5 - Dermatophytosis Flashcards
Dermatophytosis
Cutaneous fungal infection
Dermatophytosis invades
Keratinized structures
Is dermatophytosis zoonotic
Yuh
What are the three classifications of dermatophytosis
Zoophilic, geophilic, anthropophilic
Zoophilic dermatophytes primarily infect
Animals
Zoophilic dermatophytes
Microsporum canis, trichophyton mentagrophytes
Geophilic dermatophytes
Micrososporum gypseum
Ectothrix spores of dermatophytes
Outside hair shaft , Zoophilic and geophilic
Most common genera of dermatophytes
Microsporum and trichophyton
If you think it looks like dermatophytosis it is
Staphylococcal pyoderma
How is dermatophytosis transmission
Micro trauma + exposure
Who can be asymptomatic carrier of dermatophytosis be
Natural host - cats and rodents
Pathophysiology of dermatophytosis
Invades keratin of anagen hairs, grows downward to above hair bulb, hair shaft weakens and breaks , spread to neighboring hair
Resting hair phase
Telogen hair
C/s of canine dermatophytosis
Circle patch, broken stubby hairs, scaling, mild erythema, Papules maybe, pruritits
What canine breed is predisposed to canine dermatophytosis
Yorkies
Differentials for a classic canine dermatophytosis lesion
Pyoderma and demodicosis and dermatophytosis
Kerion aka
Dermatophytes furunculosis
Kerion
Nodular dermal pyogranulomatous inflammation with draining tracts
Most common presentation of dermatophytes in dogs
Kerion
Most common feline dermatophytosis
M. Canis
What percent of strays are feline dermatophytosis positive
90
C/s of feline dermatophytosis
Patchy alopecia, crusting, scaling, on dace and ear, focal , NOT puritic
DX dermatophytosis
Woods light - only M. Canis fluorescent
What will dermatophytes loook like on phenol red culture media
Alkaline pH red
