title: Letter: Serotyping of E. coli.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D004751:Enteritis / Q000382:microbiology; D004926:Escherichia coli / Q000145:classification*; D006801:Humans; D007223:Infant; D012703:Serotyping; D014329:Tropical Climate