A novel 61,578 bp genomic island named Proteus genomic island 2 (PGI2) was characterized in P. mirabilis of swine origin in China. The 23.85-kb backbone of PGI2 is related to that of Salmonella genomic island 1 and Acinetobacter genomic island 1. The MDR region of PGI2 is a complex class 1 integron containing fourteen different resistance genes. PGI2 was conjugally mobilized in trans to Escherichia coli in the presence of a conjugative IncC helper plasmid.
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