9 0 0 0 OA ウイルス感染症対策としてのCO2濃度の利用にむけた値の解釈について
- 著者
- 奥田 知明 村上 道夫 内藤 航 篠原 直秀 藤井 健吉
- 出版者
- 一般社団法人 日本リスク学会
- 雑誌
- リスク学研究 (ISSN:24358428)
- 巻号頁・発行日
- pp.SRA-0364, (Released:2021-04-30)
- 参考文献数
- 32
Since airborne transmission has been considered as a possible infection route for the novel coronavirus in addition to contact and droplet infection routes, ventilation is an important measure against airborne route. In this paper, we describe the history of setting regulatory standard values and the interpretation of CO2 concentration as a measure against infectious diseases. Although the standard value of 1,000 ppm is not intended originally for infection control, it is practically useful as a guide value for potential infection risk management.
- 著者
- 横畑 綾治 石田 悠記 西尾 正也 山本 哲司 森 卓也 鈴木 不律 蓮見 基充 岡野 哲也 森本 拓也 藤井 健吉
- 出版者
- 一般社団法人 日本リスク学会
- 雑誌
- リスク学研究 (ISSN:24358428)
- 巻号頁・発行日
- vol.30, no.1, pp.5-28, 2020-09-25 (Released:2020-10-09)
- 参考文献数
- 87
- 被引用文献数
- 9
Coronavirus disease 2019 (COVID-19) is an emerging social risk with a rapid increase in cases of 5,200,000 and deaths of 330,000 (23/May/2020) since its first identification in Wuhan China, in December 2019. The COVID-19 is spreading all over the world as an emerging pandemic, and global society need fundamental risk management concepts against SARS-CoV-2 infection. Human-to-human transmissions have been facilitating via droplets and contaminated surfaces to hands. Therefore, we developed the systematic review comprehensively using available information about coronaviruses on environmental surfaces and inactivation mechanisms of antiviral chemicals possible to apply as chemical disinfectants. The analysis of literatures revealed that SARS-CoV-2 can persist on environmental surfaces like plastics and glasses for up to 7 days, but might be efficiently inactivated with 45–81% ethanol, 50–80% 2-propanol, 0.05–0.3% benzalkonium chloride, various detergents, >0.5% hydrogen peroxide or >0.045% sodium hypochlorite within 30 sec–10 min or 30 min. As no specific therapies are available for SARS-CoV-2, we propose the risk mitigation on the contact infection route by anti-virus household products is promising for prevention of further spread via hands to mouth, nose, and eyes. and to control this novel social problem.
2 0 0 0 OA ウイルス感染症対策としてのCO2濃度の利用にむけた値の解釈について
- 著者
- 奥田 知明 村上 道夫 内藤 航 篠原 直秀 藤井 健吉
- 出版者
- 一般社団法人 日本リスク学会
- 雑誌
- リスク学研究 (ISSN:24358428)
- 巻号頁・発行日
- vol.30, no.4, pp.207-212, 2021-06-25 (Released:2021-06-23)
- 参考文献数
- 32
- 被引用文献数
- 1
Since airborne transmission has been considered as a possible infection route for the novel coronavirus in addition to contact and droplet infection routes, ventilation is an important measure against airborne route. In this paper, we describe the history of setting regulatory standard values and the interpretation of CO2 concentration as a measure against infectious diseases. Although the standard value of 1,000 ppm is not intended originally for infection control, it is practically useful as a guide value for potential infection risk management.
- 著者
- 増川 克典 白石 晶子 高田 郁美 早瀬 温子 森 卓也 田中 紀行 藤井 健吉
- 出版者
- 一般社団法人 日本リスク学会
- 雑誌
- リスク学研究 (ISSN:24358428)
- 巻号頁・発行日
- pp.SRA-0420, (Released:2022-07-01)
- 参考文献数
- 39
Aiming at solving a social challenge for compatibility of infection risk mitigation with better QOL to prevent viral contact infection via hands, an effect of ethanol (EtOH) combined with benzalkonium chloride (BC) on inactivation of Influenza virus A (IVA) and SARS-CoV-2 was investigated under conditions of exposure time, 30 sec. Although either just 20–30 vol% EtOH or just 0.05w/v% BC were weak for the inactivation, the combination showed the synergic effects. It was also demonstrated that a commercial hand sanitizer containing both 44 vol% EtOH and 0.05w/v% BC is effective to highly inactivate IVA and SARS-CoV-2. The consideration on the practical usage of hand sanitizers suggests that 20–50 vol% EtOH combined with 0.05 w/v% BC would be effective and beneficial. The COVID-19 pandemic has revealed the emerging importance of community infection control which is different from a long-term challenge on hospital infection management, and a new hand sanitizing-system using lower EtOH combined with BC is expected to be a measure of community infection control.
- 著者
- 小野 恭子 藤井 健吉 大沼 進
- 出版者
- 一般社団法人 日本リスク学会
- 雑誌
- リスク学研究 (ISSN:24358428)
- 巻号頁・発行日
- vol.30, no.3, pp.143-146, 2021-04-25 (Released:2021-04-24)
- 参考文献数
- 6
The committee of Society for Risk Analysis, Japan translated a report “COVID-19 a risk governance perspective” into Japanese, which was published by International Risk Governance Center (IRGC). This article introduces the Japanese translation of the report to share the state-of-art of risk governance methodology for Japanese readers. IRGC risk governance framework, which can be used as a structured method for examining the steps of solving various risk problems, was customized to COVID-19. IRGC proposed the five stages of the framework as follows: scientific assessment, perception, evaluation, management and communication. IRGC re-organized procedures which were used for cope with COVID-19 problems on these 5 stages and listed remaining challenges for each stage. Finally, IRGC listed 10 lessons (might be) learned for the immediate future.
1 0 0 0 OA 水中の健康関連微生物リスク研究の歴史的変遷と最先端
- 著者
- 三浦 尚之 渡部 徹 藤井 健吉 金谷 祐里 田中 宏明 村上 道夫
- 出版者
- 一般社団法人日本リスク学会
- 雑誌
- 日本リスク研究学会誌 (ISSN:09155465)
- 巻号頁・発行日
- vol.27, no.2, pp.71-81, 2018-05-25 (Released:2018-06-09)
- 参考文献数
- 44
In developed countries with water supply and sewerage systems, risk of waterborne infectious diseases caused by pathogenic bacteria has been controlled at a certain level employing the water quality standards using fecal indicator bacteria. However, behavior of viruses and protozoa in water treatment processes or environmental water is different from those of indicator bacteria, and a quantitative microbial risk assessment (QMRA) approach for the management of risk from specific pathogenic microorganisms has been used in the U.S., etc. In this review article, we overview the waterborne microbial risk studies on the leading edge with pointing out some critical issues in this field. The topics include environmental survey on microbial contamination, risk assessment and modeling, risk management, and risk communication.