Influenza surveillance in Pune, India: Reappearance of B/Victoria/2/87-like influenza virus strain in 2002
نویسندگان
چکیده
Increase in the number of acute respiratory infection cases was observed in the month of February 2002 at Pune, India. A total of 11 clinical samples were positive for influenza viral antigen and virus isolates were obtained from eight samples. Antigenic and genetic analyses of these isolates identified them to be similar to B/Beijing/243/97 belonging to the B/Victoria/2/87 lineage. B/Victoria/2/87-like strains were circulating in Pune during 1987–89, whereas strains belonging to B/Yamagata/16/88 lineage were circulating between 1990 and 2001. Isolation of B/Victoria/2/87-like strains in 2002 indicates reappearance of this strain in the community, highlighting the need for regular influenza strain surveillance for effective control measures.
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