@article{d89bd03871154161b0e034a997a8fb3b,
title = "Asymptomatic Cases and Limited Transmission of SARS-CoV-2 in Residents and Healthcare Workers in Three Dutch Nursing Homes",
abstract = "We aimed to assess the contribution of a- and presymptomatic residents and healthcare workers in transmission of SARS-CoV-2 in nursing homes. We conducted two serial point-prevalence surveys, including standardized symptom assessment and nasopharyngeal and oropharyngeal testing for SARS-CoV-2, among 297 residents and 542 healthcare workers of three Dutch nursing homes (NHs) with recent SARS-CoV-2 introduction. At the first point-prevalence survey, 15 residents tested positive of which one was presymptomatic and three remained asymptomatic. At the second point-prevalence survey one resident and one healthcare worker tested SARS-CoV-2 positive and both remained asymptomatic. Although a limited number of SARS-CoV-2 positive cases were identified, this study confirms a- and presymptomatic occurrence of Covid-19. We additionally describe factors that may contribute to the prevention of transmission. Taken together, our study complements the discussion on effective SARS-CoV-2 screening in NHs.",
keywords = "Covid-19, asymptomatic, nursing homes, screening, transmission",
author = "{van Buul}, {Laura W} and {van den Besselaar}, {Judith H} and Koene, {Fleur M H P H} and Buurman, {Bianca M} and Hertogh, {Cees M P M} and {COVID-19 NH-Study Group**}",
note = "Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Institute for Public Health and the Environment (Dutch: RIVM), Bilthoven, The Netherlands. Funding Information: We thank all nurses and physician assistants of the participating NHs and Public Health Services for their contribution to and/or performance of SARS-CoV-2 testing. We thank the persons from Amsterdam UMC who assisted in questionnaire administration. We thank the NHs for their participation in the study in general, and in particular those individuals involved in logistic and/or administrative aspects of the study. We thank the laboratories of the Franciscus Gasthuis & Vlietland, Erasmus Medical Center, Public Health Service of Amsterdam, Wageningen Bioveterinary Research, and Microvida for the performance of SARS-CoV-2 tests. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Institute for Public Health and the Environment (Dutch: RIVM), Bilthoven, The Netherlands. Publisher Copyright: {\textcopyright} The Author(s) 2020. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",
year = "2020",
doi = "10.1177/2333721420982800",
language = "English",
volume = "6",
pages = "2333721420982800",
journal = "Gerontology & geriatric medicine",
issn = "2333-7214",
publisher = "SAGE Publications Inc.",
}