Characteristics and transmission dynamics of COVID-19 in healthcare workers at a London teaching hospital

Source avec lien : Journal of Hospital Infection, (Prépublication), 7/28/2020. 10.1016/j.jhin.2020.07.025

Contexte Le COVID-19 associé aux travailleurs de la santé (HCW) est une préoccupation mondiale en raison du potentiel de propagation nosocomiale et de la diminution des effectifs. Cependant, la littérature sur les voies de transmission et les facteurs de risque de la COVID-19 chez les travailleurs de la santé est limitée. Objectif Examiner les caractéristiques et la dynamique de transmission du SRAS-CoV-2 chez les travailleurs de la santé dans un hôpital universitaire de Londres, au Royaume-Uni.

Background Healthcare worker (HCW) associated COVID-19 is of global concern due to the potential for nosocomial spread and depletion of staff numbers. However, the literature on transmission routes and risk factors for COVID-19 in HCWs is limited. Aim To examine the characteristics and transmission dynamics of SARS-CoV-2 in HCWs in a university teaching hospital in London, UK. Methods Staff records and virology testing results were combined to identify staff sickness and COVID-19 rates from March to April 2020. Comparisons were made with staff professional groups, department of work and ethnicity. Analysis was performed using Microsoft ExcelTM. Findings COVID-19 rates in our HCWs largely rose and declined in parallel with the number of community cases. White and non-white ethnic groups among our HCWs had similar rates of infection. Clinical staff had a higher rate of laboratory-confirmed COVID-19 than non-clinical staff, but total sickness rates were similar. Doctors had the highest rate of infection, but took the fewest sickness days. Critical Care had lower rates than the Emergency Department (ED), but rates in the ED declined once all staff were advised to use Personal Protective Equipment (PPE). Conclusion These findings show that sustained transmission of SARS-CoV-2 among our hospital staff did not occur, beyond the community outbreak, even in the absence of strict infection control measures in non-clinical areas. The results also suggest that current PPE is effective when used appropriately. In addition, our findings emphasise the importance of testing both clinical and non-clinical staff groups during a pandemic.

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