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Infect Control Hosp Epidemiol ; 43(6): 764-769, 2022 06.
Article in English | MEDLINE | ID: covidwho-1890039


OBJECTIVE: To assess the potential for contamination of personnel, patients, and the environment during use of contaminated N95 respirators and to compare the effectiveness of interventions to reduce contamination. DESIGN: Simulation study of patient care interactions using N95 respirators contaminated with a higher and lower inocula of the benign virus bacteriophage MS2. METHODS: In total, 12 healthcare personnel performed 3 standardized examinations of mannequins including (1) control with suboptimal respirator handling technique, (2) improved technique with glove change after each N95 contact, and (3) control with 1-minute ultraviolet-C light (UV-C) treatment prior to donning. The order of the examinations was randomized within each subject. The frequencies of contamination were compared among groups. Observations and simulations with fluorescent lotion were used to assess routes of transfer leading to contamination. RESULTS: With suboptimal respirator handling technique, bacteriophage MS2 was frequently transferred to the participants, mannequin, and environmental surfaces and fomites. Improved technique resulted in significantly reduced transfer of MS2 in the higher inoculum simulations (P < .01), whereas UV-C treatment reduced transfer in both the higher- and lower-inoculum simulations (P < .01). Observations and simulations with fluorescent lotion demonstrated multiple potential routes of transfer to participants, mannequin, and surfaces, including both direct contact with the contaminated respirator and indirect contact via contaminated gloves. CONCLUSION: Reuse of contaminated N95 respirators can result in contamination of personnel and the environment even when correct technique is used. Decontamination technologies, such as UV-C, could reduce the risk for transmission.

COVID-19 , N95 Respirators , Decontamination/methods , Equipment Reuse , Fomites , Humans , Levivirus , SARS-CoV-2
Infect Control Hosp Epidemiol ; 42(2): 215-217, 2021 02.
Article in English | MEDLINE | ID: covidwho-1083571


On coronavirus disease 2019 (COVID-19) wards, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleic acid was frequently detected on high-touch surfaces, floors, and socks inside patient rooms. Contamination of floors and shoes was common outside patient rooms on the COVID-19 wards but decreased after improvements in floor cleaning and disinfection were implemented.

COVID-19/transmission , Environmental Pollution/analysis , Intensive Care Units , Patients' Rooms , SARS-CoV-2/isolation & purification , COVID-19/virology , Clothing , Disinfection/methods , Equipment Contamination , Hospitals, Veterans , Humans , Ohio , Real-Time Polymerase Chain Reaction
Am J Infect Control ; 49(3): 392-395, 2021 03.
Article in English | MEDLINE | ID: covidwho-710643


In our facility, 25% of personnel with coronavirus disease 2019 (COVID-19) had a higher-risk exposure to an infected patient or co-worker and 14% reported a higher-risk exposure in the community. All higher-risk exposures to infected patients occurred on non-COVID-19 units, often when there was a delay in diagnosis because COVID-19 was not initially suspected. Higher-risk exposures to co-workers with COVID-19 often involved lapses in compliance with masking in nonpatient care areas such as nursing stations and staff work or break rooms.

COVID-19/transmission , Health Personnel/statistics & numerical data , Infection Control/statistics & numerical data , Infectious Disease Transmission, Patient-to-Professional/statistics & numerical data , Occupational Exposure/statistics & numerical data , Humans , SARS-CoV-2