What is the essence of sexually transmitted diseases? Are sexually transmitted diseases transmitted through blood

The definition of sexually transmitted diseases refers to diseases transmitted through sexual contact, known as sexually transmitted diseases. Common classic sexually transmitted diseases include: AIDS, syphilis, gonorrhea, chlamydia infection, HPV infection, Genital wart, etc. The essence of sexually transmitted diseases is infections that come into close contact with the reproductive organs. Sexual contact, close contact and friction with reproductive organs, fluid exchange, and small wounds on the skin and mucosa of reproductive organs. These wounds increase the chance of pathogen infection. Treponema pallidum, which causes AIDS, HIV and syphilis, is found in all body fluids of patients, including blood and semen. During sexual intercourse, viruses and helicoids enter the body through minor trauma and infect each other. Chlamydia and Neisseria gonorrhoeae mainly infect the columnar epithelium of reproductive organs, such as the columnar epithelium of male urethra, female urethra or cervical canal. During sexual intercourse, fluid exchange infection causes local suppuration. Male symptoms include redness and swelling of the glans, pyuria, frequent urination, painful urination, and hematuria. Women can manifest as purulent vaginal discharge, menstrual disorders, uterine tenderness, abdominal pain, fallopian tube abscess, pyuria, frequent urination, painful urination, and hematuria. If one side of the vulva or cervical epithelium is infected with HPV, this virus is epitheliophilic and only exists in Epithelium. HPV, sexual intercourse will infect each other, especially when Epithelium has slight trauma. HPV infection, high-risk HPV infection will lead to cervical cancer, vulva cancer, Anal cancer and Penile cancer HPV infection will lead to cervical cancer. Not all sexually transmitted diseases can be transmitted through blood at the same time AIDS and syphilis are sexually transmitted diseases, but also a blood borne disease. If the blood in the transfusion is not clean, it can lead to infection. Meanwhile, these two diseases can also be transmitted vertically from mother to child. The fetus is infected through the placenta during pregnancy, and the fetus comes into contact with the mother's blood during delivery. Neisseria gonorrhoeae, chlamydia and HPV are not blood borne diseases. Neisseria gonorrhoeae and chlamydia mainly cause local infection and abscess, rarely sepsis. Even if bacteria enter the bloodstream, due to severe symptoms, they will not donate blood during severe illness. HPV cannot enter the bloodstream at all. The principle of sexual transmission is close contact transmission, so using condoms as a physical barrier can prevent the spread of sexually transmitted diseases. Blood borne diseases may not be sexually transmitted. Hepatitis B and C are also blood borne diseases, but they are mainly transmitted through blood transfusions, shared syringes, dialysis, and can also be transmitted from mother to child, but rarely through sexual transmission.