CDC sounds alarm on STDs
Chlamydia continues surge; gonorrhea and syphilis change course

SURVEY SAYS New estimates of the rates of syphilis, gonorrhea and chlamydia infections (causal bacteria shown from left) are just a snapshot of a larger epidemic. In the U.S., there are more than 110 million people with a sexually transmitted disease at any point in time and about 20 million new infections every year.
Left and center: NIH Image Gallery/Flickr (CC BY-NC 2.0); Right: ZEISS Microscopy/Flickr (CC BY-NC-ND 2.0)