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RESEARCH ARTICLE

An observational study of antiretroviral drug resistance in treatment-naïve patients with HIV infection in New Zealand, from 2007 to 2011

Mark Hobbs A D , Jinyang Shi B , Michael Maze C and Simon Briggs C
+ Author Affiliations
- Author Affiliations

A Department of Medicine, Middlemore Hospital, Private Bag 93311, Otahuhu, Auckland 1640, New Zealand.

B Virology Laboratory, LabPLUS, Auckland City Hospital, Private Bag 92024, Auckland Mail Centre, Auckland 1142, New Zealand.

C Infectious Disease Unit, Auckland City Hospital, Private Bag 92024, Auckland Mail Centre, Auckland 1142, New Zealand.

D Corresponding author. Email: mrhobbsie@hotmail.com

Sexual Health 12(6) 556-559 https://doi.org/10.1071/SH14226
Submitted: 26 November 2014  Accepted: 7 July 2015   Published: 17 August 2015

Abstract

Background: Genotypic testing for antiretroviral drug resistance is recommended for all patients newly diagnosed with HIV infection. This study sought to quantify the prevalence of antiretroviral drug resistance in treatment-naïve patients with HIV infection in New Zealand. Methods: All genotypic antiretroviral drug resistance testing in New Zealand is performed at LabPLUS, Auckland City Hospital. The clinicians who requested antiretroviral drug resistance testing during the period 2007–2011 were contacted and were asked to identify which patients with HIV infection were treatment-naïve at the time of testing. Results of the antiretroviral drug resistance tests for treatment-naïve patients with HIV infection were reviewed and the prevalence of resistance determined. Results: Two hundred and 10 treatment-naïve patients with HIV infection who had antiretroviral drug resistance testing performed were included; 20 (10%) were found to have a significant resistance mutation. Nine patients had virus resistant to one or more nucleoside reverse transcriptase inhibitors, 13 to non-nucleoside reverse transcriptase inhibitors and one to protease inhibitors. Conclusions: The prevalence of antiretroviral drug resistance in treatment-naïve patients with HIV infection identified in this study is comparable to rates identified in studies from North America, the UK and Europe. This prevalence demonstrates the need for antiretroviral drug resistance testing for all treatment-naïve patients with HIV infection in New Zealand.

Additional keywords: antiretroviral drugs, antiretroviral resistance mutations, HIV resistance testing, transmitted HIV drug resistance.


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