Glossary of AIDS and HIV-related Terms (2/3)
- High-risk behaviour
- A term used to describe activities that increase a person’s risk of transmitting or becoming infected with HIV. Examples of high-risk behaviours include: unprotected vaginal or anal intercourse (without a condom) or using contaminated injection needles or syringes.
- HAART
(Highly active antiretroviral therapy) - The name given to treatment regimens to aggressively suppress viral replication and progress of HIV disease. The usual HAART regimen combines three or more different drugs such as two nucleoside reverse transcriptase inhibitors and a protease inhibitor, two nucleoside reverse transcriptase inhibitors and a non-nucleoside reverse transcriptase inhibitor, or other combinations.
- HIV
(Human Immunodeficiency Virus) - The standard name was officially chosen in August 1986 to avoid confusion after
different countries gave the virus other names. In old literature one may see the
virus referred to as: HTLV-III, LAV or ARV.
HIV-1: The retrovirus that is the principal worldwide cause of AIDS.
HIV-2: A retrovirus closely related to HIV-1 that also causes AIDS in humans, found principally in West Africa. - HIV incidence
- The proportion of people who have become infected with HIV during a specific period of time.
- HIV medications HIV medications fall under 4 classes:
- HIV-negative
- Showing no evidence of infection with HIV. Synonymous with seronegative.
- HIV-positive
- Showing indications of infection with HIV (e.g., presence of antibodies against HIV) on a test of blood or tissue. Synonymous with seropositive.
- HIV prevalence
- Usually given as a percentage, HIV prevalence quantifies the proportion of individuals in a population who have HIV at a specific point in time. The terms prevalence and incidence should not be confused. Incidence only applies to the number of new cases, while the term prevalence applies to all cases, old and new.
- Incubation period
- The time interval between HIV infection and the onset of AIDS-defining illnesses.
- Kaposi’s Sarcoma (KS)
- Many people with AIDS experience this cancer of the connective tissues in blood vessels. Pink, broken or purple blotches on the skin may be a symptom of KS. KS lesions sometimes occur inside the body in lymph nodes, the intestinal tract and the lungs.
- Opportunistic infections (OIs)
- Infections caused by organisms that do not normally cause disease in people whose immune systems are intact. Some of the most common opportunistic infections indicating that someone has AIDS are: PCP (pneumocystic carinii pneumonia), oesophageal candidiasis and toxoplasmosis.
- Pandemic
- A disease prevalent throughout an entire country, continent or the whole world.
- PEP
(Post-exposure prophylaxis) - An emergency medical response used to protect individuals exposed to HIV. PEP consists of HIV antiretroviral medication, laboratory tests and counselling. Ideally, PEP should be initiated within 2 to 24 hours (and no later than 48 to 72 hours) of possible exposure to HIV and must continue for approximately four weeks.
- Retrovirus
- A type of virus that is able to insert its genetic material into a host cell’s DNA. HIV is a retrovirus.
• protease inhibitors,
• non-nucleoside reverse transcriptase inhibitors,
• nucleoside/nucleotide analogue reverse transcriptase inhibitors and
• entry inhibitors (only one medication currently available under this class: Fuzeon).