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Case 2: Features of Genotypic and Phenotypic Resistance Assays

You answered:

A Compared with the phenotypic assay, the genotypic assay is more expensive and has a longer turnaround time.

This answer is incorrect. The genotype assay is less expensive than the phenotype and generally has a more rapid turnaround time.

Choose another answer:

B The M184V mutation notation refers to the replacement of the amino acid methionine (M) by valine (V) at amino acid position 184.
C The genotypic assay detects resistance in greater than 98% of minority populations of HIV that exist within an individual.
D When a patient is undergoing a change in antiretroviral therapy because of virologic failure, genotypic resistance testing does not provide any benefit in improving virologic responses.

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