Publications by authors named "Vu Mai Phuong Hoang"

3 Publications

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Severe Acute Respiratory Syndrome Coronavirus 2 Shedding by Travelers, Vietnam, 2020.

Emerg Infect Dis 2020 07 21;26(7):1624-1626. Epub 2020 Jun 21.

We analyzed 2 clusters of 12 patients in Vietnam with severe acute respiratory syndrome coronavirus 2 infection during January-February 2020. Analysis indicated virus transmission from a traveler from China. One asymptomatic patient demonstrated virus shedding, indicating potential virus transmission in the absence of clinical signs and symptoms.
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http://dx.doi.org/10.3201/eid2607.200591DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7323563PMC
July 2020

Swine influenza viruses in Northern Vietnam in 2013-2014.

Emerg Microbes Infect 2018 Jul 2;7(1):123. Epub 2018 Jul 2.

WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, The University of Hong Kong-Hong Kong Special Administrative Region, Hong Kong, China.

Swine are an important intermediate host for emergence of pandemic influenza. Vietnam is the largest swine producer in South East Asia. Systematic virological and serological surveillance of swine influenza viruses was carried out in Northern Vietnam from May 2013 to June 2014 with monthly sampling of pigs in local and large collective slaughterhouses and in a live pig market. Influenza A seroprevalence in the local slaughterhouses and in the large collective slaughterhouse was 48.7% and 29.1%, respectively. Seventy-seven influenza A viruses were isolated, all from the large collective slaughterhouse. Genetic analysis revealed six virus genotypes including H1N1 2009 pandemic (H1N1pdm09) viruses, H1N2 with H1 of human origin, H3N2 and H1N1pdm09 reassortants, and triple-reassortant H3N2 viruses. Phylogenetic analysis of swine and human H1N1pdm09 viruses showed evidence of repeated spill-over from humans to swine rather than the establishment of H1N1pdm09 as long-term distinct lineage in swine. Surveillance at the large collective slaughterhouse proved to be the most efficient, cost-effective, and sustainable method of surveillance for swine influenza viruses in Vietnam.
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http://dx.doi.org/10.1038/s41426-018-0109-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6028489PMC
July 2018

Circulation of influenza B lineages in northern Viet Nam, 2007-2014.

Western Pac Surveill Response J 2015 Oct-Dec;6(4):17-23. Epub 2015 Nov 11.

National Institute of Hygiene and Epidemiology, Ha Noi, Viet Nam .

Introduction: Influenza B viruses circulate throughout Viet Nam, and their activities vary by region. There have been two antigenically distinct lineages of influenza B viruses co-circulating in the past 20 years; however, only one lineage is selected as a component of contemporary trivalent seasonal influenza vaccines. To improve the understanding of circulating influenza B lineages and influenza vaccine mismatches, we report the virus lineages circulating in northern Viet Nam over an eight-year period (2007-2014).

Methods: Lineages of 331 influenza B viruses were characterized by haemagglutination inhibition assay against standard reference ferret (Yamagata) and sheep (Victoria) antisera. Sequence analysis of the haemagglutinin gene was performed in 64 selected influenza B isolates.

Results: The proportion of influenza B lineages changed by year. The Yamagata lineage predominated in 2007, 2008 and 2012; the Victoria lineage predominated in 2009-2014 except 2012. The two lineages showed continuous evolution over time. The Northern Hemisphere's influenza vaccine components were mismatched with the predominant circulating viruses in 2007, 2009 and 2014.

Discussion: The seasonality of influenza B activity is more variable in tropical and subtropical regions than in temperate zones. Our data showed a common co-circulation of both influenza B lineages in northern Viet Nam, and it was difficult to predict which one was the predominant lineage. Quadrivalent influenza vaccines containing both lineages may improve the effectiveness of influenza vaccine programmes in the future.
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http://dx.doi.org/10.5365/WPSAR.2015.6.1.022DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4712529PMC
October 2016