FIG. 1.

PCR analysis of the genetic organization of the ErmB determinants and the Tn916-like elements. The primers used to analyze the ErmB determinants and the Tn916-like elements were described by Farrow et al. (8) and Wang et al. (25), respectively. The expected amplified fragments are shown as bars in relation to the arrangements of the elements from C. difficile 630 (GenBank accession no. AF109075), C. perfringens CP592 (GenBank accession no. U18931), and E. faecalis DS16 (GenBank accession no. U09422). The length of the fragments are reported in bp, and the primers used for each amplification are indicated below the bars.