Dermatology workshop

Question 1

What are Ddx for pruritus, alopecia, plaques + miliary dermatitis in cats?

Answer 1

• Feline Atopic Skin Syndrome
• Bacterial infection
• Parasites
• Fungal skin disease
• Crusting disease

Question 2

CS of pemphigus foliaceus?

Answer 2

• Pustules and crusting major signs
• Lesions symmetrical
• Pruritus not always a feature
• Acantholytic keratinocytes on cytology

Question 3

CS of dermatophytosis?

Answer 3

• Contagious (including zoonotic potential)
• Alopecia major sign, also scaling
• Lesions multifocal & non-symmetrical
• Variable onset, often very young age
• Pruritus less common

Question 4

CS of pox virus?

Answer 4

• Contagious (including zoonotic potential, though rare)
• Ulcers and crusting major signs
• Lesions multifocal & non-symmetrical
• Usually, a herald patch (from rodent bite)
• Usually hunting cat
• Pruritus uncommon
• Steroids can lead to fatal viral pneumonia

Question 5

What test would rule out what with skin issues?

Answer 5

• Coat brushings and wet paper test = flea infestation
• Acetate tape test +/- superficial skin scrape = demodex gatoi
• Indirect/direct impression smear cytology from exudative area = bacterial infection
• Hair plucks + culture = dermatophytosis
• Ectoparasite eradication trial = flea bite hypersensitivity + D. gatoi
• Elimination diet = food induced FASS

Question 6

Whats the problem with cyclosporin?

Answer 6

• If acute problem = takes 4-8weeks to see effect = too slow

Question 7

If owner struggles to give prednisolone, what should be done?

Answer 7

• Consider dexamethasone = more potent = need to give less often

Question 8

What ectoparasiticide can target fleas, ticks + mites?

Answer 8

• Fluralaner - isoxazolines

Question 9

Ddx for pruritus, alopecia, erythema + lichenification in older dogs?

Answer 9

• Allergic skin disease - CAD
• Parasites - flea, trombiculiasis, sarcoptic mange, demodicosis, chelytiellosis
• Microbial infection - malassezia / bacterial overgrowth
• Other = epitheliotropic lymphoma + pemphigus foliaceus

Question 10

What are favrot’s criteria for CAD?

Answer 10

• Age at onset <3yrs
• Mostly indoor
• Alesional pruritus at onset
• Affected front feet
• Affected ear pinnae
• Non-affected ear margins
• Non-affected dorso-lumbar area

Question 11

What are Ddx for PU?PD?

Answer 11

• Iatrogenic HAC
• Naturally occurring HAC
• Metabolic disease e.g. diabetes mellitus
• Urinary tract infection
• Other endocrinopathy e.g. hypothyroidism
• Other internal disease e.g. CKD