Abstract
Dermatophilosis is one of the major economically important diseases of cattle in Nigeria. Managing the condition has been very challenging and re-occourrence has been occuring with moderate to high morbility and mortality.The incidence and biochemical features of cattle with dermatophilosis was conducted in June to December 2016 across the four geopolitical zones of Oyo state, Nigeria. Clinical diagnosis were made based on appearance of dermatophilosis lesion, breeds morphologically characterized,ageing were based on rostral dentition and severity based on the extent and nature of the lesion. Biochemical analysis was based on standard procedure as prescribed by Fortress International. 50 cattle were found to be infected with clinical dermatophilosis during the period of the study . 24 (48%) in Ibadan zone,Oyo/ogbomosho 14(28%),Oke-ogun 08(16%) and Ibarapa zone with04( 8%). Breeds distribution across the zones showed 28 (56%) White Fulani, 5 (10%) Sokoto Gudali, 3 (6%) Adamawa Gudali, 7 (14%) Red Bororo, 5 (10%) Cross breeds while the Kuri was 2(4%). Less than 2 years old were (4%) 2 animals while the adults were (96%) 48 animals and they fall under the categories of 2 -2.5years of age, 3-3.5 years of age and those which are over 3 years of age. The different levels of severity were categorized into mild 20 (40%) , moderate 23(46%) and severe7 (14%) .The best parameters were seen in White Fulani, while the least were seen in Adamawa Gudali. The age group in the category of 3 - 31/2 years had most of the best serum values while the least values were seen in animals less than 2 years of age.
Cattle exhibiting mild lesions had most of the best serum values and the least values were observed in cattle with severe lesions. No significant difference (p > 0.05) was observed in the mean values for the various parameters studied among the breeds, age, and severity of condition when analyzed using the one way analysis of variance and Student’s t-test. Significance was accepted at p < 0.05 .

Key words: Incidence, Biochemical parameters, Cattle, Dermatophilosis, Oyo state.