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The physical map of Campylobacter jejuni TGH9011 (ATCC 43430) was constructed by mapping the three restriction enzyme sites SacII (CCGCGG), SalI (GTCGAC), and SmaI (CCCGGG) on the genome of C. jejuni by using pulsed-field gel electrophoresis and Southern hybridization. A total of 25 restriction enzyme sites were mapped onto the C. jejuni chromosome. The size of the genome was reevaluated and was shown to be 1,812.5 kb. Ten C. jejuni genetic markers that have been isolated in our laboratory were mapped to specific restriction enzyme fragments. Furthermore, we have accurately mapped one of the three rRNA operons (rrnA) and have demonstrated a separation of the 16S and 23S rRNA-encoding sequences in one of the rRNA operons.

The three rRNA gene loci of Campylobacter jejuni TGH9011 (ATCC 43431) were cloned. All three rRNA operons were shown to possess a contiguous 16S-23S structure and contain intercistronic tRNA(Ala) and tRNA(Ile). The three RNA operons and additional 14 genetic markers were mapped in the updated genomic map of C. jejuni TGH9011, which now has a total of 24 genetic markers.

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