1. DERMATOPHYTOSIS IN DOGS
SYN.: RINGWORM

2. INTRODUCTION
Fungal infection of the skin , hair or nail cause by specie of microsporum, Trichophyton or Epidermophyton .
Disease is self limiting in most healthy Animals.

3. AETIOLOGY Microsporum canis ( major cause ) 64.9%
Trichophyton mentagrophytes (mouse /vole) 24.2%
Trichophyton erimacei (hedgehog ) 4.4%
Microsporum persicolor (Mouse/vole ) 3.9%
Trichophyton verrucosem (cattle) 2.6%
Trichophyton terrestre ( soil ) 2.6%
Microsporum gypsum 2.6%

4. TRANSMISSION Direct contact with infected animal
Indirect : formites ( combs & brushes )
Desquamated material free in the environment.
Spores may remain viable for more than a year.

5. CLINICAL SIGNS
Most common finding is one or more patches of alopecia with an erythromatous border and scaling .
In long – haired dogs e.g Yorkshire terriers generalized Seborrhoeic dermatitis with only partial hair loss.
Multiple circular , fairly thick crust adhere to the base

6. CLINICAL SIGNS contd Papules and pustules with alopecia or scaling
Lesions mostly around the head, neck, base of tail & extreme ties.
Some lesions presents as acutely inflamed skin oozing pus
Nail may be affected ( onychomycosis ) leading to deformity and Shedding.
Hyperpigmentation in chronic cases

7. DIAGNOSIS Clinical signs & history Wood lamp examination
Microscopic examination
Culture ( SDA)

8. DIFFERENTIAL DIAGNOSIS
Demodicosis

9. TREATMENT Griseofulvin
Contraindicated in pregnancy (tetatogenic especialy early pregnancy).

10. ADJUNCT THERAPY Enilconazole 0.2% qid
Ketoconazole 5 -10ing / kg 0d or bid
Side effect: vomiting , pruritus & hepatotoxicity)