Seasonal influenza virus strains circulating in Malaysia from 2005 to 2009 |
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Authors: | Saat Zainah Abdul Rashid Tg Rogayah Tg Yusof Mohd Apandi Kassim Fauziah M Thayan Ravindran Kuen Lau Sau Othman Khairul Azuan Saraswathy T S |
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Institution: | Virology Unit, Infectious Disease Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia. zainah@imr.gov.my |
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Abstract: | From 2005 to 2009, the Institute for Medical Research (IMR), Kuala Lumpur received a total of 7,117 respiratory specimens from patients with influenza-like illness (ILI) for influenza screening. Seasonal influenza virus was isolated from 17.3% of patients with ILI in 2005, 31.6% in 2006, 12.8% in 2007, 10.2% in 2008 and 13.5% in 2009. There were one or more influenza A and B virus strains circulating in Malaysia throughout the year, with distinctly a peak in May to August. The predominant circulating strains of seasonal influenza A were A/California/7/2004-like (H3N2) in 2005, A/New Caledonia/20/99-like (H1N1) in 2006, A/ Brisbane/10/2007-like (H3N2) in 2007 and 2008, and A/Perth/16/2009-like (H3N2) virus in 2009. The predominant circulating strains of influenza B were B/Hong Kong/330/2001-like in 2005, B/Malaysia/2506/2004-like in 2006, B/Florida/4/2006-like in 2007 and 2008, and B/Brisbane/60/2008-like in 2009. |
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