Drug-resistance surveillance among newly HIV-1 diagnosed individuals in Buenos Aires, Argentina
- 1 June 2007
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in AIDS
- Vol. 21 (10), 1355-1360
- https://doi.org/10.1097/qad.0b013e3280b07db1
Abstract
Objective: Our objective was to estimate primary resistance in an urban setting in a developing country with a long history of antiretroviral delivery and high coverage levels. Design: We carried out a resistance surveillance study according to WHO HIV-Resistance Guidelines. Methods: Blood samples were collected from 323 drug-naive HIV-1 infected individuals diagnosed at two HIV voluntary counselling and testing centers in Buenos Aires. Viral-load, CD4 cell counts and detuned assays were performed on all samples. The pol gene was sequenced and the resistance profile determined. Phylogenetic analysis was performed by neighbor-joining trees and bootscanning analysis. Results: We found that 12 (4.2%) of the 284 samples sequenced harbored primary resistance mutations, of which K103N, M41L and V108I were most prevalent. Phylogenetic analysis revealed evidence for the transmission of the K103N mutation among the drug-naive population. The proportion of recent infections identified by the detuned assay was 10.1%. Conclusions: Levels of primary resistance in Buenos Aires are still low, despite a long history of ARV delivery and high coverage levels.Keywords
This publication has 19 references indexed in Scilit:
- Update on Primary HIV-1 Resistance in ArgentinaJAIDS Journal of Acquired Immune Deficiency Syndromes, 2006
- The impact of transmitted drug resistance on the natural history of HIV infection and response to first-line therapyAIDS, 2006
- Time trends in primary resistance to HIV drugs in the United Kingdom: multicentre observational studyBMJ, 2005
- Should Resistance Testing Be Performed for Treatment-Naive HIV-Infected Patients? A Cost-Effectiveness AnalysisClinical Infectious Diseases, 2005
- Resistance to Nonnucleoside Reverse-Transcriptase Inhibitors and Prevalence of HIV Type 1 Non-B Subtypes Are Increasing among Persons with Recent Infection in SpainClinical Infectious Diseases, 2005
- Prevalence of Drug‐Resistant HIV‐1 Variants in Untreated Individuals in Europe: Implications for Clinical ManagementThe Journal of Infectious Diseases, 2005
- Drug Resistance Testing Provides Evidence of the Globalization of HIV Type 1: A New Circulating Recombinant FormAIDS Research and Human Retroviruses, 2004
- The Epidemiology of Antiretroviral Drug Resistance among Drug‐Naive HIV‐1–Infected Persons in 10 US CitiesThe Journal of Infectious Diseases, 2004
- Antiretroviral Drug Resistance Testing in Adults Infected with Human Immunodeficiency Virus Type 1: 2003 Recommendations of an International AIDS Society–USA PanelClinical Infectious Diseases, 2003
- Persistence and Fitness of Multidrug-Resistant Human Immunodeficiency Virus Type 1 Acquired in Primary InfectionJournal of Virology, 2002