Wide-area Epidemics of Influenza and Pediatric Diseases from Infectious Disease Surveillance in Japan, 1999-2005
スポンサーリンク
概要
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BACKGROUND: Epidemics of infectious diseases usually start in small areas and subsequently become widespread widely. Although a method for detecting epidemics in public health center (PHC) areas has been proposed and used in the National Epidemiological Surveillance of Infectious Diseases in Japan, wide-area epidemics have not been fully investigated.METHODS: Using the abovementioned method, we defined an epidemic as that occurring for a week in at least one PHC area in a prefecture and a wide-area epidemic as that when the number of people living in epidemic PHC areas exceeds 30% of the prefectural population. The number of weeks of an epidemic or wide-area epidemic for influenza and 11 pediatric diseases was observed in 47 prefectures in Japan from 1999 through 2005.RESULTS: Epidemics and wide-area epidemics of influenza occurred for an average of 7.0 and 4.3 weeks in a year in a prefecture, respectively. The proportion of wide-area epidemics in epidemic weeks was 62%. The average number of wide-area epidemic weeks for pediatric diseases varied among diseases; it was more than 4 weeks for infectious gastroenteritis and herpangina and less than 1 week for pertussis, rubella, and measles. The proportion of wide-area epidemics in epidemic weeks was 28-41% for infectious gastroenteritis, hand-foot-mouth disease, and herpangina and less than 20% for other diseases.CONCLUSIONS: The frequency of wide-area epidemics of influenza and pediatric diseases in various prefectures was observed. Epidemics of infectious diseases such as influenza and herpangina occurring in small areas were likely to spread to wide areas.J Epidemiol 2007; 17: S23-S31.
著者
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野中 聡
旭川医科大学耳鼻咽喉科・頭頸部外科学講座
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野中 源一郎
九州大学薬学部
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野中 誠
昭和大学藤が丘病院呼吸器外科
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HASHIMOTO Shuji
Department of Physiologic Laboratory, National Cardiovascular Center
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MURAKAMI Yoshitaka
Department of Health Science, Shgia University of Medical Science
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NAGAI Masaki
Department of Public Health, Saitama Medical School
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KAWADO Miyuki
Department of Hygiene, Fujita Health University School of Medicine
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Izumida Michiko
Department of Public Health, Saitama Medical University Faculty of Medicine.
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Ohta Akiko
Department of Public Health, Saitama Medical University Faculty of Medicine.
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Tada Yuki
Infectious Disease Surveillance Center, National Institute of Infectious Diseases.
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Shigematsu Mika
Infectious Disease Surveillance Center, National Institute of Infectious Diseases.
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Yasui Yoshinori
Infectious Disease Surveillance Center, National Institute of Infectious Diseases.
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Taniguchi Kiyosu
Infectious Disease Surveillance Center, National Institute of Infectious Diseases.
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Tada Yuki
Infectious Disease Surveillance Center National Inst. Of Infectious Diseases.
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Nagai Masaki
Department Of Aeronautics And Astronautics University Of Tokyo
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Taniguchi Kiyosu
Infectious Disease Surveillance Center National Institute Of Infectious Disease
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Yasui Yoshinori
Infectious Disease Surveillance Center National Institute Of Infectious Diseases
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Hashimoto Shuji
Department Of Applied Biological Chemistry Faculty Of Agriculture Niigata University
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Murakami Yoshitaka
Department Of Health Science Shgia University Of Medical Science
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Shigematsu Mika
Infectious Disease Surveillance Center National Institute Of Infectious Diseases
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Kawado Miyuki
Department Of Epidemiology And Environmental Health Juntendo University School Of Medicine
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OHTA Akiko
Department of Biochemistry, Central Research Laboratories, Yamanouchi Pharmaceutical Co., Ltd.
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Hashimoto Shuji
Department of Hygiene, Fujita Health University School of Medicine.
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