N.M. AleyasMADHU RAJAN MATHEWS2020-03-032020-03-031999http://krishikosh.egranth.ac.in/handle/1/5810144136Fifty dermatological diseases in dogs presented to the University Veterinary Hospital, Kokkaiai and Veterinary College Hospital, Mannuthy were systematically investigated to find out the etiology. The results indicated that the conditions were mostly caused by bacteria and ectoparasites (42% each) and only a small proportion was caused by fungi (4%) and other factors (12%), Sixteen different clinical conditions were identified viz. Superficial Bacterial Folliculitis, Impetigo, Gentian Shepherd Pyoderma, Furunculosis, Infantile Pustular Dermatoses. Localised Demodicosis, Generalised Demodicosis. Flea Bite Hypersensitivity. Flea Bite Dermatitis, Tick infestation. Pediculosis. Dermatophytosis, Dermatomycosis produced by non-dermatophyte. Callus Pyoderma. Telogen Defluxion, Irritant Contact Dermatitis and Lentigo. Among the dogs which were investigated, non-descript ones were mostly affected probably due to lesser care and attention given to them. The results suggested that animals kept full time indoor or outdoor were almost equally affected whereas animals reared under semi intensive system were less prone to dermatological diseases In almost all conditions secondat^ lesions were predominant than primary lesions probably due to the delay in medical attention The only condition, with primary lesions alone, was lentigo. Lesions of bacterial dermatitis were pi'edominant in the abdomen, hind legs and trunk. In dermatophytosis. ear, trunk and hind legs were affected, where as in dermatomycosis, head, trunk, hind legs and fore legs were aiTected The lesions produced by ectoparasites were mostly in the back followed by trunk and fore legs No characteristic distribution of les'ons could be detected in other conditions, with an exception of callus pyoderma in which lesions were seen at the pressure points The different clinical bacterial dermatitis were produced by Staphylococcus imcrmediiis. Ectoparasitic conditions were mostly produced by I)ennkJex cams. followed by fleas, ticks and lice Some cases of the ectoparasitic conditions developed secondary bacterial infection with S. intermedius There were four clinical conditions, namely callus pyoderma, telogen defluxion, irritant contact dermatitis and lentigo caused by factors other than bacteria, fungi and ectoparasites The haematological and serum biochemical parameters studied did not suggest any systemic diseases. A significant reduction in haemoglobin level was noticed in impetigo, generalised demodicosis and flea bite hypersensitivitv RBC counts were significantly reduced in impetigo and folliculitis The total leukocyte count showed sienificant difference from thcit of control animals, in conditions such as folliculitis. German Shepherd Pvoderma. fuainculosis. localised demodicosis. ueneralised demodicosis. tlea bile hvpersensitivity. tlea bite dermatitis, tick infestation and callus pvoderma: suggesting primary or secondary bacterial infectionsennullThesis