title: Present epidemiological character of opportunist gram-negative bacteria infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001419:Bacteria; D001424:Bacterial Infections / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D003428:Cross Infection / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D012383:Romania