title: The changing pattern of hospital-acquired infections: increase of infections by Gram-negative bacteria.
mesh_terms: D003428:Cross Infection / Q000382:microbiology*; D004756:Enterobacteriaceae Infections / Q000453:epidemiology*; D004927:Escherichia coli Infections / Q000453:epidemiology; D006801:Humans; D007710:Klebsiella Infections / Q000453:epidemiology; D009426:Netherlands; D011552:Pseudomonas Infections / Q000453:epidemiology; D012480:Salmonella Infections / Q000453:epidemiology; D013203:Staphylococcal Infections / Q000453:epidemiology