Black Aqua

It was noted in one study that 10–40% of untreated women with N. gonorrhoea develop PID and 20–40% of women infected with C. trachomitis developed PID. Not all PID is caused solely by STIs; organisms that are considered normal vaginal flora can be involved, and individual cases of PID can be due to either a single organism or a vaginal infections of many different species. 10% of women in one study had asymptomatic Chlamydia trachomatis infection and 65% had asymptomatic infection with Neisseria gonorrhoeae.
Symptoms of PID vary from mild to severe. When PID is caused by chlamydial infection, a woman may be more likely to experience only mild symptoms even when serious damage is being done to her reproductive organs.