Common bacteria, yeast, parasites, and viruses which do not ordinarily cause serious diseases in people with healthy immune systems can cause fatal illnesses in people with AIDS. HIV has been found in saliva, tears, EGFR inhibitor nervous system tissue and spinal fluid, blood, semen (including pre-seminal fluid, which is the liquid that comes out before ejaculation), vaginal fluid, and breast milk. However, only blood, semen, vaginal secretions, and breast milk generally transmits infection to others (Schmidt, 2011). The virus can be spread (transmitted) by sexual contact (including

oral, vaginal, and anal sex), blood [via blood transfusions (now extremely rare in the U.S.) or needle sharing], exchange between mother and baby during pregnancy, childbirth, breastfeeding, or other exposures to one of the above bodily fluids; other methods of spreading the virus are rare and include accidental needle injury, artificial insemination with infected donated semen, and organ transplantation with infected organs. AIDS is not transmitted to a person who donates blood or organs. However, HIV can be transmitted to a person receiving

blood or organs from an infected donor. To reduce this risk, blood banks and organ donor programs screen donors, blood, and tissues thoroughly (Johnston et al., 2010; Firląg-Burkacka et al., 2009). Although treatments for AIDS and HIV can slow the course of the disease, there is no known cure or vaccine. Antiretroviral treatment reduces both the mortality and the morbidity GSK2126458 mw of HIV infection, but these drugs are expensive, and routine access to antiretroviral medication is not available in all countries (Guo and Li, 2011; Fomsgaard et al., 2011). Due to the difficulty in treating HIV infection, preventing infection is a key aim in controlling the AIDS pandemic, with health organizations promoting safe sex and needle-exchange programs in attempts to slow the spread of the virus. HIV

is transmitted through direct contact of a mucous membrane or the bloodstream with a bodily fluid containing HIV, such as blood, semen, vaginal fluid, preseminal fluid, and breast milk (Self, 2010). Acquired immunodeficiency syndrome begins with HIV infection. People infected with HIV may Olopatadine have no symptoms for 10 years or longer, but they can still transmit the infection to others during this symptom-free period. If the infection is not detected and treated, the immune system gradually weakens and AIDS develops. People with AIDS also have an increased risk of developing various cancers such as Kaposi’s sarcoma, cervical cancer, and cancers of the immune system known as lymphomas. In addition, people with AIDS often have systemic symptoms of infection like fevers, sweats (particularly at night), swollen glands, chills, weakness, and weight loss (Holmes et al., 2003).