Prevalence of drug resistance among HIV-1 treatment-naive patients in Greece during 2003–2015: Transmitted drug resistance is due to onward transmissions

Paraskeva, D.; Kostaki, Evangelia-Georgia; Magiorkinis, Gkikas; Gargalianos, Panagiotis; Xylomenos, G.; Magiorkinis, Emmanouil; Lazanas, Marios; Chini, M.; Nikolopoulos, Georgios K.; Skoutelis, A.; Papastamopoulos, V.; Antoniadou, Anastasia; Papadopoulos, A.; Psichogiou, M.; Daikos, Georgios L.; Oikonomopoulou, M.; Zavitsanou, A.; Chrysos, Georgios; Paparizos, V.; Kourkounti, S.; Sambatakou, H.; Sipsas, N. V.; Lada, M.; Panagopoulos, P.; Maltezos, E.; Drimis, S.; Hatzakis, A.

doi:10.1016/j.meegid.2017.07.003

Article

Date

2017

Author

Paraskeva, D.

Kostaki, Evangelia-Georgia

Magiorkinis, Gkikas

Gargalianos, Panagiotis
Xylomenos, G.

Magiorkinis, Emmanouil
Lazanas, Marios
Chini, M.

Nikolopoulos, Georgios K.
Skoutelis, A.
Papastamopoulos, V.

Antoniadou, Anastasia
Papadopoulos, A.

Psichogiou, M.
Daikos, Georgios L.
Oikonomopoulou, M.
Zavitsanou, A.
Chrysos, Georgios
Paparizos, V.
Kourkounti, S.
Sambatakou, H.
Sipsas, N. V.
Lada, M.
Panagopoulos, P.
Maltezos, E.
Drimis, S.
Hatzakis, A.

Source

Infection, Genetics and Evolution

Volume

Pages

183-191

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Keyword(s):

Hiv-1

Local transmission networks

Nnrtis

Onward transmissions

Phylogenetic analysis

Resistance

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Abstract

Background The prevalence of HIV-1 drug resistance among treatment-naïve patients ranges between 8.3% and 15% in Europe and North America. Previous studies showed that subtypes A and B were the most prevalent in the Greek HIV-1 epidemic. Our aim was to estimate the prevalence of resistance among drug naïve patients in Greece and to investigate the levels of transmission networking among those carrying resistant strains. Methods HIV-1 sequences were determined from 3428 drug naïve HIV-1 patients, in Greece sampled during 01/01/2003–30/6/2015. Transmission clusters were estimated by means of phylogenetic analysis including as references sequences from patients failing antiretroviral treatment in Greece and sequences sampled globally. Results The proportion of sequences with SDRMs was 5.98% (n = 205). The most prevalent SDRMs were found for NNRTIs (3.76%), followed by N(t)RTIs (2.28%) and PIs (1.02%). The resistance prevalence was 22.2% based on all mutations associated with resistance estimated using the HIVdb resistance interpretation algorithm. Resistance to NNRTIs was the most common (16.9%) followed by PIs (4.9%) and N(t)RTIs (2.8%). The most frequently observed NNRTI resistant mutations were E138A (7.7%), E138Q (4.0%), K103N (2.3%) and V179D (1.3%). The majority of subtype A sequences (89.7%; 245 out of 273) with the dominant NNRTI resistance mutations (E138A, K103N, E138Q, V179D) were found to belong to monophyletic clusters suggesting regional dispersal. For subtype B, 68.1% (139 out of 204) of resistant strains (E138A, K103N, E138Q V179D) belonged to clusters. For N(t)RTI-resistance, evidence for regional dispersal was found for 27.3% and 21.6% of subtype A and B sequences, respectively. Conclusions The TDR rate based on the prevalence of SDRM is lower than the average rate in Europe. However, the prevalence of NNRTI resistance estimated using the HIVdb approach, is high in Greece and it is mostly due to onward transmissions among drug-naïve patients. © 2017 Elsevier B.V.

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