Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men
<p>Abstract</p> <p>Background</p> <p>Because various HIV vaccination studies are in progress, it is important to understand how often inter- and intra-subtype co/superinfection occurs in different HIV-infected high-risk groups. This knowledge would aid in the developmen...
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doaj-23a3ec95bcad466e8d3aa315f531740b2020-11-24T22:15:22ZengBMCVirology Journal1743-422X2012-09-019122310.1186/1743-422X-9-223Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with menSoares de Oliveira AnaPessôa de Farias Rodrigoda Costa AntonioSauer MarianaBassichetto KatiaOliveira Solange MariaCosta PriscillaTomiyama ClaudiaTomiyama Helena TomokoSabino EsterKallas EsperSanabani Sabri<p>Abstract</p> <p>Background</p> <p>Because various HIV vaccination studies are in progress, it is important to understand how often inter- and intra-subtype co/superinfection occurs in different HIV-infected high-risk groups. This knowledge would aid in the development of future prevention programs. In this cross-sectional study, we report the frequency of subtype B and F1 co-infection in a clinical group of 41 recently HIV-1 infected men who have sex with men (MSM) in São Paulo, Brazil.</p> <p>Methodology</p> <p>Proviral HIV-1 DNA was isolated from subject's peripheral blood polymorphonuclear leukocytes that were obtained at the time of enrollment. Each subject was known to be infected with a subtype B virus as determined in a previous study. A small fragment of the <it>integrase</it> gene (nucleotide 4255–4478 of HXB2) was amplified by nested polymerase chain reaction (PCR) using subclade F1 specific primers. The PCR results were further confirmed by phylogenetic analysis. Viral load (VL) data were extrapolated from the medical records of each patient.</p> <p>Results</p> <p>For the 41 samples from MSM who were recently infected with subtype B virus, it was possible to detect subclade F1 proviral DNA in five patients, which represents a co-infection rate of 12.2%. In subjects with dual infection, the median VL was 5.3 × 10<sup>4</sup> copies/ML, whereas in MSM that were infected with only subtype B virus the median VL was 3.8 × 10<sup>4</sup> copies/ML (p > 0.8).</p> <p>Conclusions</p> <p>This study indicated that subtype B and F1 co-infection occurs frequently within the HIV-positive MSM population as suggested by large number of BF1 recombinant viruses reported in Brazil. This finding will help us track the epidemic and provide support for the development of immunization strategies against the HIV.</p> http://www.virologyj.com/content/9/1/223 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Soares de Oliveira Ana Pessôa de Farias Rodrigo da Costa Antonio Sauer Mariana Bassichetto Katia Oliveira Solange Maria Costa Priscilla Tomiyama Claudia Tomiyama Helena Tomoko Sabino Ester Kallas Esper Sanabani Sabri |
spellingShingle |
Soares de Oliveira Ana Pessôa de Farias Rodrigo da Costa Antonio Sauer Mariana Bassichetto Katia Oliveira Solange Maria Costa Priscilla Tomiyama Claudia Tomiyama Helena Tomoko Sabino Ester Kallas Esper Sanabani Sabri Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men Virology Journal |
author_facet |
Soares de Oliveira Ana Pessôa de Farias Rodrigo da Costa Antonio Sauer Mariana Bassichetto Katia Oliveira Solange Maria Costa Priscilla Tomiyama Claudia Tomiyama Helena Tomoko Sabino Ester Kallas Esper Sanabani Sabri |
author_sort |
Soares de Oliveira Ana |
title |
Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men |
title_short |
Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men |
title_full |
Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men |
title_fullStr |
Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men |
title_full_unstemmed |
Frequency of subtype B and F1 dual infection in HIV-1 positive, Brazilian men who have sex with men |
title_sort |
frequency of subtype b and f1 dual infection in hiv-1 positive, brazilian men who have sex with men |
publisher |
BMC |
series |
Virology Journal |
issn |
1743-422X |
publishDate |
2012-09-01 |
description |
<p>Abstract</p> <p>Background</p> <p>Because various HIV vaccination studies are in progress, it is important to understand how often inter- and intra-subtype co/superinfection occurs in different HIV-infected high-risk groups. This knowledge would aid in the development of future prevention programs. In this cross-sectional study, we report the frequency of subtype B and F1 co-infection in a clinical group of 41 recently HIV-1 infected men who have sex with men (MSM) in São Paulo, Brazil.</p> <p>Methodology</p> <p>Proviral HIV-1 DNA was isolated from subject's peripheral blood polymorphonuclear leukocytes that were obtained at the time of enrollment. Each subject was known to be infected with a subtype B virus as determined in a previous study. A small fragment of the <it>integrase</it> gene (nucleotide 4255–4478 of HXB2) was amplified by nested polymerase chain reaction (PCR) using subclade F1 specific primers. The PCR results were further confirmed by phylogenetic analysis. Viral load (VL) data were extrapolated from the medical records of each patient.</p> <p>Results</p> <p>For the 41 samples from MSM who were recently infected with subtype B virus, it was possible to detect subclade F1 proviral DNA in five patients, which represents a co-infection rate of 12.2%. In subjects with dual infection, the median VL was 5.3 × 10<sup>4</sup> copies/ML, whereas in MSM that were infected with only subtype B virus the median VL was 3.8 × 10<sup>4</sup> copies/ML (p > 0.8).</p> <p>Conclusions</p> <p>This study indicated that subtype B and F1 co-infection occurs frequently within the HIV-positive MSM population as suggested by large number of BF1 recombinant viruses reported in Brazil. This finding will help us track the epidemic and provide support for the development of immunization strategies against the HIV.</p> |
url |
http://www.virologyj.com/content/9/1/223 |
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