Three babies at Norfolk and Norwich University Hospital have been put on antibiotics after Pseudomonas was found to have colonised their skin. All babies in the unit were tested after \"higher than normal\" levels of the bacteria were found in the water system. None has been found to have developed clinical signs of infection. In Northern Ireland, four babies have died since December after developing Pseudomonas infections. The first died that month after contracting the bug at the Altnagelvin Hospital in Londonderry, while the other three died in January after catching a different strain at the Royal Jubillee Maternity Hospital in Belfast. Dr David Booth, a consultant in the Norwich unit, said: \"The safety of the babies in our care and supporting their parents and families are our priorities.