title: The homogeneity of the faecal coliform flora of normal school-girls, characterized by serological and biochemical properties.
abstract: The homogeneity of fecal coliform flora in 52 schoolgirls was studied by serotyping and biotyping 10 randomly selected colonies in one fecal culture from each child. Ninety-eight clones were identified and of these 52 were dominant and 46 were minor strains. The probability of including at least one isolate of the dominant clone in a small random sample of colonies was calculated to be 86% for one colony, 94% for 2, 97% for 3, 99% for 4, and 99.3% for 5 randomly selected colonies.
mesh_terms: D000293:Adolescent; D001431:Bacteriological Techniques; D002648:Child; D004926:Escherichia coli / Q000145:classification* / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology*; D005260:Female; D006801:Humans; D010641:Phenotype; D012703:Serotyping