Community Prevalence of SARS-CoV-2 Among Patients With Influenzalike Illnesses Presenting to a Los Angeles Medical Center in March 2020 | Geriatrics | JAMA

/2764137

  • Pourcentage de PCR SARS-Cov2 positif dans les syndromes grippaux: 5% dans les cas légers.

    Community Prevalence of #SARS-CoV-2 Among Patients With Influenzalike Illnesses Presenting to a Los Angeles Medical Center in March 2020 | Geriatrics | JAMA | JAMA Network
    https://jamanetwork.com/journals/jama/fullarticle/2764137

    (”These patients had sufficiently mild illness to be active in the community throughout their illness, increasing the possibility of #transmission.”)

    (PCR for influenza, respiratory syncytial virus and SARS-CoV-2)

    One hundred thirty-one tests for SARS-CoV-2 were obtained and 7 were positive ( 5.3% ; 95% CI, 2.2%-10.7%). The median age of patients who tested positive was 38 years (range, 34-44 years), 3 were male (43%), and the median duration of symptoms was 4 days (range, 2-4 days) at presentation. Six of 7 patients presented with fever, 5 with myalgias, and only 1 with cough. Only 1 patient had a travel history (returned from Miami, Florida). All patients had mild illnesses, and all tested negative for influenza and respiratory syncytial virus.

    #covid-19 #coronavirus #etats-unis

    • Dans les cas un peu plus sévères, 8%,

      Rapid Sentinel Surveillance for COVID-19 — Santa Clara County, California, March 2020 | MMWR
      https://www.cdc.gov/mmwr/volumes/69/wr/mm6914e3.htm

      Among 226 patients who met the inclusion criteria [patients with respiratory symptoms (e.g., fever, cough, or shortness of breath)], 23% had positive test results for influenza. Among patients who had negative test results for influenza, 79 specimens were tested for SARS-CoV-2, and 11% had evidence of infection.

      [...]

      If it is assumed there were no influenza and SARS-CoV-2 coinfections and that persons with negative test results for influenza and not tested for SARS-CoV-2 were similar to those who were tested, then an estimated 8% (19 of 226) of persons seen at participating urgent care centers with respiratory symptoms had COVID-19. This is similar to the 5% SARS-CoV-2 infection rate identified among patients evaluated for mild influenza-like illness at one Los Angeles medical center during a similar time frame (étude du JAMA).