M luteus produces larger and more inflamed lesions in lys M^−/− mice.

Each panel is a photograph of a lesion in an individual mouse on day 5. (A) C57Bl6 mice; (B) 129Sv mice; (C) lys M^−/− mice. M luteus bacterial suspension is bright yellow. Lesions in lys M^−/− mice show more inflammation, as evidenced by greater volume of white exudate, more redness, and numerous visible blood vessels. Each division on the scale represents 1 mm. (D) Areas of lesions in lys M^−/− mice (red circles) compared with controls F2 (blue triangles) and F1 (green squares) and parental strains C57Bl6 (black diamonds) and 129Sv (purple triangles).