Introduction
Sexually transmitted infections (STIs) are infections that are spread primarily through person-to-person sexual contact. There are more than 30 different sexually transmissible bacteria, viruses and parasites.
The most common conditions they cause are gonorrhoea, chlamydial infection, syphilis, trichomoniasis, chancroid, genital herpes, genital warts, human immunodeficiency virus (HIV) infection and hepatitis B infection.
Several, in particular HIV and syphilis, can also be transmitted from mother to child during pregnancy and childbirth, and through blood products and tissue transfer.
What is a sexually transmitted infection (STI)?
It is an infection passed from person to person through intimate sexual contact. STIs are also called sexually transmitted diseases, or STDs.
Major Sources of STI Transmissions
You can get an STI by having intimate sexual contact with someone who already has the infection. You can’t tell if a person is infected because many STIs have no symptoms. But STIs can still be passed from person to person even if there are no symptoms. STIs are spread during vaginal, anal, or oral sex or during genital touching. So it’s possible to get some STIs without having intercourse. Not all STIs are spread the same way.
Signs and Symptoms of STI
Many STIs have only mild or no symptoms at all. When symptoms do develop, they often are mistaken for something else, such as urinary tract infection or yeast infection. This is why screening for STIs is so important. The STIs listed here are among the most common or harmful to women.
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SS1 Biology Third Term: Sexually Transmitted Infections (STIs)
