Magnitude and risk factors associated with bovine dermatophilosis in Sabon-Gari, Kaduna state and Jos, Plateau state, Nigeria

Abstract

Dermatophilosis is a contagious zoonotic skin disease affecting a variety of domestic and wild animals with grave economic consequences.  The status of bovine dermatophilosis and associated risk factors in Sabon-Gari, Kaduna State and Jos, Plateau State, Nigeria are yet to be fully determined. The aim of this study was to determine the prevalence of bovine dermatophilosis in Sabon-Gari and Jos. One thousand, nine hundred and twenty skin scab samples consisting of 1,530 from Sabon-Gari and 390 from Jos were obtained from cattle having cutaneous lesions including papules, exudative dermatitis with matting of the hair, cream colored, thickly crusted and scabby lesions suggestive of Dermatophilus infection. Smears were made from the underneath surface of each specimen on a clean glass slide,  air dried, heat fixed and Gram stained. The stained smears were examined microscopically for Gram-positive filamentous organism having both longitudinal and transverse division, typical of Dermatophilus congolensis. Further identification was done by isolating the causative agent in 5% de-fibrinated sheep blood agar. Data were analyzed using tables, percentages and Chi square test. P-values less than or equal  to 0.05 were considered significant. One hundred and forty-six (9.5 %) and 21 (5.4%) of the samples from Sabon-Gari and Jos respectively were positive for D. congolensis. The overall prevalence of bovine dermatophilosis in Sabon-Gari and Jos was 8.7% (167/1,920),  respectively. Breed, age, management practice and season were found to be significant risk factors associated with bovine  dermatophilosis. Methods for control of the disease in cattle as well as prevention of human exposure were highlighted.

Keywords: Cattle, Dermatophilosis, Jos, Nigeria, Sabon-Gari