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Comparison of Influenza Epidemiological and Virological Characteristics between Outpatients and Inpatients in Zhejiang Province, China, March 2011–June 2015

Author

Listed:
  • Wei Cheng

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China
    Field Epidemiology Training Programme of Zhejiang Province, Hangzhou 310051, China)

  • Zhao Yu

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

  • Shelan Liu

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

  • Xueying Zhang

    (The University of Texas Health Science Center at Houston, School of Public Health, Houston, TX 77030, USA)

  • Xiaoxiao Wang

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

  • Jian Cai

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

  • Feng Ling

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

  • Enfu Chen

    (Zhejiang Provincial Centre for Disease Control and Prevention, Hangzhou 310051, China)

Abstract

Given the rapid rate of global spread and consequently healthcare costs related to influenza, surveillance plays an important role in monitoring the emerging pandemics in China. However, the characteristics of influenza in Southeast of China haven’t been fully studied. Our study use the surveillance data collected from 16 sentinel hospitals across Zhejiang Province during March 2011 through June 2015, including the demographic information and respiratory specimens from influenza-like illness (ILI) patients and severe acute respiratory illness (SARI) patients. As analysis results, most SARI and ILI patients were in the age group of 0–4 years old (62.38% of ILI and 71.54% of SARI). The respiratory specimens have statistically significantly higher positive rate for influenza among ILI patients than that among SARI patients ( p < 0.001). The comparison between ILI patients and SARI patients shows no statistically significantly difference in detecting influenza virus type and influenza A virus subtype. The SARI and ILI patients were found to be positively correlated for overall positive rate (r = 0.63, p < 0.001), the weekly percentage of A(H1N1)pdm09 (r = 0.51, p < 0.001), influenza B virus (r = 0.17, p = 0.013), and A/H3N2 (r = 0.43, p < 0.001) among all the positive numbers. Our study demonstrated that the activities of influenza virus, including its subtypes, had a similar temporal pattern between ILI and SARI cases.

Suggested Citation

  • Wei Cheng & Zhao Yu & Shelan Liu & Xueying Zhang & Xiaoxiao Wang & Jian Cai & Feng Ling & Enfu Chen, 2017. "Comparison of Influenza Epidemiological and Virological Characteristics between Outpatients and Inpatients in Zhejiang Province, China, March 2011–June 2015," IJERPH, MDPI, vol. 14(2), pages 1-12, February.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:2:p:217-:d:91143
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    References listed on IDEAS

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    1. Lei Zhou & Sujian Situ & Ting Huang & Shixiong Hu & Xianjun Wang & Xiaoping Zhu & Lidong Gao & Zhong Li & Ao Feng & Hui Jin & Shiyuan Wang & Qiru Su & Zhen Xu & Zijian Feng, 2013. "Direct Medical Cost of Influenza-Related Hospitalizations among Severe Acute Respiratory Infections Cases in Three Provinces in China," PLOS ONE, Public Library of Science, vol. 8(5), pages 1-6, May.
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