Geographic Trends and Spread of the Pandemic (H1N1) 2009 in the Metropolitan Areas of Japan Studied from the National Sentinel Data
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- Inaida Shinako
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Japan
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- Yasui Yoshinori
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Japan
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- Tada Yuki
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Japan
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- Taniguchi Kiyosu
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Japan
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- Okabe Nobuhiko
- Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Japan
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<p>The identification of geographic trends of an influenza pandemic is important for analyzing its social epidemic factors. We performed spatiotemporal analyses focusing on the metropolitan areas in Japan by using the influenza-like illness (ILI) sentinel surveillance data for the pandemic (H1N1) 2009 and seasonal influenza. The epidemic curves and spread features expressed by the kriging method of geographic information system (GIS) and correlations between reported cases and demographic data were analyzed. The incidence of pandemic (H1N1) 2009 increased gradually at the beginning and showed more sporadic epidemic features compared to seasonal influenza. However, there were coincidental locations of patient clusters affected by the seasonal influenza, with a significant coefficient for the total sentinel reported cases (r = 0.71, P < 0.01). This suggested similar patterns of the epidemic over seasons. Patient clusters tended to be located in suburban areas, and there seemed to be stronger relationships between epidemics and higher ratio of larger families (with r = 0.26–0.35, P < 0.01, between ratio of families having more than 3 members and total reported cases in Tokyo and Nagoya areas). Whether populous areas had a greater probability of maintaining the epidemic patterns needs to be determined. Nonetheless, the patterns found in this study can be useful for further analyses for epidemic modeling and designing relevant controls.<tt> </tt></p>
収録刊行物
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- Japanese Journal of Infectious Diseases
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Japanese Journal of Infectious Diseases 64 (6), 473-481, 2011-11-30
国立感染症研究所 Japanese Journal of Infectious Diseases 編集委員会
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詳細情報 詳細情報について
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- CRID
- 1390854717761898496
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- NII論文ID
- 40019126132
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- NII書誌ID
- AA1132885X
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- ISSN
- 18842836
- 13446304
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- NDL書誌ID
- 023365143
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可