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Burak KW, Law S, Rice C, Hu J, Fung CI, Woo AKH, Fonseca K, Lang ALS, Kanji JN, Meatherall BL. COVID-19 outbreak among physicians at a Canadian curling bonspiel: a descriptive observational study. CMAJ Open 2021; 9:E87-E95. [PMID: 33563638 PMCID: PMC8034378 DOI: 10.9778/cmajo.20200115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is known to occur among individuals who congregate in large groups, especially during indoor activities. Our objective was to provide a detailed clinical description of an outbreak of coronavirus disease 2019 (COVID-19) that occurred after a sporting and social event during the early days of the pandemic. METHODS We conducted a descriptive study of a curling bonspiel in Edmonton held on Mar. 11-14, 2020. We used standardized interviews between Apr. 17 and May 5, 2020, to collect demographic data, travel history, symptoms (type, onset and duration), self-reported testing results for SARS-CoV-2 ribonucleic acid (RNA) using reverse transcription polymerase chain reaction (RT-PCR), and clinical outcomes. We also obtained results of convalescent SARS-CoV-2 immunoglobulin G serology. RESULTS All 73 curlers (55 active health care workers) who participated in the bonspiel were interviewed for the study. Convalescent SARS-CoV-2 immunoglobulin G serology was completed in 62 (85%) participants. Of the 73 participants (55 [75%] male, median age 51 [range 26-79] yr, 58 [79%] physicians), 40 curlers (55%) tested positive for SARS-CoV-2 RNA by RT-PCR; an additional 16 participants developed symptoms but had negative swabs or were not tested (14 were probable cases), for a 74% attack rate (confirmed or probable cases). Anosmia with ageusia or dysgeusia occurred in 39 of 54 (72%) confirmed or probable cases. The clinical course was mild in most participants (1 emergency visit, no hospital admissions). Transmission likely occurred from multiple individuals with minor nonspecific symptoms during the event, possibly during shared meals. INTERPRETATION The 74% attack rate (confirmed or probable cases) highlights the infectivity of SARS-CoV-2 during sporting and social events. This reinforces the need for public health measures (masking, physical distancing and limiting the size of social gatherings) during future waves of COVID-19 in Canada.
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Affiliation(s)
- Kelly W Burak
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.
| | - Sampson Law
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Chris Rice
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Jia Hu
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Christopher I Fung
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Allan K H Woo
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Kevin Fonseca
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Amanda L S Lang
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Jamil N Kanji
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
| | - Bonnie L Meatherall
- Division of Gastroenterology and Hepatology (Burak), Department of Medicine, and Physician Learning Program (Burak, Law, Rice), Continuing Medical Education and Professional Development, and Cumming School of Medicine, University of Calgary; Alberta Health Services (Hu); Department of Community Health Sciences (Hu), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta.; Department of Radiology and Diagnostic Imaging (Fung), Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alta.; Division of Orthopedic Surgery (Woo), Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Sask.; Provincial Laboratory for Public Health (Fonseca), Alberta Precision Laboratories; Department of Microbiology, Immunology and Infectious Diseases (Fonseca), Cumming School of Medicine, University of Calgary, Calgary, Alta.; Roy Romano Provincial Lab (Lang), Saskatchewan Health Authority, Regina, Sask.; Division of Infectious Diseases (Kanji), Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; Provincial Laboratory for Public Health (Kanji), Alberta Precision Laboratories, Edmonton, Alta.; Division of Infectious Diseases (Meatherall), Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alta
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