Literature DB >> 35586770

The first eleven cases of SARS-CoV-2 Omicron variant infection in Japan: A focus on viral dynamics.

Nobumasa Okumura1, Shinya Tsuzuki1,2,3, Sho Saito1, Tomoya Saito4, Satoshi Takasago5, Masayuki Hojo6, Noriko Iwamoto1, Norio Ohmagari1,2.   

Abstract

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant has spread rapidly worldwide. We report the clinical characteristics and threshold cycle (Ct) values of the first 11 patients infected with the SARS-CoV-2 Omicron variant in Japan. All patients were younger returnees from abroad; 10 patients had received two doses of vaccine. Estimated Ct values for the 11 patients were 6.0 (95% confidence interval [CI] 4.2-7.3) days for > 30, 10.6 (95% CI 9.5-11.9) days for > 35, 15.1 (95% CI 13.6-17.6) days for > 40, and 19.7 (95% CI 17.3- 23.7) days for > 45. Our results provide important insights for indicators of infection control. 2022, National Center for Global Health and Medicine.

Entities:  

Keywords:  B.1.1.529; COVID-19; characteristics; threshold cycle

Year:  2022        PMID： 35586770      PMCID： PMC9066457          DOI： 10.35772/ghm.2021.01124

Source DB:  PubMed          Journal:  Glob Health Med        ISSN： 2434-9186


  5 in total

1.  Predicting Infectious Severe Acute Respiratory Syndrome Coronavirus 2 From Diagnostic Samples.

Authors:  Jared Bullard; Kerry Dust; Duane Funk; James E Strong; David Alexander; Lauren Garnett; Carl Boodman; Alexander Bello; Adam Hedley; Zachary Schiffman; Kaylie Doan; Nathalie Bastien; Yan Li; Paul G Van Caeseele; Guillaume Poliquin
Journal:  Clin Infect Dis       Date:  2020-12-17       Impact factor: 9.079

2.  Viral RNA load as determined by cell culture as a management tool for discharge of SARS-CoV-2 patients from infectious disease wards.

Authors:  Bernard La Scola; Marion Le Bideau; Julien Andreani; Van Thuan Hoang; Clio Grimaldier; Philippe Colson; Philippe Gautret; Didier Raoult
Journal:  Eur J Clin Microbiol Infect Dis       Date:  2020-04-27       Impact factor: 3.267

3.  Comparison of Rapid Antigen Tests for COVID-19.

Authors:  Seiya Yamayoshi; Yuko Sakai-Tagawa; Michiko Koga; Osamu Akasaka; Ichiro Nakachi; Hidefumi Koh; Kenji Maeda; Eisuke Adachi; Makoto Saito; Hiroyuki Nagai; Kazuhiko Ikeuchi; Takayuki Ogura; Rie Baba; Kensuke Fujita; Takahiro Fukui; Fumimaro Ito; Shin-Ichiro Hattori; Kei Yamamoto; Takato Nakamoto; Yuri Furusawa; Atsuhiro Yasuhara; Michiko Ujie; Shinya Yamada; Mutsumi Ito; Hiroaki Mitsuya; Norio Omagari; Hiroshi Yotsuyanagi; Kiyoko Iwatsuki-Horimoto; Masaki Imai; Yoshihiro Kawaoka
Journal:  Viruses       Date:  2020-12-10       Impact factor: 5.048

4.  Temporal profile and determinants of viral shedding and of viral clearance confirmation on nasopharyngeal swabs from SARS-CoV-2-positive subjects: a population-based prospective cohort study in Reggio Emilia, Italy.

Authors:  Pamela Mancuso; Francesco Venturelli; Massimo Vicentini; Cinzia Perilli; Elisabetta Larosa; Eufemia Bisaccia; Emanuela Bedeschi; Alessandro Zerbini; Paolo Giorgi Rossi
Journal:  BMJ Open       Date:  2020-09-02       Impact factor: 2.692

5.  Duration of infectiousness and correlation with RT-PCR cycle threshold values in cases of COVID-19, England, January to May 2020.

Authors:  Anika Singanayagam; Monika Patel; Andre Charlett; Jamie Lopez Bernal; Vanessa Saliba; Joanna Ellis; Shamez Ladhani; Maria Zambon; Robin Gopal
Journal:  Euro Surveill       Date:  2020-08
  5 in total
  3 in total

1.  Neutralising activity and antibody titre in 10 patients with breakthrough infections of the SARS-CoV-2 Omicron variant in Japan.

Authors:  Nobumasa Okumura; Shinya Tsuzuki; Sho Saito; Shin-Ichiro Hattori; Junko S Takeuchi; Tomoya Saito; Mugen Ujiie; Masayuki Hojo; Noriko Iwamoto; Wataru Sugiura; Hiroaki Mitsuya; Norio Ohmagari
Journal:  J Infect Chemother       Date:  2022-04-22       Impact factor: 2.065

2.  Duration of Infectious Virus Shedding by SARS-CoV-2 Omicron Variant-Infected Vaccinees.

Authors:  Kenichiro Takahashi; Masahiro Ishikane; Mugen Ujiie; Noriko Iwamoto; Nobumasa Okumura; Testsuro Sato; Maki Nagashima; Ataru Moriya; Michiyo Suzuki; Masayuki Hojo; Takayuki Kanno; Shinji Saito; Sho Miyamoto; Akira Ainai; Minoru Tobiume; Takeshi Arashiro; Tsuguto Fujimoto; Tomoya Saito; Masaya Yamato; Tadaki Suzuki; Norio Ohmagari
Journal:  Emerg Infect Dis       Date:  2022-03-15       Impact factor: 16.126

Review 3.  Percentage of Asymptomatic Infections among SARS-CoV-2 Omicron Variant-Positive Individuals: A Systematic Review and Meta-Analysis.

Authors:  Weijing Shang; Liangyu Kang; Guiying Cao; Yaping Wang; Peng Gao; Jue Liu; Min Liu
Journal:  Vaccines (Basel)       Date:  2022-06-30
  3 in total

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