In the groups of the strains isolated from furuncles and the secondary infected dermatitis, no isolate carries genes encoding Fib, Cna, FnBb, Bbp. The presence of ClfB seemed to be linked to the presence of Lbp, since all the strains carrying clfB also carried lbp. Ebp is produced by 48% of the isolates from furuncles, while it is produced by 30% in the case of non-infected dermatitis. This evidence concerns the gene LBP and dermatitis.