Evaluation of filtration characteristics and microbial recovery rates of commercial filtering facepiece respirators against airborne bacterial particles

Jeong, Sang Bin; Ko, Hyun Sik; Seo, Sung Chul; Jung, Jae Hee

doi:10.1016/j.scitotenv.2019.05.153

Cited by 32 publications

(26 citation statements)

References 40 publications

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“…On average, the protection factors of FFPs have been reported to be from 11.5–15.9 times greater than those of surgical masks [ 14 ]. The filtration efficiency of FFPs may vary between 82 and 99%, depending on the different filtration grade [ 15 ]. There are different types of FFP respirators: N95, FFP2, FFP3.…”

Section: Discussionmentioning

confidence: 99%

Community Knowledge About the Use, Reuse, Disinfection and Disposal of Masks and Filtering Facepiece Respirators: Results of a Study Conducted in a Dermatology Clinic at the University of Naples in Italy

2020

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In Italy, as well as in almost all countries, the use of masks in public with several other measures has been an important health measure during the ongoing COVID-19 pandemic. The correct use of masks is essential, as a wrong use and disposal may increase the rate of contagious. Herein, we report a descriptive study evaluating the knowledge and use, reuse and disposal of masks in community settings. An anonymous questionnaire called MaSK (Mask uSe and Knowledge) questionnaire was developed and offered to patients referring at our dermatologic outpatient clinic. A total of 2562 full complete patients’ questionnaires were considered for the study. Our results showed that awareness and information campaigns aimed at the general population are urgently needed in order to implement a correct use of masks and limit as much as possible the infection rate.

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Section: Discussionmentioning

confidence: 99%

Community Knowledge About the Use, Reuse, Disinfection and Disposal of Masks and Filtering Facepiece Respirators: Results of a Study Conducted in a Dermatology Clinic at the University of Naples in Italy

2020

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“…Laboratory/controlled settings In experimental settings, N95 respirators demonstrate efficient filtration of nanoparticles and bioaerosols. [6][7][8][9] When compared with surgical masks in this setting, N95 respirators provide superior protection against aerosols and viruses similar in size to influenza, especially when combined with eye protection. 6 8 10-12 In one study, layering of up to five surgical masks improved in vivo filtration efficiency, though fit factor scores using this strategy remain markedly inferior to the minimum required for N95 respirators (13.7 vs 100).…”

Section: Medical-grade Facial Protectionmentioning

confidence: 99%

Facial protection for healthcare workers during pandemics: a scoping review

et al. 2020

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BackgroundThe coronavirus disease 2019 (COVID-19) pandemic has led to personal protective equipment (PPE) shortages, requiring mask reuse or improvisation. We provide a review of medical-grade facial protection (surgical masks, N95 respirators and face shields) for healthcare workers, the safety and efficacy of decontamination methods, and the utility of alternative strategies in emergency shortages or resource-scarce settings.MethodsWe conducted a scoping review of PubMed and grey literature related to facial protection and potential adaptation strategies in the setting of PPE shortages (January 2000 to March 2020). Limitations included few COVID-19-specific studies and exclusion of non-English language articles. We conducted a narrative synthesis of the evidence based on relevant healthcare settings to increase practical utility in decision-making.ResultsWe retrieved 5462 peer-reviewed articles and 41 grey literature records. In total, we included 67 records which met inclusion criteria. Compared with surgical masks, N95 respirators perform better in laboratory testing, may provide superior protection in inpatient settings and perform equivalently in outpatient settings. Surgical mask and N95 respirator conservation strategies include extended use, reuse or decontamination, but these strategies may result in inferior protection. Limited evidence suggests that reused and improvised masks should be used when medical-grade protection is unavailable.ConclusionThe COVID-19 pandemic has led to critical shortages of medical-grade PPE. Alternative forms of facial protection offer inferior protection. More robust evidence is required on different types of medical-grade facial protection. As research on COVID-19 advances, investigators should continue to examine the impact on alternatives of medical-grade facial protection.

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“…Электростатический эффект осаждения проявляется в значительной степени при наличии высокозаряженных частиц и/ или волокон [23]. При этом на поверхности ФВМ происходит накопление микроорганизмов, которые при повышенной влажности (за счет выдыхаемого воздуха) и температуры сохраняют свою патогенность, а некоторые из них могут и размножаться [36]. Кроме того, конденсация водяного пара в сочетании с соответствующей температурой и влажностью внутри СИЗОД (респиратора, полумаски) создает благоприятную среду для роста и размножения собственных патогенных бактерий (выдыхаемых пользователем), что представляет опасность для здоровья [37].…”

Section: биологические аэрозоли и способы их улавливанияunclassified