Sexually transmitted diseases, often known as Sexually Transmitted Infections (STIs). STDs are illnesses that are transmitted from one person to another by sexual activity, such as anal, vaginal, or oral sex. Parasites, viruses, and bacteria are all responsible for STDs.
AIDS (Acquired Immune Deficiency Syndrome) is caused by the HIV virus. Having vaginal, anal, or oral intercourse with someone who has HIV without using a condom spreads HIV. If you exchange drug "works" (such as needles and syringes) with someone who has HIV, you can develop HIV. HIV weakens the body's immune system by attacking it. When a person's immune system becomes too weak to combat illnesses, he or she develops AIDS. There are medications that can help patients with HIV, but no cure for HIV or AIDS exists.
Multiple pathogen species infect a host at the same time, resulting in HIV and STDs . There are a variety of co-infections that are linked to STDs, including HIV, which can lead to death or aggravate the individual's health. Because these pathogen species can interact within the host, co-infection is of particular importance to human health. The net effect of co-infection on human health is assumed to be unfavorable; however interactions with other parasites might have either good or negative consequences.
Other examples of STDs: