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PFGE profiles of 18 isolates of S. pneumoniae from day care center A. Lane 1, lambda ladder; lane 2, Spanish clone 23F; lane 3, serotype 6B (strain 8); lanes 4 to 6, serotype 19F (strains 10, 1, and 5); lane 7, serotype 23F (strain 17); lanes 8 to 20, serotype 23F (strains 13, 9, 11, 12, 14, 15, 16, 18, 2, 3, 4, 6, and 7).
