Summary

Previous research from the Centers for Disease Control and Prevention (CDC) found that a dangerous variety of bacteria that cause drug-resistant infections, called NDM-producing carbapenem-resistant Enterobacterales (NDM-CRE), has become much more common in the United States, increasing by 461% from 2019–2023. Now, in a new study presented at ASM Microbe 2026 , researchers set out to better understand what was behind this sudden increase, examining if it was driven by closely related strains or, instead, by many different, unrelated bacteria.

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