Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada.
BACKGROUND:Phylogenetics has been used to investigate HIV transmission among men who have sex with men. This study compares several methodologies to elucidate the role of transmission chains in the dynamics of HIV spread in Quebec, Canada. METHODS:The Quebec Human Immunodeficiency Virus (HIV) genoty...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2019-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0213366 |
| _version_ | 1819016519264239616 |
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| author | Luc Villandré Aurélie Labbe Bluma Brenner Ruxandra-Ilinca Ibanescu Michel Roger David A Stephens |
| author_facet | Luc Villandré Aurélie Labbe Bluma Brenner Ruxandra-Ilinca Ibanescu Michel Roger David A Stephens |
| author_sort | Luc Villandré |
| collection | DOAJ |
| description | BACKGROUND:Phylogenetics has been used to investigate HIV transmission among men who have sex with men. This study compares several methodologies to elucidate the role of transmission chains in the dynamics of HIV spread in Quebec, Canada. METHODS:The Quebec Human Immunodeficiency Virus (HIV) genotyping program database now includes viral sequences from close to 4,000 HIV-positive individuals classified as Men who have Sex with Men (MSMs), collected between 1996 and early 2016. Assessment of chain expansion may depend on the partitioning scheme used, and so, we produce estimates from several methods: the conventional Bayesian and maximum likelihood-bootstrap methods, in combination with a variety of schemes for applying a maximum distance criterion, and two other algorithms, DM-PhyClus, a Bayesian algorithm that produces a measure of uncertainty for proposed partitions, and the Gap Procedure, a fast non-phylogenetic approach. Sequences obtained from individuals in the Primary HIV Infection (PHI) stage serve to identify incident cases. We focus on the period ranging from January 1st 2012 to February 1st 2016. RESULTS AND CONCLUSION:The analyses reveal considerable overlap between chain estimates obtained from conventional methods, thus leading to similar estimates of recent temporal expansion. The Gap Procedure and DM-PhyClus suggest however moderately different chains. Nevertheless, all estimates stress that longer older chains are responsible for a sizeable proportion of the sampled incident cases among MSMs. Curbing the HIV epidemic will require strategies aimed specifically at preventing such growth. |
| first_indexed | 2024-12-21T02:48:55Z |
| format | Article |
| id | doaj.art-422df02cd6c24a7a8cc4da251c8d486b |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T02:48:55Z |
| publishDate | 2019-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-422df02cd6c24a7a8cc4da251c8d486b2022-12-21T19:18:29ZengPublic Library of Science (PLoS)PLoS ONE1932-62032019-01-01143e021336610.1371/journal.pone.0213366Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada.Luc VillandréAurélie LabbeBluma BrennerRuxandra-Ilinca IbanescuMichel RogerDavid A StephensBACKGROUND:Phylogenetics has been used to investigate HIV transmission among men who have sex with men. This study compares several methodologies to elucidate the role of transmission chains in the dynamics of HIV spread in Quebec, Canada. METHODS:The Quebec Human Immunodeficiency Virus (HIV) genotyping program database now includes viral sequences from close to 4,000 HIV-positive individuals classified as Men who have Sex with Men (MSMs), collected between 1996 and early 2016. Assessment of chain expansion may depend on the partitioning scheme used, and so, we produce estimates from several methods: the conventional Bayesian and maximum likelihood-bootstrap methods, in combination with a variety of schemes for applying a maximum distance criterion, and two other algorithms, DM-PhyClus, a Bayesian algorithm that produces a measure of uncertainty for proposed partitions, and the Gap Procedure, a fast non-phylogenetic approach. Sequences obtained from individuals in the Primary HIV Infection (PHI) stage serve to identify incident cases. We focus on the period ranging from January 1st 2012 to February 1st 2016. RESULTS AND CONCLUSION:The analyses reveal considerable overlap between chain estimates obtained from conventional methods, thus leading to similar estimates of recent temporal expansion. The Gap Procedure and DM-PhyClus suggest however moderately different chains. Nevertheless, all estimates stress that longer older chains are responsible for a sizeable proportion of the sampled incident cases among MSMs. Curbing the HIV epidemic will require strategies aimed specifically at preventing such growth.https://doi.org/10.1371/journal.pone.0213366 |
| spellingShingle | Luc Villandré Aurélie Labbe Bluma Brenner Ruxandra-Ilinca Ibanescu Michel Roger David A Stephens Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. PLoS ONE |
| title | Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. |
| title_full | Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. |
| title_fullStr | Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. |
| title_full_unstemmed | Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. |
| title_short | Assessing the role of transmission chains in the spread of HIV-1 among men who have sex with men in Quebec, Canada. |
| title_sort | assessing the role of transmission chains in the spread of hiv 1 among men who have sex with men in quebec canada |
| url | https://doi.org/10.1371/journal.pone.0213366 |
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