**6.** *Chlamydia trachomatis*

**Clinic:** *Chlamydia trachomatis* causes trachoma, adult inclusion conjunctivitis, neonatal conjunctivitis, infant pneumonia, LGV, and urogenital infections. Infections in newborns are directly related to sexually transmitted infections [4].

It is the most common cause of nongonococcal urethritis (NGU) in the sexually active and young population [13]. Although its distribution varies according to region, its prevalence is 20–50% [14]. *Chlamydia trachomatis* is an exclusively sexually transmitted pathogen and has been more isolated in developing countries. Clinically, it usually causes cervicitis in women, and epididymitis and infertility in men. It should be noted that it can be asymptomatic in both men and women. Azithromycin should be considered in the treatment [15].
