Sexually transmitted infection

Sexually transmitted infections (STI), also referred to as sexually transmitted diseases (STD) and venereal diseases (VD), are infections that are commonly spread by sex, especially vaginal intercourse, anal sex and oral sex. Most STIs initially do not cause symptoms. This results in a greater risk of passing the disease on to others. Symptoms and signs of disease may include vaginal discharge, penile discharge, ulcers on or around the genitals, and pelvic pain. STIs acquired before or during birth may result in poor outcomes for the baby. Some STIs may cause problems with the ability to get pregnant.

More than 30 different bacteria, viruses, and parasites can cause STIs. Bacterial STIs include chlamydia, gonorrhea, and syphilis among others. Viral STIs include genital herpes, HIV/AIDS, and genital warts among others. Parasitic STIs include trichomoniasis among others. While usually spread by sex, some STIs can also be spread by non-sexual contact with contaminated blood and tissues, breastfeeding, or during childbirth. STI diagnostic tests are easily available in the developed world, but this is often not the case in the developing world.

Star Trek: Deep Space Nine

Star Trek: Deep Space Nine (sometimes abbreviated to DS9) is a science fiction television series set in the Star Trek universe in the Milky Way galaxy, in the years 2369–2375. In contrast to the setting of the other Star Trek TV shows, it takes place on a space station instead of a starship, so as not to have two series with starships at the same time (the starship USS Defiant was introduced in season 3, but the station remained the primary setting for the show). This made continuing story arcs and the appearance of recurring characters much more feasible.

The show is noted for its well-developed characters, its original, complex plots, religious themes and for starring the only black captain in any of the televised incarnations of Star Trek (Paul Winfield had previously portrayed the ill-fated Captain Clark Terrell in the second Star Trek film). The series often showcased darker themes, less physical exploration of space, and (in later seasons) an emphasis on many aspects of war.

STD

STD may refer to:

Science and technology

People

Places

Other

See also