
46
notoedres cati: generic name, host
cats feline scabies mite
47
knemidocoptes mutans: generic name, hosts
scaly leg mite chickens, turkeys, wild birds
48
mites that reside internally (4 species)
otodectes cynotis raillietia auris pneumonyssoides caninum sternostoma tracheacolum
49
otodectes cynotis: generic name, hosts
ear mite cats and dogs
50
raillietia auris: generic name, host
cattle ear mite cattle
51
pneumonyssoides caninum: host, generic name
canine ear mite dogs
52
sternostoma tracheacolum: generic name, hosts
avian nasal mite wild and domestic birds
53
environmental mite species
pyemotes tritici
54
pyemotes tritici: generic name, where found
hay itch mites straw, grain, hay
55
which mite is also called walking dandruff
cheyletiella
56
5 main types of mange
otodectic sarcoptic walking dandrugg notoedric demodectic

Parasitology (10 decks)

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