الفهرس 
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Abstract
This study was performed in Internal Medicine & Infectious and Fish Diseases Dept. Faculty of Veterinary. Medicine, Mansoura University:- This study was carried on a total number of 3014 equine species of which 1880 horses and 1134 donkeys were examined clinically, mycologically, bacteriologically and parasitologically for the presence of infectious skin diseases allover one year from March 2009 to February 2010. Examination of these equines revealed that 258(8.57%) out of 3014 animals suffered from skin affections which diagnosed as dermatophytosis (3.52%) , Sweet itch (2.19%) , Mange (1.46%) , bacterial dermatitis (0.36% ), Cutaneous Habronemiasis (0.27%), vitiligo (0.2%) , allergic dermatitis (0.2%), urticaria (0.17%), tick allergy (0.13%) and equine warts (0.07%). Dermatophytosis was diagnosed in 106 animals and it was more prevalent in horses of age lower than one year especially in Arabian horse farms, and mostly in fall and winter seasons. The fungal isolation revealed that T.equinum was the most common dermatophyte species isolated from equine.. The risk factors associated with high occurrence of Dermatophytosis in Arabian horse studs was age, humidity, grooming and close contact in yard. Experimental treatment of Dermatophytosis in this study was conducted using herbal extract creams of Rhus and Neem seed in comparing to the conventional topical treatment Rhus extract was more effective in clinical and microbial recovery the same as Imaverol solution.