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Objective: To investigate the influenza epidemic law Urumqi, easy to do prevention and control of influenza. Urumqi, while prevention and control of influenza virus mutation basis for the study. Methods: Chinese Influenza Center influenza surveillance system for the 2007-2010 influenza Urumqi etiology monitored. Results: Through the Urumqi City from 2007 to 2010 found that influenza surveillance data were analyzed: 1, in the 2007/2008 annual monitoring of ILI Specimens collected 127 copies, of which the detection of influenza virus type B (Victoria line) 1, B type (Yamagata) 6 strains, the detection rate was 5.51%. In the 2008/2009 annual monitoring of ILI Specimens collected 203 copies, of which the detection of influenza virus type B All (Victoria) 13 strains, the detection rate was 6.40%. In the 2009/2010 monitoring year, Urumqi epidemic outbreak of new influenza A H1N1, influenza-like specimens were collected from 1218, of which the detection of influenza virus-positive strains 504, 454 for the new influenza A H1N1, 8 株 A1 (H1N1) subtype strains, 12 of A3 (H3N2), 30 株 B (Victoria), the detection rate was 41.38%; virus isolation rate in 2009/2010 the maximum annual monitoring. Two, three years from 0 to 19 years of positive rates of different strains of influenza viruses, including the 2009/2010 influenza virus-positive height in 2007/2008, 2008/2009. 2009/2010 in all age groups showed no significant difference (χ2 = 8.895, P = 0.113). Respectively, for the three years through sex between different influenza virus positive rate was no significant difference (P values ??were greater than .05). 3, through the three years to monitor strains of influenza virus-positive time distribution analysis, 2007/2008 peak of positive strains detected in November 2007, 2008/2009, the peak positive strains detected in November 2008 and December, 2009/2010 positive strains detected in the peak in October 2009, November and December. Conclusion: influenza virus surveillance system to monitor Urumqi 2007-2010 annual analysis found that influenza activity peaks in Urumqi time for the annual winter and spring, and the advantages of each year an influenza pandemic strain will constantly changing. 1,2007 / 2008 influenza pandemic strain is the dominant type B (Yamagata Department), 2008/2009 epidemic advantage influenza B (Victoria line), 2009/2010 due to the outbreak of a new influenza A H1N1 full conversion to the new Influenza A H1N1, but the aftermath of the outbreak of influenza subtypes such as close to normal, predominant strains of B (Victoria) subtypes. Two, three years from 0 to 19 years of positive rates of different strains of influenza virus. Three years of influenza viruses between different genders no significant difference between the positive rate. 3, Urumqi City, beginning in 2007, the predominant strains of influenza virus type B, and the advantage has been and continues to 2008/2009, B-type strain and the rest of the country pop popular time period consistent with the advent of time. 4, seriously affecting the quality of the sample collection rate of virus isolation, collecting samples of the virus isolated qualified basis; 5, Urumqi influenza epidemic law with influenza epidemics in northern China basically consistent with the law, mainly reflected in the popular and dominant strains convert basic types same, the popular peak with other provinces in northern basic synchronization. According to the trend found in annual influenza strains of influenza outbreaks caused by the spring epidemic strains will becoming the predominant strains of influenza epidemics in winter, so the forecast from 2010 to 2011 flu pandemic strain may be advantages to B (Victoria) subtypes.
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