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Malassezia dermatitis in dogs - Coggle Diagram
Malassezia dermatitis in dogs
Clinical signs
erythema +/- papules
scaling
greasy exudation
hyperpigmentation/lichenification
malodour
paronychia--> crusting, discoloured claw
frenzied facial pruritus--> cheilitis/muzzle erythema
Predisposing factors favouring the yeast
breed--> Basset Hounds
cutaneous hypersensitivity disorders
primary and secondary cornification defects
endocrine dz
folds--> Bulldogs
climate
atopic dermatitis
immunity to Malassezia spp in atopic dermatitis
Scotch tape method
Outcome and interpretation
symptoms/skin lesions gone + no yeast --> misdiagnosis, look for cause
partial improvement + no yeast --> misdiagnosis, treat residual disease
no improvement + no yeast --> incidental yeast presence
partial improvement + decreased yeast --> suspected misdiagnosis/ extend treatment/ review compliance
no improvements + yeast --> review compliance, change treatment, resistance
Culture media
dogs: modified Dixon's agar at 32-37 degrees C for =/> 3d
cats: modified Dixon's agar at 32-34 degrees C for =/> 7d
Topical therapy in dogs
2% miconazole- 2% chlorhexidine first choice
3% chorlhexidine
chlorhexidine +/- climbazole mousse/wipes
Systemic therapy in dogs
itraconazole or ketoconazole
fluconzole
terbinafine
recommendations for azoles
Prevention
correct underlying disease
consider intermittent topical therapy
consider pulse systemic therapy
consider allergen-specific immunotherapy
Zoonotic
human infections rare
overall risk low
hand hygiene!!
