Near-Universal Resistance to Macrolides of Treponema pallidum in North America

Of 604 Treponema pallidum (syphilis) strains sampled from 13 U.S. states, Washington, D.C., and two Canadian provinces from 2017 through 2023, a total of 599 (99.2%) had genotypic resistance to azithromycin.

​   The New England Journal of Medicine: Search Results in Infectious Disease