Mycoplasma infection of the urinary and reproductive tracts is known as mycoplasma urinary tract infection. Mycoplasmas are a group of microorganisms that are between bacteria and viruses and are currently known to be the smallest microorganisms capable of independent living. In 1937, Drsnes et al. isolated mycoplasmas from a Bartholin's gland abscess, which was the first report of mycoplasmas causing disease in humans. There are as many as 7 species of mycoplasmas detected from the urinary and reproductive tracts, mainly including human mycoplasmas and ureaplasmas.
Mycoplasma urinary tract infection is most frequently isolated from the reproductive tract of a few infants (mainly female infants) with Mycoplasma UU accounting for the majority, most of which come from the mother, and rapidly decreases after 3 months. Before puberty, the male reproductive tract rarely harbors mycoplasmas, but 8%-22% of women carry mycoplasmas. After puberty, the presence of mycoplasmas in the reproductive tract is mainly the result of sexual contact. A survey shows that the isolation rate of UU from the lower reproductive tract of women who are sexually mature and asymptomatic is 56.8%. The detection rate of mycoplasmas is related to factors such as youth, multiple sexual partners, black race, and non-barrier contraception, with the isolation rate of mycoplasmas in normal males approximately 14%.