What is the most common bacterial STD in the US?

Chlamydia is the most common bacterial sexually transmitted disease (STD) in the United States. The Centers for Disease Control and Prevention (CDC) reports that chlamydia continues to be one of the most frequently diagnosed infections, particularly among young adults and adolescents. The high prevalence of chlamydia can be attributed to several factors: it often presents asymptomatically, meaning many individuals do not realize they are infected, which facilitates its spread. Routine screening in sexually active populations further highlights the importance of chlamydia as a major public health concern.

In contrast, while gonorrhea and syphilis are also significant bacterial STDs, their incidence rates are lower compared to chlamydia. Trichomoniasis, although a common STD, is caused by a parasite rather than a bacterium, categorizing it differently. Thus, the distinctive characteristics and prevalence of chlamydia make it the standout infection among bacterial STDs in the United States.