Seroprevalence of Antibodies against SARS-CoV-2 Infection among Healthcare Workers at a Tertiary Hospital in Saudi Arabia

Abstract

Background The nature of the healthcare workers' jobs standing at the frontline against the coronavirus disease 2019 (COVID-19) puts them at a higher risk of unknowingly contracting the disease and potentially contributing to the spread. This study aims to assess the overall positive seroconversion prevalence of SARS-CoV-2. Methods This is a longitudinal cohort study of healthcare workers at a tertiary hospital serving patients in several districts in the Eastern Province of Saudi Arabia. Participants were recruited between June - December 2020. Each participant had a serology blood test and completed the World Health Organization's risk factors assessment questionnaire. Results This study included 682 participants working in any capacity at a tertiary hospital, representing 15.7% of our population. Only 87 participants tested positive for SARS-CoV-2 antibodies, a prevalence of 12.7% of all participants. Of the 87 participants, 17 participants never tested positive for COVID-19 rt-PCR before the study, a prevalence of 2.9%. Moreover, the improper technique of using alcohol-based hand rub or soap and water after the risk of body fluid exposure and wearing personal protective equipment when indicated were found to be statistically significant to having positive SARS-CoV-2 IgG assay with P=0.02, P=0.03, and CI: 95% respectively. Conclusion Positive seroconversion rate was considerably low during the first wave of COVID-19 amongst our healthcare workers and similar to other healthcare organizations in Saudi Arabia. Seropositivity correlated significantly with adherence to infection prevention and control recommendations.