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An international collaborative study on the detection of an HIV-1 genotype B field isolate by nucleic acid amplification techniques.


J Virol Methods. 1999 Mar;78(1-2):21-34. Unique Identifier : AIDSLINE

An international collaborative study to assess inter-laboratory variation in the sensitivity of gene amplification assays for the detection of HIV-1 RNA sequences was conducted using a panel of eight duplicate dilutions of an HIV-1 genotype B clinical isolate and negative control samples. Twenty-five laboratories participated in the study and used a variety of in-house assays and commercial assay systems. With few exceptions, the assays were more sensitive than a p24 antigen assay. Overall, the PCR-based Amplicor Monitor assay was the most sensitive and gave the highest mean copy number for any one sample. Some of the in-house assays gave results comparable with the Monitor assay whilst the NASBA and bDNA assays appeared to be less sensitive. As a result of this study, an HIV-1 Working Reagent for the standardisation of nucleic acid amplification assays was developed and assessed in a subsequent study. Similar differences in sensitivity between the different assay systems was observed. The discrepancies in viral copy number obtained using the Working Reagent highlights the need for an International Standard against which all Working Reagents may be calibrated.

JOURNAL ARTICLE Adult DNA, Complementary DNA, Viral/ANALYSIS Gene Amplification/*METHODS Human HIV Core Protein p24/ANALYSIS HIV Infections/*VIROLOGY HIV-1/GENETICS/*ISOLATION & PURIF International Cooperation Laboratories/*STANDARDS Male Polymerase Chain Reaction/*STANDARDS Reproducibility of Results RNA, Viral/*ANALYSIS/GENETICS Sensitivity and Specificity Support, Non-U.S. Gov't


Information in this article was accurate in October 30, 1999. The state of the art may have changed since the publication date. This material is designed to support, not replace, the relationship that exists between you and your doctor. Always discuss treatment options with a doctor who specializes in treating HIV.