JAC Advance Access published online on January 28, 2004
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkh102
© 2004 by The British Society for Antimicrobial Chemotherapy
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Original article
1 PHLS Antiviral Susceptibility
Reference Unit, Birmingham;
* Corresponding author. E-mail: D.Pillay{at}ucl.ac.uk.
Received 20 May 2003
; revised 7 November 2003
; accepted 8 December 2003
Objectives: To establish a surveillance
programme for HIV drug resistance within the UK covering the years from
1998 to 2000, following the introduction of triple combination antiretroviral
therapy. Methods: Sentinel sites included large, medium
sized and small clinical centres. Data were analysed until December
2000. Results: Of nearly 300 samples tested, results
from 91, 92 and 92 patients, respectively in 1998, 1999 and 2000,
who were receiving HIV therapy with a viral load >2000
copies/mL, the majority had viruses with some degree of drug resistance.
Overall, the presence of any resistance increased
between 1998 and 1999, and fell again in 2000 (69% versus
88% versus 55%). However, major differences were
observed between drug classes, such that non-nucleoside analogue
reverse transcriptase inhibitor (NNRTI) resistance rose dramatically
over the period studied. We show that this correlated with increased
NNRTI prescribing. Furthermore, an overall increase in prevalence
of viruses with resistance to one or more drugs within all three
available classes was observed. A higher prevalence of drug resistance
was observed in patients from smaller clinical centres. Conclusions: This is the first such sentinel
surveillance dataset from the UK, and is unique in correlating these
data with national antiretroviral prescribing patterns. Our findings
are relevant to the increased transmission of HIV drug resistance
observed over this period.
Keywords: HIV-1, resistance, surveillance
Surveillance of HIV antiretroviral drug resistance
in treated individuals in England: 1998-2000
2 Statistics
Unit, Communicable Disease
Surveillance Centre, Colindale, London;
3 HIV Division, Communicable Disease
Surveillance Centre, Colindale, London;
4 Department of HIV and GUM, Chelsea and Westminster
Hospital, London;
5 University
Hospital NHS Trust Birmingham, Birmingham;
6 Department of Sexual Medicine, Birmingham Heartlands
Hospital, Birmingham, UK
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