Glossary of HIV/AIDS-Related Terms - AIDSinfo - National Institutes ...

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Baseline
An initial measurement used as the basis for future comparison. For
people infected with HIV, baseline testing includes CD4 count, viral
load (HIV RNA), and resistance testing. Baseline test results are used
to guide HIV treatment choices and monitor effectiveness of
antiretroviral therapy (ART).
Basic Chemistry Profile
ALSO KNOWN AS: Comprehensive Metabolic Panel
Basophil
A type of white blood cell that helps the body fight infection by
triggering an inflammatory response to an antigen.
SEE RELATED TERM(S): Antigen, White Blood Cell
B-Cell Lymphoma
A type of lymphoma (cancer of the lymphatic system) that starts in the
B lymphocytes (B cells). People with weakened immune systems,
including people with HIV, are at a higher risk for B-cell lymphomas
than people with healthy immune systems. In people infected with HIV,
certain B-cell lymphomas are considered AIDS-defining conditions.
SEE RELATED TERM(S): AIDS-Defining Cancer, AIDS-Defining Condition, B
Lymphocyte, Lymphoma
Beta-2 Microglobulin (B2M)
A protein found on the surface of many cells, including white blood
cells. Beta-2 microglobulin (B2M) levels increase during infection with
some viruses, including HIV.
bid
ALSO KNOWN AS: BID
BID
ALSO KNOWN AS: bid, b.i.d.
An abbreviation meaning “two times a day.” The abbreviation is
commonly used in drug dosing instructions.
14 HIV/AIDS Glossary