FIG. 1.

Dendrogram depicting genetic distance and overall relatedness of pneumococcal isolates on the basis of rrn RFLP data. a, isolates for which cefotaxime MICs were ≥4 μg/ml. See Table 1 for the other characteristics of the isolates. (b, c, d, e, and f are representative of the serotype 9V/14 penicillin-resistant French clone, the serotype 6B penicillin-resistant Spanish clone, the serotype 6B penicillin-resistant French clone, the French derivatives of the pandemic 23F multiresistant Spanish clone, and the pandemic serotype 23F multiresistant Spanish clone, respectively.)