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Acinetobacterursingii is an aerobic,gram-negative, opportunistic microorganism which is rarely isolated among Acinetobacterspecies. We present two immunocompetent infants who developed bacteremia due to A.ursingii. The first patient is a two -month- old boy who had been hospitalized in pediatric surgery unit for suspected tracheo-esophageal fistula because of recurrent aspiration pneumonia unresponsive to antibiotic therapy. The second patient is a fourteen -month- old boy with prolonged vomiting and diarrhea. A. ursingii was isolated from their blood cultures. They were successfully treated with ampicillin-sulbactam.Although A.ursingii hasrecently been isolated from a clinical specimen; reports of infection with A.ursingii in children are rare. A.ursingii should be kept in mind as an opportunistic microorganism in children.