Serratia marcescens bacteremia traced to an infused narcotic.

Background: From June 30, 1998, through March 21, 1999, several patients in the surgical intensive care unit of a hospital acquired Serratia marcescens bacteremia. We investigated this outbreak.

Methods: A case was defined as the occurrence of S.

Enterobacter hormaechei bloodstream infection at three neonatal intensive care units in Brazil.

Enterobacter hormaechei was defined as a unique species in 1989. We describe six case patients of E. hormaechei bloodstream infection in three neonatal intensive care units in Rio de Janeiro, Brazil.