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FIG. 3.

FIG. 3

Ribotyping and RAPD patterns of five C. diphtheriae strains isolated in 1996 and four C. diphtheriae strains isolated from 1973 to 1983. Lane 1, PR101 (biotype mitis, nontoxigenic; isolated in 1996); lane 2, PR130 (biotype mitis, nontoxigenic; isolated in 1996); lane 3, PR20 (biotype mitis, nontoxigenic; isolated in 1996); lane 4, F1803 (biotype mitis, nontoxigenic; isolated in 1981); lane 5, F2726 (biotype mitis, nontoxigenic; isolated in 1982); lane 6, F4306 (biotype mitis, nontoxigenic; isolated in 1983); lane 7, PR110 (biotype mitis, toxigenic; isolated in 1996); lane 8, PR115 (biotype mitis, toxigenic; isolated in 1996); and lane 9, C5276 (biotype mitis, toxigenic; isolated in 1973).