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HIV/AIDS Glossary

Resistance Testing

Synonym(s): Resistance Assay

Laboratory testing to identify which, if any, antiretroviral (ARV) drugs will not be effective against a person's specific strain of HIV. Resistance testing is done using a sample of blood. There are two types of resistance testing: genotypic and phenotypic. Resistance testing is used to guide selection of an HIV regimen when initiating or changing antiretroviral therapy (ART).

Related Term(s): Drug Resistance, Genotypic Antiretroviral Resistance Test, Phenotypic Antiretroviral Resistance Test

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