Microbial contamination of powered air purifying respirators (PAPR) used by healthcare staff during the COVID-19 pandemic: an in situ microbiological study

Source avec lien : American Journal of Infection Control, (Prépublication), . 10.1016/j.ajic.2021.02.006

Les respirateurs à adduction d’air pur (PAPR) sont une option pour les travailleurs de la santé qui ont besoin d’une protection respiratoire pendant le Covid-19 ; pendant la pandémie actuelle, ils sont partagés entre plusieurs personnes. Les cagoules PAPR sont destinées à des utilisations multiples par un seul utilisateur et peuvent présenter un risque d’infection entre les porteurs.

Background Powered air purifying respirators (PAPR) are an option for healthcare workers requiring respiratory protection during Covid-19; during the current pandemic, they are shared between multiple people. PAPR hoods are intended for multiple uses by a single user and may pose an infection risk between wearers. Methods Internal components of PAPR hoods and corrugated air supply hoses were swabbed for evidence of bacterial, fungal, common respiratory viruses and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) contamination. Results PAPR hoods were swabbed; ten (40%) returned positive results. Bacterial growth was detected on six PAPR; five of the PAPR tested positive for fungal growth; all tested negative for SARS-CoV-2 and common respiratory viruses. Conclusions Bacteria and fungi can remain on internal components of PAPR hoods and air supply hoses despite following recommended disinfection procedures. PAPR hoods have the potential to act as fomites, cross-infecting wearers and patients. Current guidelines for disinfecting PAPR hoods may not be effective for use in high risk healthcare environments.

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