We report an outbreak of Serratia marcescens infection in the neonatal inte
nsive care unit of a community hospital. The outbreak involved eight neonat
es, (five infected and three colonized), one of whom died. Pulsed-field gel
electrophoresis confirmed that all isolates were identical strains. Cohort
ing and isolation of the infected neonates helped to control the outbreak.
No environmental source of infection was found (Infect Control Hosp Epidemi
ol 2001;22:303-305).