Species of Corynebacterium non-C. bovis are infrequently isolated from cases of subclinical mastitis in dairy cattle.
Corynebacterium non-C. bovis did not change milk yield and composition when evaluated at the contralateral quarter level.
C. bovis was most frequently isolated from the milk of cows with subclinical mastitis caused by Corynebacterium spp.
C. bovis increased SCC and decreased lactose and milk solids non-fat content when evaluated at the contralateral quarter level.