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Healing of ulcerated foot pad of a senescent BALB/c mouse, but not that of a young BALB/c mouse, 12 weeks after infection with L. major. (A) Foot pad of a senescent mouse which had ulcerated after 7 weeks but started to heal 2 weeks later, leaving a scar and a dilated blood vessel in the central part. (B) Foot pad of a young mouse after 12 weeks of infection showing a large crusted ulcer.
