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. 2023 May 22;13(5):e066504.
doi: 10.1136/bmjopen-2022-066504.

COVID-19 seroprevalence among local authority workers from Orléans Métropole, the Community of Communes of the Terres du Val de Loire, the local public service management centre of the Loiret department and the Region Centre Val de Loire: a prospective epidemiological study

Guerrout Hanane  1 , Zaouia Amine  1 , Naeck Roomila  2 , Thierry Prazuck  3 , Ammar Amirouche  4   5 , Vernay Olivier  6 , Amine Benyamina  4   5 , Raphaël Serreau  7   4
Affiliations

COVID-19 seroprevalence among local authority workers from Orléans Métropole, the Community of Communes of the Terres du Val de Loire, the local public service management centre of the Loiret department and the Region Centre Val de Loire: a prospective epidemiological study

Guerrout Hanane et al. BMJ Open. .

Abstract

Objective: To evaluate the SARS-CoV-2 seroprevalence among local authority workers, depending on their position and potential interaction with the public.

Methods: A cohort of volunteer participants was recruited among local authority workers of the Centre Val de Loire region in France, to be tested using a rapid serological test (COVID-PRESTO). The collected data were analysed by comparing different parameters including, gender, age, position held, and contact or not with the public. The study was carried out from August to December 2020 and included 3228 participants (n=3228), from 18 to 65 years old.

Results: The seroprevalence of SARS-CoV-2 among local authority workers was estimated at 3.04%. No significant difference could be observed according to the position held by the workers and whether they were or not in contact with the public. Nevertheless, a significant difference was observed between the different investigating centres, in correlation with the geographical location.

Conclusion: Contact with members of the public was not a critical parameter for SARS-CoV-2 seroprevalence as long as protective measures are applied. Among the population included in the study, childcare workers were more at risk of getting infected by the virus.

Trial registration number: NCT04387968.

Keywords: COVID-19; Epidemiology; Public health.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
COVID-PRESTO and COVID-VIRO test processing and interpretation. (A) COVID-PRESTO test carrying out and interpretation; (B) collection and preparation of the sample for the COVID-VIRO antigenic test; (C) COVID-VIRO test carrying out and interpretation.
Figure 2
Figure 2
Demographic characteristics and SARS-CoV-2 seroprevalence. (A) Distribution of workers ages and proportion of COVID-PRESTO positive tests; (B) distribution of workers genders and proportion of COVID-PRESTO positive tests.
Figure 3
Figure 3
Relation between occupation and SARS-CoV-2 seroprevalence. (A) Distribution of local authority workers occupation; (B) proportion of COVID-PRESTO positive tests among workers depending on their occupation being or not in contact with the public.
Figure 4
Figure 4
SARS-CoV-2 seroprevalence in the different local territories. CCTVL, Community of Communes of Terres Du Val De Loire.
See this image and copyright information in PMC

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