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General Parasitology > Ectoparasites 3 > Flashcards

Ectoparasites 3 Flashcards

1
Q

what is another name for Cheyletiellosis?

A

walking dandruff

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2
Q

are Cheyletiellosis host specific?

A

no
highly contagious

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3
Q

what are the pathomechanisms of Cheyletiellosis spp?

A

inflammation
hypersensitivity
damage skin barrier

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4
Q

which Cheyletiellosis sp infects dogs and what does its dorsal soledidion on genu 1 look like?

A

Ch. yasguri
heart shaped

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5
Q

which Cheyletiellosis sp infects cats and what does its dorsal soledidion on genu 1 look like?

A

Ch. blakei
conical

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6
Q

which Cheyletiellosis sp infects rabbits and what does its dorsal soledidion on genu 1 look like?

A

Ch. parasitivorax
globe

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7
Q

what are the clinical features of Cheyletiellosis spp?

A

none to severe pruritus
scaling
erythema
alopecia
seborrhea
cats: skin reaction patterns
papules
crusting

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8
Q

how do you treat Cheyletiellosis spp?

A

avermectins
lime sulfur dips
fipronil (not in rabbits)
off label isoxazolines

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9
Q

how do you diagnose Cheyletiellosis spp?

A

acetate tape or superficial skin scrape
dermoscope

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10
Q

what causes sarcoptic, psoroptic, and chorioptic mange in dogs, cats, exotic, and farm animals?

A

superficial mites
class arachnida

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11
Q

what are the pathomechanisms of sarcoptic, psoroptic, and chorioptic mange?

A

inflammation
hypersensitvity
damage skin barrier
irritation

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12
Q

how can you use the epimeres to distinguish between Sarcoptes/Notoedres sp, Otodectes sp, and Psoroptes/Chorioptes sp?

A

Sarcoptes/Notoedres sp: only first epimere fuse: Y shape
Otodectes sp: first and second epimere fuse: triangular shape
Psoroptes/Chorioptes sp: epimere do not fuse

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13
Q

what species causes sarcoptic mange in dogs?

A

Sarcoptes scabiei var. canis

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14
Q

what is the distribution of skin lesions in a dog with sarcoptic mange?

A

hocks
elbows
ears
inguinal region

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15
Q

what skin lesions can be seen with sarcoptic mange?

A

pruritus
erythema
papules/pustules
scaling
alopecia
crusts
excoriations
lichenification
hyperpigmentation

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16
Q

how is sarcoptic mange diagnosed (after history and exam)?

A

superficial skin scrapings: 50-80% false negatives
serologic test
therapeutic trial
pinnal-pedal reflex
histopathologic examination

17
Q

what are signs of Notoedric mange in cats?

A

severe pruritus
alopecia
erythema
excoriations
papules
crusts
scaling
lichenification
secondary infections

18
Q

where are skin lesions seen with Notoedric mange in cats?

A

pinnae
face, neck
feet, perineum

19
Q

who does Otodectes cynotis infect?

A

dogs
cats
ferrets

20
Q

where does Otodectes cynotis impact?

A

ear mite
might extend to neck, rump, tail

21
Q

who does Psoroptes cuniculi infect?

A

rabbits
may affects goats, sheep, horses

22
Q

where does Psoroptes cuniculi impact?

A

external ear canal

23
Q

who does Trixacarus caviae infect?

A

guinea pigs
most pathogenic ectoparasite of

24
Q

what does Trixacarus caviae cause?

A

intense pruritus (can be seizure-like)
alopecia
scaling
crusts

25
Q

where on the animal does Trixacarus caviae impact?

A

ventral abdomen
neck
shoulders
generalized

26
Q

what causes Psoroptic mange?

A

Psoroptes ovis

27
Q

who does Psoroptes ovis infect?

A

bovine
caprine
ovine
horses
rabbits

28
Q

what does Psoroptes ovis cause?

A

intense pruritus
alopecia
erythema
scales
yellow-green pustules
thick yellowish crusts
economic losses

29
Q

where does Psoroptes ovis impact?

A

head
shoulders
back
rump
entire body

30
Q

what causes Chorioptic mange?

A

Chorioptes bovis

31
Q

who does Chorioptes bovis infect?

A

bovine
caprine
ovine
horses
rabbits

32
Q

what does Chorioptes bovis cause?

A

variable pruritic
alopecia
erythema
scales
papules
crusts

33
Q

which horse breeds are predisposed to Chorioptic mange?

A

horse breeds with feathered fetlocks

34
Q

where does Chorioptes bovis impact?

A

tail, distal limbs
generalized: legs, ventrum

35
Q

which two parasites are worse in winter?

A

Psoroptes ovis
Chorioptic bovis

36
Q

which diseases have severe pruritis associated with them?

A

Trixacarus caviae
Notoedric mange
Sarcoptic mange
Psoroptic mange

37
Q

which diseases/mites have variable pruritis associated with them?

A

Cheyletiellosis spp
Otodectes cynotis
Psoroptes cuniculi
Chorioptic bovis

General Parasitology (17 decks)

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