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Q

qd

Also known as: QD

QD Audio (En español)

Also known as: q.d., qd

An abbreviation meaning “once a day.” The abbreviation is commonly used in drug dosing instructions.

q.d.

Also known as: QD

QID Audio (En español)

Also known as: q.i.d., qid

An abbreviation meaning “four times a day.” The abbreviation is commonly used in drug dosing instructions.

qid

Also known as: QID

q.i.d.

Also known as: QID

Qualitative Transcription-Mediated Amplification Audio (En español)

A type of viral load test. Viral load tests are used to diagnose acute HIV infection, guide treatment choices, and monitor response to antiretroviral therapy (ART).

See Related Term(s): Viral Load Test

Quantitative Branched DNA (bDNA ) Audio (En español)

A type of viral load test. Viral load tests are used to diagnose acute HIV infection, guide treatment choices, and monitor response to antiretroviral therapy (ART).

See Related Term(s): Viral Load Test

Quasispecies Audio (En español)

A group of viruses found in the same host. The viruses in the group develop similar genetic mutations over time. During HIV infection, HIV can mutate into multiple quasispecies, which may reduce the immune system’s ability to control HIV infection. Antiretroviral therapy (ART) started in the early stages of HIV infection can control HIV replication and development of quasispecies.

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