SARS-CoV-2 Seropositivity among Dental Staff and the Role of
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Health care workers (HCWs) are at a high risk of infection owing to occupational exposure to patients and virus-contaminated surfaces. This study states that utilization of aspirating system along with HEPA filters are beneficial in prevalence of Covid-19.

The study by JDR Clinical & Translational Research (JDR CTR) was aimed to reveal and compare the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among patient-facing HCWs across 3 dental clinics equipped with different types of aspirating systems.

This retrospective cohort study included 157 HCWs from 3 dental clinics. All HCWs underwent serological testing once a week to detect immunoglobulin G and M antibodies against the SARS-CoV-2. The V6000 aspirating system with a vacuum controller and HEPA filters was used at clinics A and B, and the aspirated aerosol and air were evacuated and dissipated into the atmosphere. The VS900 aspirating vacuum pump without HEPA filters was used at clinic C. The aspirated aerosol and air were evacuated and dissipated into the operatories.

The study result was;

--The estimated prevalence of SARS-CoV-2 infection was 11.5% over a 5-mo follow-up. The prevalence of infection was unaffected by sex or the role of the member in the dental team (dentist/dental assistant).

--The prevalence of SARS-CoV-2 infection was significantly higher at clinic C (equipped with an aspirating vacuum pump without HEPA filters) than at other clinics.

In particular, the type of aspirating system used and the presence of HEPA filters could affect the prevalence of SARS-CoV-2 infection across dental clinics.

Source: https://doi.org/10.1177/2380084421993099
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