Surveillance cultures on neonatal intensive care units.
D003428:Cross Infection / Q000382:microbiology*; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology*; D006801:Humans; D007231:Infant, Newborn; D017053:Infection Control / Q000379:methods*; D007363:Intensive Care Units, Neonatal; D011237:Predictive Value of Tests; D012007:Rectum / Q000382:microbiology*