What are sexually transmitted diseases? STDs are mainly a group of infectious diseases caused by different pathogens through sexual or sex-like behaviors. Sexual behavior refers to not only heterosexual but also homosexual; not only vaginal intercourse in the traditional sense, but also oral or anal intercourse. Similar sexual behavior refers to oral-breast contact, finger (toe) lust, oral-earlobe contact, oral-anal contact, masturbation between same or opposite sexes, etc. Sexual or sex-like behavior does not cause disease per se; it is simply the means or vehicle through which various pathogens are transmitted between an infected sexual partner and an uninfected person. There are at least 30 pathogens that can be transmitted through sexual or sex-like behavior. However, they can also be transmitted through the bloodstream, mother-to-child route, the birth canal, indirect routes, and even the medical route, although they account for a lower proportion of the incidence. STD is not a disease, but a general term for a group of diseases. Guangdong Provincial Dermatology Hospital, Department of Dermatology Wu Tieqiang classification of venereal diseases? According to the type of pathogen is divided into 7 categories: viral infections such as genital herpes, genital warts, AIDS; chlamydial infections; bacterial infections such as gonorrhea, soft chancre, etc.; fungal infections such as Candida vaginitis, etc.; spirochete infections such as syphilis, etc.; protozoa and parasitic infections such as scabies, trichomoniasis urethritis, etc.; insect infections such as pubic lice disease, etc. Classification by treatment: curable STDs such as gonorrhea, syphilis, etc.; incurable STDs such as AIDS, genital herpes, etc. By disease surveillance: three STDs required to be reported by the Infectious Disease Control Law: gonorrhea, syphilis, AIDS and HIV infection; eight STDs required to be monitored by the Ministry of Health: gonorrhea, syphilis, soft chancre, chlamydia, lymphogranuloma venereum, genital warts, AIDS and HIV infection. By the possibility of sexual transmission: more than 95% of the cases are transmitted mainly by sexual means: gonorrhea, syphilis, soft chancre, chlamydia, and lymphogranuloma venereum. Also transmitted by other routes: genital warts (1/3 by contact), genital herpes, AIDS and HIV infection (by sharing syringe needles). Those transmitted mainly by indirect routes: scabies, hepatitis B, trichomoniasis, genital candidiasis, infectious molluscum contagiosum, etc. How do you classify safe sex? Safe sex acts: dry kissing (no intraoral contact), masturbation (masturbation), fondling and massage. Possibly safe sex: sex with a condom on. Unsafe sex: unprotected vaginal, oral, and anal intercourse, sharing sexual devices such as artificial sex devices and oscillators; sex with multiple partners. Who is susceptible to STDs? Sexually transmitted diseases (STDs) affect humans and are particularly prevalent in sexually active people. The susceptibility to STDs is not limited to prostitutes and clients, but rather, a person’s unsafe sexual practices can put that person at risk of being infected. It is important to note that a person who does not have unsafe sex (cleanliness) is also susceptible to STDs if his sexual partner has unsafe sex. What is the effect of sex, sexual intercourse, and number of intercourse on getting STDs? If there is no pathogenic infection between any of the sex partners, then the sex between the two will not get STD. If one partner has a pathogen infection, the other partner is at risk of being infected, but not necessarily infected. The risk of infection is also related to the following factors. The risk of anal sex is higher than vaginal sex; the risk of vaginal sex is higher than oral sex. A woman has an 80-90% chance of contracting an STD after one sexual encounter with an infected man, while a man in a similar situation has only a 20-25% chance of contracting the disease. After four sexual acts, the man’s chance of infection is estimated at 60-80%. Thus, male to female transmission is more likely than female to male transmission. The prevalence of HIV infection in circumcised men is 1.7-8.2 times higher than in circumcised men, and the infection rate is up to 8 times higher. Therefore, circumcised men are more likely to get an STD. What kind of tests are done for STDs? There is a simple questionnaire test where if you answer yes to 2 out of 3 questions, you should be tested for STDs. I do not wear a condom during sexual intercourse (vaginal, oral, anal). (A yes; B no) I have had more than one sexual partner (more than one). (A yes; B no) My sexual partner had other sexual partners. (A yes; B no)