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  1. Article ; Online: In vitro virucidal activity of nebulized citrate-complexed silver nanoparticles against equine herpesvirus-1 and murine norovirus.

    Frippiat, Thibault / Dams, Lorène / Wielick, Constance / Delguste, Catherine / Ludwig-Begall, Louisa F / Art, Tatiana / Thiry, Etienne

    Virology

    2023  Volume 585, Page(s) 232–239

    Abstract: Viruses can be involved in respiratory disorders in horses, with limited therapeutic options. Citrate-complexed silver nanoparticles (C-AgNP) have shown bactericidal properties after in vitro nebulization. The aim of the present study was to assess the ... ...

    Abstract Viruses can be involved in respiratory disorders in horses, with limited therapeutic options. Citrate-complexed silver nanoparticles (C-AgNP) have shown bactericidal properties after in vitro nebulization. The aim of the present study was to assess the virucidal activity of C-AgNP after in vitro instillation or nebulization on equine herpesvirus-1 (EHV-1) and murine norovirus (MNV), the latter used as surrogate for small non-enveloped viruses. Both viruses were instilled or nebulized with C-AgNP of increasing concentrations, and titres were determined via TCID
    MeSH term(s) Animals ; Horses ; Mice ; Citric Acid ; Herpesvirus 1, Equid ; Silver/pharmacology ; Norovirus/physiology ; Metal Nanoparticles
    Chemical Substances Citric Acid (2968PHW8QP) ; Silver (3M4G523W1G)
    Language English
    Publishing date 2023-06-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 200425-2
    ISSN 1096-0341 ; 0042-6822
    ISSN (online) 1096-0341
    ISSN 0042-6822
    DOI 10.1016/j.virol.2023.06.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Rabies virus variants from bats closely related to variants found in marmosets (Callithrix jacchus), a neglected source of human rabies infection in Brazil.

    de Sousa, Larissa L F / de Souza, Tatiane L / Tibo, Luiz H S / Moura, Francisco B P / Junior, Francisco A S / de Oliveira-Filho, Edmilson F / Ludwig-Begall, Louisa F / Cabral-Miranda, Gustavo / Andreata-Santos, Robert / Janini, Luiz M R / Poon, Leo L M / Durães-Carvalho, Ricardo

    Journal of medical virology

    2023  Volume 95, Issue 8, Page(s) e29046

    Abstract: Rabies is a fatal viral zoonosis caused by rabies virus (RABV). RABV infects the central nervous system and triggers acute encephalomyelitis in both humans and animals. Endemic in the Brazilian Northeast region, RABV emergence in distinct wildlife ... ...

    Abstract Rabies is a fatal viral zoonosis caused by rabies virus (RABV). RABV infects the central nervous system and triggers acute encephalomyelitis in both humans and animals. Endemic in the Brazilian Northeast region, RABV emergence in distinct wildlife species has been identified as a source of human rabies infection and as such, constitutes a public health concern. Here, we performed post-mortem RABV analyses of 144 encephalic tissues from bats sampled from January to July 2022, belonging to 15 different species. We identified phylogenetically distinct RABV from Phyllostomidae and Molossidae bats circulating in Northeastern Brazil. Phylogenetic clustering revealed the close evolutionary relationship between RABV viruses circulating in bats and variants hosted in white-tufted marmosets, commonly captured to be kept as pets and linked to human rabies cases and deaths in Brazil. Our findings underline the urgent need to implement a phylogenetic-scale epidemiological surveillance platform to track multiple RABV variants which may pose a threat to both humans and animals.
    MeSH term(s) Animals ; Humans ; Callithrix ; Rabies virus/genetics ; Rabies/epidemiology ; Rabies/veterinary ; Brazil/epidemiology ; Chiroptera ; Phylogeny
    Language English
    Publishing date 2023-08-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 752392-0
    ISSN 1096-9071 ; 0146-6615
    ISSN (online) 1096-9071
    ISSN 0146-6615
    DOI 10.1002/jmv.29046
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The use of germicidal ultraviolet light, vaporized hydrogen peroxide and dry heat to decontaminate face masks and filtering respirators contaminated with a SARS-CoV-2 surrogate virus.

    Ludwig-Begall, L F / Wielick, C / Dams, L / Nauwynck, H / Demeuldre, P-F / Napp, A / Laperre, J / Haubruge, E / Thiry, E

    The Journal of hospital infection

    2020  Volume 106, Issue 3, Page(s) 577–584

    Abstract: Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering ... ...

    Abstract Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering facepiece respirators has been recommended; prior decontamination is paramount to their re-use.
    Aim: We aim to provide information on the effects of three decontamination procedures on porcine respiratory coronavirus (PRCV)-contaminated masks and respirators, presenting a stable model for infectious coronavirus decontamination of these typically single-use-only products.
    Methods: Surgical masks and filtering facepiece respirator coupons and straps were inoculated with infectious PRCV and submitted to three decontamination treatments, ultraviolet (UV) irradiation, vaporized H
    Findings: UV irradiation, vaporized H
    Conclusion: This is the first description of stable disinfection of face masks and filtering facepiece respirators contaminated with an infectious SARS-CoV-2 surrogate using UV irradiation, vaporized H
    MeSH term(s) Coronavirus Infections/prevention & control ; Decontamination/standards ; Equipment Reuse/standards ; Guidelines as Topic ; Hot Temperature ; Humans ; Hydrogen Peroxide/standards ; Respiratory Protective Devices/virology ; Surgical Equipment/standards ; Surgical Equipment/virology ; Ultraviolet Rays
    Chemical Substances Hydrogen Peroxide (BBX060AN9V)
    Keywords covid19
    Language English
    Publishing date 2020-09-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2020.08.025
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Of masks and methylene blue-The use of methylene blue photochemical treatment to decontaminate surgical masks contaminated with a tenacious small nonenveloped norovirus.

    Wielick, Constance / Fries, Allyson / Dams, Lorène / Razafimahefa, Ravo M / Heyne, Belinda / Harcourt, Brian H / Lendvay, Thomas S / Willaert, Jean-François / de Jaeger, Simon / Haubruge, Eric / Thiry, Etienne / Ludwig-Begall, Louisa F

    American journal of infection control

    2022  Volume 50, Issue 8, Page(s) 871–877

    Abstract: Background: In the context of the SARS-CoV-2 pandemic, reuse of personal protective equipment, specifically that of medical face coverings, has been recommended. The reuse of these typically single-use only items necessitates procedures to inactivate ... ...

    Abstract Background: In the context of the SARS-CoV-2 pandemic, reuse of personal protective equipment, specifically that of medical face coverings, has been recommended. The reuse of these typically single-use only items necessitates procedures to inactivate contaminating human respiratory and gastrointestinal pathogens. We previously demonstrated decontamination of surgical masks and respirators contaminated with infectious SARS-CoV-2 and various animal coronaviruses via low concentration- and short exposure methylene blue photochemical treatment (10 µM methylene blue, 30 minutes of 12,500-lux red light or 50,000 lux white light exposure).
    Methods: Here, we describe the adaptation of this protocol to the decontamination of a more resistant, non-enveloped gastrointestinal virus and demonstrate efficient photodynamic inactivation of murine norovirus, a human norovirus surrogate.
    Results: Methylene blue photochemical treatment (100 µM methylene blue, 30 minutes of 12,500-lux red light exposure) of murine norovirus-contaminated masks reduced infectious viral titers by over four orders of magnitude on surgical mask surfaces.
    Discussion and conclusions: Inactivation of a norovirus, the most difficult to inactivate of the respiratory and gastrointestinal human viruses, can predict the inactivation of any less resistant viral mask contaminant. The protocol developed here thus solidifies the position of methylene blue photochemical decontamination as an important tool in the package of practical pandemic preparedness.
    MeSH term(s) Animals ; COVID-19/prevention & control ; Decontamination/methods ; Equipment Reuse ; Humans ; Masks/virology ; Methylene Blue/toxicity ; Mice ; Norovirus ; SARS-CoV-2
    Chemical Substances Methylene Blue (T42P99266K)
    Language English
    Publishing date 2022-07-31
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 392362-9
    ISSN 1527-3296 ; 0196-6553
    ISSN (online) 1527-3296
    ISSN 0196-6553
    DOI 10.1016/j.ajic.2022.01.024
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: "Don, doff, discard" to "don, doff, decontaminate"-FFR and mask integrity and inactivation of a SARS-CoV-2 surrogate and a norovirus following multiple vaporised hydrogen peroxide-, ultraviolet germicidal irradiation-, and dry heat decontaminations.

    Ludwig-Begall, Louisa F / Wielick, Constance / Jolois, Olivier / Dams, Lorène / Razafimahefa, Ravo M / Nauwynck, Hans / Demeuldre, Pierre-Francois / Napp, Aurore / Laperre, Jan / Thiry, Etienne / Haubruge, Eric

    PloS one

    2021  Volume 16, Issue 5, Page(s) e0251872

    Abstract: Background: As the SARS-CoV-2 pandemic accelerates, the supply of personal protective equipment remains under strain. To combat shortages, re-use of surgical masks and filtering facepiece respirators has been recommended. Prior decontamination is ... ...

    Abstract Background: As the SARS-CoV-2 pandemic accelerates, the supply of personal protective equipment remains under strain. To combat shortages, re-use of surgical masks and filtering facepiece respirators has been recommended. Prior decontamination is paramount to the re-use of these typically single-use only items and, without compromising their integrity, must guarantee inactivation of SARS-CoV-2 and other contaminating pathogens.
    Aim: We provide information on the effect of time-dependent passive decontamination (infectivity loss over time during room temperature storage in a breathable bag) and evaluate inactivation of a SARS-CoV-2 surrogate and a non-enveloped model virus as well as mask and respirator integrity following active multiple-cycle vaporised hydrogen peroxide (VHP), ultraviolet germicidal irradiation (UVGI), and dry heat (DH) decontamination.
    Methods: Masks and respirators, inoculated with infectious porcine respiratory coronavirus or murine norovirus, were submitted to passive decontamination or single or multiple active decontamination cycles; viruses were recovered from sample materials and viral titres were measured via TCID50 assay. In parallel, filtration efficiency tests and breathability tests were performed according to EN standard 14683 and NIOSH regulations.
    Results and discussion: Infectious porcine respiratory coronavirus and murine norovirus remained detectable on masks and respirators up to five and seven days of passive decontamination. Single and multiple cycles of VHP-, UVGI-, and DH were shown to not adversely affect bacterial filtration efficiency of masks. Single- and multiple UVGI did not adversely affect respirator filtration efficiency, while VHP and DH induced a decrease in filtration efficiency after one or three decontamination cycles. Multiple cycles of VHP-, UVGI-, and DH slightly decreased airflow resistance of masks but did not adversely affect respirator breathability. VHP and UVGI efficiently inactivated both viruses after five, DH after three, decontamination cycles, permitting demonstration of a loss of infectivity by more than three orders of magnitude. This multi-disciplinal approach provides important information on how often a given PPE item may be safely reused.
    MeSH term(s) Anti-Infective Agents/pharmacology ; COVID-19/epidemiology ; COVID-19/metabolism ; COVID-19/virology ; Decontamination/methods ; Equipment Reuse ; Hot Temperature ; Humans ; Hydrogen Peroxide/pharmacology ; Masks/microbiology ; Norovirus/drug effects ; Norovirus/isolation & purification ; Pandemics ; Personal Protective Equipment/microbiology ; Personal Protective Equipment/supply & distribution ; Respiratory Protective Devices/microbiology ; SARS-CoV-2/drug effects ; SARS-CoV-2/isolation & purification ; Ultraviolet Rays ; Ultraviolet Therapy ; Ventilators, Mechanical/microbiology ; Volatilization
    Chemical Substances Anti-Infective Agents ; Hydrogen Peroxide (BBX060AN9V)
    Language English
    Publishing date 2021-05-19
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0251872
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: The use of germicidal ultraviolet light, vaporized hydrogen peroxide and dry heat to decontaminate face masks and filtering respirators contaminated with a SARS-CoV-2 surrogate virus

    Ludwig-Begall, L.F. / Wielick, C. / Dams, L. / Nauwynck, H. / Demeuldre, P-F. / Napp, A. / Laperre, J. / Haubruge, E. / Thiry, E.

    Journal of Hospital Infection

    2020  Volume 106, Issue 3, Page(s) 577–584

    Keywords Microbiology (medical) ; Infectious Diseases ; General Medicine ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 779366-2
    ISSN 1532-2939 ; 0195-6701
    ISSN (online) 1532-2939
    ISSN 0195-6701
    DOI 10.1016/j.jhin.2020.08.025
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Decontamination of face masks and filtering facepiece respirators via ultraviolet germicidal irradiation, hydrogen peroxide vaporisation, and use of dry heat inactivates an infectious SARS-CoV-2 surrogate virus.

    Ludwig-Begall, L. F. / Wielick, C. / Dams, L. / Nauwynck, H. / Demeuldre, P.-F. / Napp, A. / Laperre, J. / Haubruge, E. / Thiry, E.

    Abstract: Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering ... ...

    Abstract Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering facepiece respirators has been recommended; prior decontamination is paramount to their re-use. Aim: We aim to provide information on the effects of three decontamination procedures on porcine respiratory coronavirus (PRCV)-contaminated masks and respirators, presenting a stable model for infectious coronavirus decontamination of these typically single-use-only products. Methods: Surgical masks and filtering facepiece respirator coupons and straps were inoculated with infectious PRCV and submitted to three decontamination treatments, UV irradiation, H2O2 vaporisation, and dry heat treatment. Viruses were recovered from sample materials and viral titres were measured in swine testicle cells. Findings: UV irradiation, H2O2 vaporisation and dry heat reduced infectious PRCV by more than three orders of magnitude on mask and respirator coupons and rendered it undetectable in all decontamination assays. Conclusion: This is the first description of stable disinfection of face masks and filtering facepiece respirators contaminated with an infectious SARS-CoV-2 surrogate using UV irradiation, H2O2 vaporisation and dry heat treatment. The three methods permit demonstration of a loss of infectivity by more than three orders of magnitude of an infectious coronavirus in line with the FDA policy regarding face masks and respirators. It presents advantages of uncomplicated manipulation and utilisation in a BSL2 facility, therefore being easily adaptable to other respirator and mask types.
    Keywords covid19
    Publisher MedRxiv; WHO
    Document type Article ; Online
    DOI 10.1101/2020.06.02.20119834
    Database COVID19

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  8. Article: The use of germicidal ultraviolet light, vaporized hydrogen peroxide and dry heat to decontaminate face masks and filtering respirators contaminated with a SARS-CoV-2 surrogate virus

    Ludwig-Begall, L F / Wielick, C / Dams, L / Nauwynck, H / Demeuldre, P-F / Napp, A / Laperre, J / Haubruge, E / Thiry, E

    J Hosp Infect

    Abstract: BACKGROUND: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering ... ...

    Abstract BACKGROUND: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering facepiece respirators has been recommended; prior decontamination is paramount to their re-use. AIM: We aim to provide information on the effects of three decontamination procedures on porcine respiratory coronavirus (PRCV)-contaminated masks and respirators, presenting a stable model for infectious coronavirus decontamination of these typically single-use-only products. METHODS: Surgical masks and filtering facepiece respirator coupons and straps were inoculated with infectious PRCV and submitted to three decontamination treatments, ultraviolet (UV) irradiation, vaporized H2O2, and dry heat treatment. Viruses were recovered from sample materials and viral titres were measured in swine testicle cells. FINDINGS: UV irradiation, vaporized H2O2 and dry heat reduced infectious PRCV by more than three orders of magnitude on mask and respirator coupons and rendered it undetectable in all decontamination assays. CONCLUSION: This is the first description of stable disinfection of face masks and filtering facepiece respirators contaminated with an infectious SARS-CoV-2 surrogate using UV irradiation, vaporized H2O2 and dry heat treatment. The three methods permit demonstration of a loss of infectivity by more than three orders of magnitude of an infectious coronavirus in line with the United States Food and Drug Administration policy regarding face masks and respirators. It presents advantages of uncomplicated manipulation and utilization in a BSL2 facility, therefore being easily adaptable to other respirator and mask types.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #809252
    Database COVID19

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  9. Article ; Online: The use of germicidal ultraviolet light, vaporised hydrogen peroxide and dry heat to decontaminate face masks and filtering respirators contaminated with an infectious norovirus.

    Wielick, Constance / Ludwig-Begall, Louisa F / Dams, Lorène / Razafimahefa, Ravo M / Demeuldre, Pierre-Francois / Napp, Aurore / Laperre, Jan / Jolois, Olivier / Farnir, Frédéric / Haubruge, Eric / Thiry, Etienne

    Infection prevention in practice

    2020  Volume 3, Issue 1, Page(s) 100111

    Abstract: In the context of the SARS-CoV-2 pandemic, reuse of surgical masks and filtering facepiece respirators has been recommended. Their reuse necessitates procedures to inactivate contaminating human respiratory and oral pathogens. We previously demonstrated ... ...

    Abstract In the context of the SARS-CoV-2 pandemic, reuse of surgical masks and filtering facepiece respirators has been recommended. Their reuse necessitates procedures to inactivate contaminating human respiratory and oral pathogens. We previously demonstrated decontamination of masks and respirators contaminated with an infectious SARS-CoV-2 surrogate via ultraviolet germicidal irradiation, vaporised hydrogen peroxide, and use of dry heat. Here, we show that these same methods efficiently inactivate a more resistant, non-enveloped oral virus; decontamination of infectious murine norovirus-contaminated masks and respirators reduced viral titres by over four orders of magnitude on mask or respirator coupons.
    Language English
    Publishing date 2020-12-28
    Document type Journal Article
    ISSN 2590-0889
    ISSN (online) 2590-0889
    DOI 10.1016/j.infpip.2020.100111
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Decontamination of face masks and filtering facepiece respirators via ultraviolet germicidal irradiation, hydrogen peroxide vaporisation, and use of dry heat inactivates an infectious SARS-CoV-2 surrogate virus.

    Ludwig-Begall, Louisa F / Wielick, Constance / Dams, Lorene / Nauwynck, Hans / Demeuldre, Pierre-Francois / Napp, Aurore / Laperre, Jan / Haubruge, Eric / Thiry, Etienne

    medRxiv

    Abstract: Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering ... ...

    Abstract Background: In the context of the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, the supply of personal protective equipment remains under severe strain. To address this issue, re-use of surgical face masks and filtering facepiece respirators has been recommended; prior decontamination is paramount to their re-use. Aim: We aim to provide information on the effects of three decontamination procedures on porcine respiratory coronavirus (PRCV)-contaminated masks and respirators, presenting a stable model for infectious coronavirus decontamination of these typically single-use-only products. Methods: Surgical masks and filtering facepiece respirator coupons and straps were inoculated with infectious PRCV and submitted to three decontamination treatments, UV irradiation, H2O2 vaporisation, and dry heat treatment. Viruses were recovered from sample materials and viral titres were measured in swine testicle cells. Findings: UV irradiation, H2O2 vaporisation and dry heat reduced infectious PRCV by more than three orders of magnitude on mask and respirator coupons and rendered it undetectable in all decontamination assays. Conclusion: This is the first description of stable disinfection of face masks and filtering facepiece respirators contaminated with an infectious SARS-CoV-2 surrogate using UV irradiation, H2O2 vaporisation and dry heat treatment. The three methods permit demonstration of a loss of infectivity by more than three orders of magnitude of an infectious coronavirus in line with the FDA policy regarding face masks and respirators. It presents advantages of uncomplicated manipulation and utilisation in a BSL2 facility, therefore being easily adaptable to other respirator and mask types.
    Keywords covid19
    Language English
    Publishing date 2020-06-05
    Publisher Cold Spring Harbor Laboratory Press
    Document type Article ; Online
    DOI 10.1101/2020.06.02.20119834
    Database COVID19

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