Search Menu

Glossary

Selected words and phrases

antiretrovirals – the common name for any HIV drugs. HIV is a retrovirus, so drugs to fight HIV are called antiretrovirals. Also abbreviated to ARVs.

sensitivity – when referring to the accuracy of a test result, sensitivity refers to the proportion of people with an illness or disease who have a positive test result.

If a test has low sensitivity, then false-negative results are the concern – where people have a condition but it is missed.

If a test has high sensitivity, then people are accurately diagnosed – and only a few people are missed.

For a serious condition, high sensitivity is essential to be able to identify people early.

Online calculator.

See specificity.

sensitivity – when referring to the activity of a drug, sensitive means that a drug still works. As resistance develops a drug becomes less sensitive.

A complete loss of sensitivity implies that a drug is no longer working.

It also means that your partner may benefit from counselling.

Atherosclerosis refers to a narrowing or hardening of large and medium sized arteries.

The narrowing is caused by a build-up of plaque, and usually takes many years.

As the walls of the artery thicken, the heart has to work harder to pump the same amount of blood through a narrower gap.

SVR (sustained virological response) – having a negative HCV viral load test 6 months after stopping HCV treatment. The response, 6 months after treatment is stopped, determines whether treatment has been effective in terms of clearing HCV. SVR is the most important result from an HCV treatment trial. See ETR.

lymphocyte – medical term for a white (clear) immune cell in blood, lymph or lymph tissue. Two main types of lymphocyte are B cells and T cells. CD4 cells and CD8 cells are both types of T cells. Sometimes a CD4 count is referred to as a CD4 T cell count or a T cell count.