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Virol J. 2015 Aug 8;12:120. doi: 10.1186/s12985-015-0355-8.

Diverse origins of hepatitis C virus in HIV co-infected men who have sex with men in Hong Kong.

Author information

1
Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China. denisechan@cuhk.edu.hk.
2
Centre for Health Protection, Department of Health, Hong Kong, China. adalinwc@dh.gov.hk.
3
Centre for Health Protection, Department of Health, Hong Kong, China. khwong@dh.gov.hk.
4
Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China. isswong@gmail.com.
5
Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Hong Kong, China. sslee@cuhk.edu.hk.

Abstract

BACKGROUND:

Worldwide, Hepatitis C (HCV) infection has been increasingly recognized in HIV-positive men who have sex with men (MSM). The objective of this study was to characterize the transmission dynamics of acute HCV infection in HIV-positive MSM in Hong Kong using a molecular approach.

FINDINGS:

We retrospectively examined 24 HIV-positive MSM with acute HCV infection diagnosed between 2009 and 2014 in Hong Kong. Detection and molecular characterization of HCV was successfully performed in 22 (91.7 %) patients. Genotype 3a was the most prevalent as identified in 14 (63.6 %) MSM, followed by 1a in 4 (18.2 %), 6a in 2 (9.1 %), and 1each (4.5 %) for 1b and 2a. The high prevalence of genotype 3a in MSM was in stark contrast to its rarity among HCV infected injection drug users (IDU) in Hong Kong. Phylogenetic analyses revealed a monophyletic HCV-3a cluster composing of MSM without injection history, and a homologous pair with HCV-6a genotype. There was otherwise no temporal or genetic clustering of the corresponding HIV sequences.

CONCLUSIONS:

The origin of sexually acquired acute HCV infections in HIV-positive MSM was diverse and not directly linked with local IDU. The transmission dynamics of HIV and HCV infections in MSM in Hong Kong were evidently unrelated.

PMID:
26253209
PMCID:
PMC4528697
DOI:
10.1186/s12985-015-0355-8
[Indexed for MEDLINE]
Free PMC Article

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