The CP8-IsdB antiserum significantly reduced the CFU/abscess formed by CP8 strain PS80 (P = 0.04) (Fig. 5c), as well as those formed by S. aureus strains Newman (CP5) or LAC (CP−) (P = 0.0148 and P = 0.0019, respectively) (Fig. 5c). This evidence concerns the gene LCT and abscess.