title: Changing patterns of infectious diseases.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001424:Bacterial Infections / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D003141:Communicable Diseases / Q000453:epidemiology*; D004927:Escherichia coli Infections / Q000453:epidemiology; D006192:Haemophilus Infections / Q000453:epidemiology; D006193:Haemophilus influenzae; D006801:Humans; D007223:Infant; D007877:Legionnaires' Disease / Q000453:epidemiology; D008875:Middle Aged; D011159:Population Surveillance; D012480:Salmonella Infections / Q000453:epidemiology; D012486:Salmonella typhimurium