I presented data at the IUSTI congress in 2018 that we see much more gonorrhea and chlamydia in the throat and rectum than any other part of the body (for example the cervix in women or the urethra in men). This is probably due to the fact that it usually exists in the throat and rectum WITHOUT SYMPTOMS.
Chapman S et al. Detection of pharyngeal and rectal gonorrhea and chlamydia is more common than genital infections with Xpert® CTNG in a sexual health clinic. IUSTI world conference Dublin 2018 Poster presentation.