US Syphilis Cases Rise in 2022; Most in 70 Years

FILE - This 1966 microscope photo made available by the Centers for Disease Control and Prevention shows a tissue sample with numerous, corkscrew-shaped, darkly-stained Treponema pallidum spirochetes, the bacterium responsible for causing syphilis.

The U.S. syphilis epidemic isn't abating, with the rate of infectious cases rising 9% in 2022, according to a new federal government report on sexually transmitted diseases in adults.