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- W3029129926 abstract "ObjectiveTo analyze the epidemic dynamics and distribution characteristics of influenza in Gansu province, so as to provide scientific basis for formulating prevention and control strategy. MethodsEtiological surveillance data of influenza in Gansu province from 2010 to 2016 were collected through the Chinese Influenza Surveillance Information System. The difference in the positive rates of viral nucleic acid and type constitution of influenza in different years, seasons, populations and regions were compared by Chi-square test. The geographic distribution maps were drawn by ArcGIS 10.2. ResultsA total of 54 795 samples of influenza-like illness were collected in Gansu province from 2010 to 2016, the positive detection rate of influenza virus nucleic acid was 14.77% (8 091/ 54 795). The main types of influenza virus were A(H1N1)pdm09, A(H3N2) and B, accounting for 98.89% (8 001/ 8 091) of all positive specimens. The statistical difference of positve rates existed among each surveillance year (x2=289.68, P<0.01), and the highest was in 2015-2016 (19.00%, 2 529/13 309). The influenza epidemic intensity showed a typical annual single-peak distribution in December to the next January. For positive detection rate of influenza virus and pathogen type composition, there were statistically significant differences among age groups (the Chi-square values were 589.06 and 173.53, respectively, and both P values were less than 0.01). The positive rate was the highest in the 5~14 years old group (21.36%, 2 765/12 942), and influenza B virus was predominant in this group (51.02%, 1 401/2 746). Both influenza positive rate and pathogen type composition had statistically significant differences in different regions (the Chi-square values were 430.82 and 233.47, respectively, and both P values were less than 0.01). The positive rate was the highest in Dingxi city (20.25%, 559/2 761). ConclusionsAnnual influenza vaccination campaigns should start in October to provide effective protection during the epidemic period. School was the key sites of influenza epidemic prevention and control. Influenza vaccination for 5~14 years old group would be helpful to the prevention and control of influenza.Key words: Influenza; Pathogen; Epidemics; Seasonality" @default.
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- W3029129926 date "2018-06-25" @default.
- W3029129926 modified "2023-09-23" @default.
- W3029129926 title "Analysis of epidemiological characteristics of influenza in Gansu province, 2010-2016" @default.
- W3029129926 doi "https://doi.org/10.3760/cma.j.issn.1673-4092.2018.03.004" @default.
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