Subacute infections of cartilaginous areas of the foot following puncture wounds in 11 children have persisted in spite of the administration of large doses of many different antibiotics. After an average of three weeks' delay, the failure of the treatment was explained by culture of Pseudomonas aeruginosa. Following appropriate surgical care, the infection has apparently been eliminated in all cases, but most of the children have significant residual skeletal damage. Prior reference to this condition has not been found in the medical literature.