Last year, more than 2 million cases of chlamydia, gonorrhea, and syphilis were reported in the United States, CDC said Tuesday. Approximately 1.6 million of the new diagnoses were cases of chlamydia, according to CDC's annual report on STDs. In addition, there were 470,000 cases of gonorrhea and nearly 28,000 cases of primary and secondary syphilis. "Increases in STDs are a clear warning of a growing threat," noted Jonathan Mermin, MD, MPH, director of CDC's National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. "STDs are a persistent enemy, growing in number, and outpacing our ability to respond." The report found that rates of syphilis increased by nearly 18% from 2015 to 2016. Most of the cases were among MSM, but there was also a 36% increase in syphilis among women and a 28% increase in congenital syphilis during this period. Rates of gonorrhea increased for both men and women last year. However, the sharpest increase was seen among men, at 22%. To help stem the spread of these diseases, CDC said that renewed commitment is needed from all players. State and local health departments should refocus their efforts on STD investigation and clinical service infrastructure for rapid detection and treatment for people living in areas hardest hit by the STD epidemic. In addition, providers should make STD screening and timely treatment a standard part of medical care.