Article Synopsis
- The study aimed to compare the presence of antibodies against the SARS-CoV-2 virus in healthcare workers versus a general patient population in an Austrian medical center.
- It involved testing 812 healthcare workers and 8451 patients over multiple time periods during the pandemic to measure the seroprevalence of the antibodies.
- Results showed similar rates of antibodies (around 12%) in both groups, indicating that healthcare workers and patients had comparable exposure to the virus throughout the pandemic.
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Article Abstract
Objectives: This study aimed to estimate and compare the prevalence of the virus-specific antibodies against the SARS-CoV-2 nucleoprotein antigen (anti-SARS-CoV-2 N) in healthcare workers and an all-comer paediatric and adult patient population.
Design, Setting And Participants: A longitudinal study enrolling healthcare professionals and concurrent serial cross-sectional studies of unselected all-comer patients were conducted at an Austrian academic medical centre. Healthcare workers were tested at enrolment and after 1, 2, 3, 6 and 12 months. The cross-sectional studies in patients were conducted at three time periods, which roughly coincided with the times after the first, second and third wave of SARS-CoV-2 in Austria (ie, 24 August-7 September 2020; 8-22 February 2021 and 9-23 November 2021). Anti-SARS-CoV-2 N antibodies were measured using a sandwich electrochemiluminescence assay (Roche).
Results: In total, 2735 and 9275 samples were measured in 812 healthcare workers (median age: 40 years, 78% female) and 8451 patients (median age: 55 years, 52% female), respectively. Over the entire study period, anti-SARS-CoV-2 N antibodies were detected in 98 of 812 healthcare workers, resulting in a seroprevalence of 12.1% (95% CI 10.0% to 14.5%), which did not differ significantly (p=0.63) from that of the all-comer patient population at the end of the study period (407/3184; 12.8%, 95% CI 11.7% to 14.0%). The seroprevalence between healthcare workers and patients did not differ significantly at any time and was 1.5-fold to 2-fold higher than the number of confirmed cases in Austria throughout the pandemic. In particular, there was no significant difference in the seroprevalence between paediatric and adult patients at any of the tested time periods.
Conclusion: Throughout the pandemic, healthcare staff and an adult and paediatric all-comer patient population had similar exposure to SARS-CoV-2.
Trial Registration Number: ClinicalTrials.gov Identifier: NCT04407429.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9852740 | PMC |
| http://dx.doi.org/10.1136/bmjopen-2022-063760 | DOI Listing |
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