Fecal pseudomonas aeruginosa as a cause of the blue diaper syndrome

Summary A 9-day-old infant presented with blue-green discoloration of the stools due to a pigment elaborated by Pseudomonas aeruginosa . The child had no evidence of systemic disease; however, as the stool is the major source of potential gram-negative pathogens, a course of oral antibiotic therapy was given to eradicate the organism and the stools returned to normal color.