More news is emerging about the dire new antibiotic resistance factor announced last month: MCR-1, a gene that disables the action of colistin, a very last-resort drug in human medicine. (If you’re just coming to this, my past posts are here and here.) Quick recap: A gene conferring resistance to colistin was found in pigs, retail meat, and human patients in China; then it was spotted in Malaysia; then in Portugal. Then, in the next major development, researchers in Denmark announced they had identified the gene in one human patient and five samples of imported meat.
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