Different dermatological problems with similar clinical signs

Different dermatological problems in the horse may produce similar clinical signs. The pathogens and pathogeneses of some dermatological diseases caus ing problems during the diagnosis under practice situations will be discuss ed. First, a horse with round, greyish, asbestos-like lesions will be discussed . Dermatophytosis, equine sarcoid and alopecia areata are in the differenti al diagnosis. Second, the horse with scabs on the lower limbs is presented. In this mulitfactorial problem, mange, bacterial dermatitis and immune-rel ated problems may play a role. Third, the horse with painful crusts on the back will be discussed. Here, dermatophilosis and staphylococcal dermatitis are in the list of differentials.