Abstract

Nuol Aywel Madut , Atif Elamin Abdel Gadir, Isam Mohamed El Jalii

Out of 2283 quarter milk samples, 224 (9.81%) gave positive reactivity to California mastitis test, while 600 (26.28%) and 1459 (63.9%) recorded as doubtful and negative respectively. In this study isolated Corynebacterium were Corynebacterium striatum 9 (33.3%), Arcanobacterium pyogene 4 (14.8%), Corynebacterium Pseudotuberculosis 2 (7.4%), Corynebacterium ulcerans 5 (18.5%), Corynebacterium bovis 7 (25.9%). The result showed that age, stage of lactation, teat lesion could be a risk factors for presence of bovine mastitis (OR = 1.34, 1.59 and 7.31 respectively).