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Anosmia and dysgeusia associated with SARS-CoV-2 infection: an age-matched case-control study.
Carignan, Alex; Valiquette, Louis; Grenier, Cynthia; Musonera, Jean Berchmans; Nkengurutse, Delphin; Marcil-Héguy, Anaïs; Vettese, Kim; Marcoux, Dominique; Valiquette, Corinne; Xiong, Wei Ting; Fortier, Pierre-Hughes; Généreux, Mélissa; Pépin, Jacques.
  • Carignan A; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que. Alex.Carignan@USherbrooke
  • Valiquette L; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Grenier C; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Musonera JB; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Nkengurutse D; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Marcil-Héguy A; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Vettese K; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Marcoux D; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Valiquette C; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Xiong WT; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Fortier PH; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Généreux M; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
  • Pépin J; Departments of Microbiology and Infectious Diseases (Carignan, L. Valiquette, Grenier, Musonera, Nkengurutse, Marcil-Héguy, Vettese, Marcoux, C. Valiquette, Xiong, Pépin), Surgery (Fortier) and Community Health Sciences (Généreux), Université de Sherbrooke, Sherbrooke, Que.
CMAJ ; 192(26): E702-E707, 2020 06 29.
Article in English | MEDLINE | ID: covidwho-423000
ABSTRACT

BACKGROUND:

Anosmia and dysgeusia have been reported as potential symptoms of coronavirus disease 2019. This study aimed to confirm whether anosmia and dysgeusia are specific symptoms among those who tested positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

METHODS:

We conducted an age-matched case-control study in the Eastern Townships region of Quebec between Mar. 10 and Mar. 23, 2020. We included adults (age ≥ 18 yr) who tested positive for SARS-CoV-2 by reverse transcription polymerase chain reaction. Cases were matched (11) according to 5-year age groups with control patents selected randomly from among all patients who tested negative for SARS-CoV-2 during the same period. Demographic and laboratory information was collected from medical records. Clinical symptoms and comorbidities associated with anosmia and dysgeusia were obtained by telephone interview with a standardized questionnaire.

RESULTS:

Among 2883 people tested for SARS-CoV-2, we identified 134 positive cases (70 women [52.2%] and 64 men [47.8%]; median age 57.1 [interquartile range 41.2-64.5] yr). The symptoms independently associated with SARS-CoV-2 positivity in conditional logistic regression were anosmia or dysgeusia or both (adjusted odds ratio [OR] 62.9, 95% confidence interval [CI] 11.0-359.7), presence of myalgia (adjusted OR 7.6, 95% CI 1.9-29.9), blurred vision (adjusted OR 0.1, 95% CI 0.0-0.8) and chest pain (adjusted OR 0.1, 95% CI 0.0-0.6).

INTERPRETATION:

We found a strong association between olfactory and gustatory symptoms and SARS-CoV-2 positivity. These symptoms should be considered as common and distinctive features of SARS-CoV-2 infection and should serve as an indication for testing and possible retesting of people whose first test result is negative.
Subject(s)

Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / Dysgeusia / Olfaction Disorders Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid Limits: Adult / Aged / Female / Humans / Male / Middle aged Country/Region as subject: North America Language: English Journal: CMAJ Journal subject: Medicine Year: 2020 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / Dysgeusia / Olfaction Disorders Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid Limits: Adult / Aged / Female / Humans / Male / Middle aged Country/Region as subject: North America Language: English Journal: CMAJ Journal subject: Medicine Year: 2020 Document Type: Article