Infections caused by drug-resistant “nightmare bacteria” are rising rapidly in the United States, with cases increasing nearly 70 percent between 2019 and 2023, according to scientists at the US Centers for Disease Control and Prevention (CDC). The findings, published Monday in the Annals of Internal Medicine, warn of the growing threat from bacteria carrying the so-called NDM gene, which are resistant to many frontline treatments. Researchers analysed data from 29 US states that test and report cases of carbapenem-resistant bacteria. They counted 4,341 carbapenem-resistant infections in 2023, including 1,831 cases linked to bacteria carrying the NDM (New Delhi metallo-β-lactamase) gene. The rate of carbapenem-resistant infections rose from just under 2 per 100,000 people in 2019 to

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