EEID 2021 Poster発表（我妻奎太さん）

当教室の我妻奎太さんの活躍をお届けします
Poster発表は6月17日（木）でした🚀

https://www.eeidconference2021.org/room-2/

ABSTRACTS SUBMISSION

253_Keita Wagatsuma ‐ Division of International Health (Public Health), Graduate School of
Medical and Dental Sciences, Niigata University ‐ Japon

Shifts in the epidemic season of human respiratory syncytial virus associated with inbound
overseas travelers and meteorological conditions in Japan

Keita Wagatsuma, Reiko Saito

Division of International Health (Public Health), Graduate School of Medical and Dental Sciences,
Niigata University, Niigata 951‐8510, Japan

Few studies have examined the effects of inbound overseas travelers and meteorological conditions on the shift in human respiratory syncytial virus (HRSV) season in Japan. This study aims to test whether the number of inbound overseas travelers and meteorological conditions are associated with the onset week of HRSV epidemic season. The estimation of onset week for 46 prefectures (except for Okinawa prefecture) in Japan for 4‐year period (2014–2017) was obtained from previous papers based on the national surveillance data. We obtained data on the yearly number of inbound overseas travelers and meteorological (yearly mean temperature and relative humidity) conditions from Japan National Tourism Organization (JNTO) and Japan Meteorological Agency (JMA), respectively. Multi‐level mixed‐effects linear regression analysis showed that every 1 person (per 100,000 population) increase in number of overall inbound overseas travelers led to an earlier onset week of HRSV epidemic season in the year by 0.02 week (coefficient –0.02; P<0.01). Higher mean temperature and higher relative humidity were also found to contribute to an earlier onset week by 0.30 week (coefficient –0.30; P<0.05) and 0.18 week (coefficient –0.18; P<0.01), respectively. Additionally, models that included the number of travelers from individual countries (Taiwan, South Korea, and China) except Australia showed that both the number of travelers from each country and meteorological conditions contributed to an earlier onset week. Our analysis showed the earlier onset week of HRSV epidemic season in Japan is associated with increased number of inbound overseas travelers, higher mean temperature, and relative humidity.
The impact of international travelers on seasonality of HRSV can be further extended to investigations on thechanges of various respiratory infectious diseases especially after the coronavirus disease 2019 (COVID‐19) pandemic.

1. What is your pathogen? Multiple options possible (e.g. if working on coinfections)
Coronavirus : SARS‐CoV‐2
Other viruses : Influenza virus
Other : Respiratory syncytial virus
2. On a scale of 1‐5 is your work mostly eco/epidemiological or evolutionary? 1 (100% eco/epidemiological)
3. On a scale of 1‐5 is your work mostly theoretical or experimental/empirical?
2

さて、令和3年も早いもので、あれよあれよと半年が過ぎてしまいました。
半年を過ぎてもなお、我妻さんの活躍（勢い）はとどまる気配はないように思われます。
ブログ更新をしている私も活躍を載せられて、嬉しいです👩🏻
梅雨のジメジメが続いておりますが、白山神社の紫陽花が見頃でした🐌

ｂｙやまざき