A rare infection at the University Hospital of North Staffordshire has caused the death of two infants who were born prematurely at 28 weeks.
They were being treated at the neonatal intensive care unit of the hospital.
Investigation revealed that five other children were found to be carrying the infection named Serratia marcescens.
Chief executive of the trust Julia Bridgewater said: "The trust identified an infection in our neonatal intensive care unit (NICU) in July, Serratia marcescens, that can affect babies born extremely premature. Sadly two babies who died, both born before 28 weeks, had this uncommon infection, and post-mortems confirmed Serratia marcescens as the cause of death. The families of the two babies were informed at the time of this infection."