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20- SA- Dermatology > Pruritic ectoparasitic disease > Flashcards

Pruritic ectoparasitic disease Flashcards

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Dermatology Board Prep flashcards
1
Q

describe flea allergic dermatitis

A

Pruritus associated with hypersensitivity to salivary proteins of flea (Type I +/or Type IV)
Leads to self trauma by pet

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2
Q

where are fleas generally found on the dog

A

caudal half of the body (tail base, thighs, inguinal area)
dorsum

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3
Q

Describe how to demonstrate the presence of fleas on animal

A

Flea comb
Vigorous coat brushing – examine debris on moistened paper –> red/brown tinge

Therefore failure to detect fleas - is unrealiable

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4
Q

What is the best diagnostic test for fleas

A

response to therapy

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5
Q

what part of the flea lifecycle occurs on the animal

A

only the adult part

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6
Q

is intradermal testing useful for FAD

A

it tests for hypersensitivity, not infestation

it is prone to false positive reactions

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7
Q

Descrube how can we treat fleas

A

isoxazoline for all in contact animals and treat the environment

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8
Q

what is the chewing lice in cats

A

Felicola species

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9
Q

chewing lice in dogs

A

Trichodectes canis

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10
Q

sucking lice in dogs

A

Linognathus setosus

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11
Q

List the classical signs of lice infestation

A

often asymptomatic - may see poor coat, scaling, papulea, crusts, variable pruritus
Heavy infestation –> anaesmia, lethargy

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12
Q

How do we diagnose lice infestation

A

coat combing/ brushing or hair plucks (for eggs)

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13
Q

Describe how to treat lice

A

selamectin/fipronil/imidacloprid - trea animal and all in-contacts

environmental cleaning

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14
Q

what does sarcoptes look like

A

round mite with 8 short legs

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15
Q

List the classical signs of sarcoptes

A

intense pruritus
papules and crusts esp pinnal margins, elbows, hocks, sternum, other areas can be affected

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16
Q

Describe how to diagnose Sarcoptes

A

superficial skin scraping
IgG serology (ELISA)
Therapeutic trial - justified if disease suspected

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17
Q

Describe how we can treat sarcoptes

A

sarolaner, afocolaner, fluralaner- animal and in contacts
Treat environment +cleaning

18
Q

what does cheylitiella look like

A

heart-shaped body with 8 long legs

19
Q

List the classical clinical signs of cheylitiella

A

pruritus and scale especially dorsal trunck

20
Q

DEscribe how to diagnose cheylitiella

A

superficial skin scraping
microscopy of scale from combing
unstained acetate tape strip on the skin
trichogram for eggs

False -ves common- so trial treatment if suspect

21
Q

List the licensed teeatments for cheylitiella

A

There are none

22
Q

List 3 products that are effective against cheylitiella

A

isoxazolines
selamectin
moxidectin

23
Q

List the classic sign of otodectes

A

ear irritation
head shaking
excessive ear wax
occasional irritationof face, body

24
Q

Decsribe how to diagnose otodectes

A

see mites on otoscopy
see mites/eggs on microscope or cerumen

25
Q

Describe how to treat otodectes

A

selected isoxazolines (sarolaner, fluralaner, afoxolaner) / selamectin/ moxidectin systemically

or can use acricidal ear drops

26
Q

what does neotrombicula look like

A

orange parasite, visible to the naked eye, 6 long legs, 2 body parts

27
Q

Lst the clinical signs of neotrombicula

A

papules, crusts, pruritus- especially interdigital spaces, pinnae, ventral abdomen

28
Q

are there any licensed products for neotrombicula

A

No

29
Q

Describe how to treat neotrombicula

A

fipronil spray every 2 weeks
selacmectin spot-on
isoxazolines

30
Q

what do demodex look like

A

long bodies mites- cigares

31
Q

List the two most canine demodex mites

A

D. canis and D. injai

32
Q

List the classic demodicosis clinical signs

A

intense pruritus especially on the face and dorsum, often greasy coat with mild hair loss

33
Q

List two feline demodex mites

A

D. cati and D. gatoi

34
Q

List the classic D. cati clinical signs

A

erythema
papules
pustules
alopecia

35
Q

List classic D. gatoi clinical signs

A

over-grooming, pruritus, alopecia, scaling, erythema

36
Q

Describe the treatment for feline demidicosis

A

sarolaner, flurolaner

37
Q

which demodex needs treatment of in contacts as well

A

D. gatoi

38
Q

A 4yr Boxer presents with dorsal pruritus and scale. What are your top two differential diagnoses

A

Flea allergic dermatitis
cheyletiellosis

39
Q

How diagnose Neotrombicula autumnalis

A

see orange dots with naked eye
superficial skin scrape into liquid paraffin if microscopy needed

40
Q

How to diagnose demodex injai and canis

A

deep skin scrapings
hair plucks

20- SA- Dermatology (21 decks)

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