Due to the use of antibiotics in the treatment of infections for decades and the resistance of microorganisms, there is a tendency for sexually transmitted diseases to be asymptomatic and remain unrecognized by those affected. This trend hides two significant risks – of the spread of the disease, infection of the sexual partner and transmission in the family, and the development of complications, the effect of which is sometimes irreversible. Sexually transmitted diseases include, but are not limited to, venereal diseases. This group includes bacterial, viral, fungal infections and others that do not lead to the terrible consequences of venereal diseases. Venereal diseases Venereal diseases include syphilis, gonorrhea (triple), mild chancre, lymphogranuloma venereum and granuloma venereum. Venereal diseases that occur in our country are syphilis and gonorrhea. The rest are characteristic of exotic countries. Gonorrhea disease is often the cause of sterility, both in men and women. The complications of syphilis reflect on all organs in the body, the spinal cord and the brain. Syphilis in pregnant women poses serious risks to the life and health of the child. The disease is transmitted from the mother to the fetus during pregnancy. Chlamydia, mycoplasma and ureaplasma In recent decades, an increase in the incidence of such infections has been observed. A distinctive feature of these diseases is that in many cases they are asymptomatic. It is believed that people with reduced body defenses are prone to them. Usually, the causative agent of the infection is localized in the cells of the mucous membrane of the genitourinary organs. A healthy cell defends itself from microorganisms through phagocytosis – engulfment and intracellular digestion. Chlamydia, mycoplasma, ureaplasma, however, disrupt the process of phagocytosis of the body’s protective cells, which makes their reproduction possible. Although they are characteristic of the organs of the genitourinary system, these microorganisms can also enter and spread in the respiratory tract, eyes. Another feature of this type of infection is that female sex hormones and hormonal contraceptives create conditions for the growth of these microorganisms. The asymptomatic course of chlamydia, mycoplasma and ureaplasma infections is the cause of complications leading to infertility, complications of pregnancy and childbirth. In continuation: viral and other sexually transmitted infections