Letter: Nosocomial infections.
D003428:Cross Infection / Q000209:etiology*; D004196:Disease Outbreaks; D004926:Escherichia coli / Q000302:isolation & purification; D005759:Gastroenteritis / Q000382:microbiology*; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000382:microbiology*; D012703:Serotyping