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Birmingham scientists have identified an essential genetic code for a method called plasmid curing, which aims to “displace” antibiotic-resistance genes from bacteria.

Plasmids, which are small, circular strands of DNA, play a crucial role in allowing to share beneficial genes rapidly in a changing environment, most concerningly when they carry genes conferring resistance to antibiotics.

Professor Chris Thomas from Birmingham’s School of Biosciences has investigated plasmid curing for many years, and engineered useful “multi-copy” (many copies in each bacterium) plasmids for this purpose, resulting in a patented, efficient way to displace unwanted plasmids that carry resistance.

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