Kluyvera cryocrescens sepsis in a preterm infant.

Kluyvera cryocrescens, formerly accepted as a benign saprophytic microorganism, is an opportunistic pathogen and its infection is very rare in humans. This report describes a preterm infant born at 30 weeks of gestational age and successfully treated for K. cryocrescens sepsis in the 3rd week of life. To our knowledge, this is the first case of K. cryocrescens sepsis in a newborn. The potential of K. cryocrescens as a serious pathogen should be recognized especially in patients such as preterm infants in whom the prognosis may be compromised without appropriate treatment.