To the Editor.
—The report by Burry and Beezley,1 "Infant Mastitis Due to Gram-Negative Organisms," prompts this note concerning our experience with three similar patients. Two cases were due to Salmonella species and one to Escherichia coli.The first occurred in June 1965 in a 41/2-week-old black female infant. At 2 weeks of age she was seen by a physician because of loose stools without fever or vomiting. She improved without specific therapy and no stool culture was taken. Physiologic breast hypertrophy without evidence of infection was noted at that time. At 4 weeks of age, progressive swelling and redness of the left breast developed. Incision and drainage produced 15 ml of pus, culture of which revealed S newport. She was treated with ampicillin sodium and did well. The sickle-cell preparation was positive and hemoglobin electrophoresis showed a pattern of SFA with 75% fetal hemoglobin. The mother had a