Dermatophytosis describes dermal infection with one of a number of fungal organisms. The confusing name “ringworm” has been used as a blanket term to describe these infections.Commonly identified organisms include Microsporum canis, Microsporum gypseum & Trichophyton mentagrophytes.Clinically, affected patients display erythematous and/or crusting dermatitis, with or without secondary bacterial infection. Changes frequently affect the face, periocular tissues, pinnae and/or forelimbs. Chronic lesions may display alopecia and/or lichenification.Both canine and feline species of any breed or crossed breed may be affected. Commonly affected breeds include the Jack Russell Terrier & Yorkshire Terrier.