著者

勝浦 美沙子 岸 崇之 橋本 和典 石黒 久美子 小美野 勝 佐藤 和樹 阿部 和大 永井 智仁 西村 和幸 長原 光 永田 智

出版者

東京女子医科大学学会

雑誌

東京女子医科大学雑誌 (ISSN:00409022)

巻号頁・発行日

vol.90, no.3, pp.65-69, 2020-06-25 (Released:2020-06-25)

参考文献数

16

---

We report the clinical course of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in two Japanese teenagers.Patient 1: :A 17-year-old girl complained of a fever, sore throat, and back pain for 2 days. A nasopharyngeal swab polymerase chain reaction (PCR) test for SARS-CoV-2 revealed positivity on the 17th day after the onset of symptoms. There was no remarkable change in complete blood count (CBC) and biochemical data. The virus tested negative on day 23. Patient 2: A 14-year-old girl, the sister of patient 1, complained of cough alone, and a nasopharyngeal swab PCR test revealed positivity for SARS-CoV-2 on the first day of the onset of symptoms. Her symptoms improved 3 days later. There were no remarkable changes in CBC and biochemical data on a blood test or findings of chest X-ray screening. The virus tested negative on day 10.Both patients exhibited mild symptoms for only a few days. Neither of the patients developed severe pneumonia or acute respiratory distress syndrome. However, it took 23 days for patient 1 and 10 days for patient 2 from the onset of the first symptoms for the virus to test negative on nasopharyngeal swab PCR testing. These cases indicate that patients with mild symptoms may spread the SARS-CoV-2 for the same duration as that of symptomatic patients. Hence, infection control among asymptomatic patients is very important to avoid human-to-human transmission in families or communities.

著者

山本 友和 長原 光志 長野 司郎 伊東 繁 黒山 豊

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2003, no.5, pp.37-38, 2003-08-05

---

Now, coniferous trees of the enormous quantity that it planted in the days after the war reaches time to cut it down. But, it can't be said that no prospect of effectively using coniferous trees has yet emerged. To use that effectively, improvement to the high-performance wood is indispensable. In this paper, we try to destroy closed border pit membrane of Sugi (Japanese name, its scientific name is Cryptomeria japonica D.Don) to improve the permeability of water. And dried Sugi infused with several medicine to have it become a fire-resistant wood. Using the suitable strength of underwater shock wave, it is possible to destroy only closed border pit membrane but affect the original strength.