SAEVA Proceedings 2015 | Page 86

South African Equine Veterinary Association Congress 2015  Protea Hotel  Stellenbosch Pastern dermatitis and beyond Annette Petersen* Associate Professor of Dermatology Department of Small Animal Clinical Sciences, Michigan State University, East Lansing, Michigan, 48824-1314, Email: [email protected] Pastern dermatitis syndrome: • • • • • • Not a single disease but a cutaneous reaction pattern Has primary and secondary causes Infectious (viral, bacterial, fungal, parasitic) Immune (vasculitis)/allergic disorders Traumatic disorders Contact dermatitis (Urine scalding; iatrogenic “medication”) Photodermatitis/ sunburn (plants/ hepatic) •    Dry form “Scratches”: alopecia, erythema, scales ,crusts Moist form “Grease heel”: erythema, erosions, alopecia, serous to purulent crusting dermatitis Chronic form “Grapes”: excessive granulation tissue Infections Viral: Viral papilloma Horse pox /Vaccinia Bacterial: Dermatophilus congolensis Staphylococcus spp Streptococcus spp Fusobacterium necrophorum Fungal: Dermatophytes Malassezia spp Parasitic: Chorioptic mange mites Poultry mites Forage /harvest mites Myiasis Pelodera spp. Helminth Habronemiasis Chorioptes Diagnosis: clinical signs,breed , skin scrapings or tape preps Treatment    Clip!! Remove crusts Antiparasitic agents  Fipronil Spray ( Frontline)  Lime sulfur 86