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Alignment of the sequences of the 23S rRNA gene associated with erythromycin resistance. The sequences correspond to the partial nucleotide sequences of the 508-bp PCR products from 17 selected Campylobacter sp. strains and C. jejuni reference strain NCTC 11168 (GenBank accession numbers AL139074, AL139075, and AL139076). The strain numbers and the MICs of erythromycin are indicated. M, position of a point mutation associated with resistance to erythromycin; *, spontaneous mutation.
