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Surveillance of human influenza A(H3N2) virus from 1999 to 2009 in southern Italy
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Surveillance of human influenza A(H3N2) virus from 1999 to 2009 in southern Italy
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Surveillance of human influenza A(H3N2) virus from 1999 to 2009 in southern Italy
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Journal Article
Surveillance of human influenza A(H3N2) virus from 1999 to 2009 in southern Italy
2014
Overview
The aim of this study was to evaluate the presence of influenza virus co-infections in humans and changes in the genetic variability of A(H3N2) virus strains in southern Italy from 1999 to 2009. A partial sequence of the haemagglutinin (HA) gene by human influenza H3N2 strains identified in oropharyngeal swabs from patients with influenza-like illness was analysed by DNA sequencing and a phylogenetic analysis was performed. During the seasons 1999–2000, 2002–2003, 2004–2005 and 2008–2009, the influenza viruses circulating belonged to subtype H3N2. However, A(H1N1) subtype virus and B type were respectively prevalent during the 2000–2001, 2006–2007, 2007–2008 and 2001–2002, 2003–2004, 2005–2006 seasons. The HA sequences appeared to be closely related to the sequence of the influenza A vaccine strain. Only the 2002–2003 season was characterized by co-circulation of two viral lineages: A/New York/55/01(H3N2)-like virus of the previous season and A/Fujian/411/02(H3N2)-like virus, a new H3 variant. In this study, over the decade analysed, no significant change was seen in the sequences of the HA gene of H3 viruses isolated.
Publisher
Cambridge University Press
Subject
Biological and medical sciences
/ Fundamental and applied biological sciences. Psychology
/ H3N2 subtype influenza A virus
/ Hemagglutinin Glycoproteins, Influenza Virus - genetics
/ Humans
/ Influenza A Virus, H3N2 Subtype - classification
/ Influenza A Virus, H3N2 Subtype - genetics
/ Influenza A Virus, H3N2 Subtype - isolation & purification
/ Influenza, Human - epidemiology
/ Mutation
/ Proteins
/ Seasons
/ Vaccines
/ Virology
/ Viruses
