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Genomic plot of multidrug-resistance plasmid p183660 (inner ring, blue) from a man in England infected with Shigella sonnei compared with pKSR100 (outer ring, purple), a multidrug-resistance plasmid from a case of S. flexneri 3a infection occurring among men who have sex in men (4). Drug-resistant elements from p183660 are shown in red. Plot produced by using BLAST Ring Image Generator (5).
