title: Variants of Escherichia coli giving the appearance of mixed growths in urine.
abstract: Urines from patients with symptoms of urinary tract infection yielded mixed growths of different colony types of Escherichia coli. The different colony types were found to be variants of single infecting strains caused by mutation or by phase action. It is suggested that care should be exercised in the interpretation of apparently mixed growths from urine.
mesh_terms: D001435:Bacteriophages; D004926:Escherichia coli / Q000302:isolation & purification*; D005260:Female; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D009154:Mutation; D012703:Serotyping; D014552:Urinary Tract Infections / Q000382:microbiology*; D014556:Urine / Q000382:microbiology