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Xia T, Shi S, Yang J, Sun D, Suo J, Kuang H, Sun N, Hu H, Xiao J, Yan Z. Contamination dynamics of personal protective equipment (PPE) by SARS-CoV-2 RNA in a makeshift hospital with COVID-19 positive occupants. Infect Prev Pract 2023; 5:100309. [PMID: 37744681 PMCID: PMC10514403 DOI: 10.1016/j.infpip.2023.100309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 08/23/2023] [Indexed: 09/26/2023] Open
Abstract
Background Personal protective equipment (PPE) helps protect healthcare workers (HCWs) from infection and prevents cross-contamination. Knowledge of the contamination dynamics of PPE during the management of COVID-19 patients in a makeshift hospital is limited. Aim To describe the rate of SARS-CoV-2 contamination in PPE and to assess the change of contamination at different time points. Methods HCWs were followed up for up to 4 hours with hourly collection of swab samples from PPE surfaces in a makeshift COVID-19 hospital setting. Swabs were tested using quantitative reverse transcription polymerase chain reaction (RT-qPCR) for SARS-CoV-2 RNA. Results SARS-CoV-2 was detected on 50.9% of the 1620 swabbed samples from 9 different sites of full-body PPE worn by HCWs. The proportion of sites contaminated with SARS-CoV-2 RNA varied from 10.6% to 95.6%. Viral RNA was most frequently detected from the sole of the outer foot cover (95.6%) and least frequently on the face shield (10.6%). The median Ct values among positive samples were 34.20 (IQR, 32.61-35.22) and 34.05 (IQR, 32.20-35.39) for ORF1ab and N genes, respectively. The highest rate of contamination with SARS-CoV-2 RNA for the PPE swab samples was found after 3 hours of use. The positive rate of outer surface of HEPA filters from air supply device was 82.1% during the full capacity period of the makeshift hospital. Conclusion A higher rate of contamination was identified at 3 hours after the entrance to the COVID-19 patient care area. Virus-containing aerosols were trapped in the HEPA filter of air supply equipment, representing a potential protective factor against infection to HCWs.
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Affiliation(s)
- Tingting Xia
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Shi Shi
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Jinyan Yang
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Dan Sun
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Jijiang Suo
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Huihui Kuang
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Nana Sun
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Hongyan Hu
- Department of Laboratory Medicine, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Jinhan Xiao
- Department of Rehabilitation Physiotherapy, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
| | - Zhongqiang Yan
- Department of Disease Prevention and Control, Hainan Hospital of Chinese PLA General Hospital, Sanya, Hainan, People's Republic of China
- Department of Disease Prevention and Control, The Second Medical Center of Chinese PLA General Hospital, Beijing, People's Republic of China
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Karami H, Karimi Z, Karami N. SARS-CoV-2 in brief: from virus to prevention. Osong Public Health Res Perspect 2022; 13:394-406. [PMID: 36617546 DOI: 10.24171/j.phrp.2022.0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 10/11/2022] [Indexed: 11/29/2022] Open
Abstract
The recent outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), ahighly transmissible virus with a likely animal origin, has posed major and unprecedentedchallenges to millions of lives across the affected nations of the world. This outbreak firstoccurred in China, and despite massive regional and global attempts shortly thereafter, itspread to other countries and caused millions of deaths worldwide. This review presents keyinformation about the characteristics of SARS-CoV-2 and its associated disease (namely,coronavirus disease 2019) and briefly discusses the origin of the virus. Herein, we also brieflysummarize the strategies used against viral spread and transmission.
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Affiliation(s)
- Hassan Karami
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Zeinab Karimi
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Negin Karami
- Department of Nursing, School of Nursing, Alborz University of Medical Sciences, Karaj, Iran
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Henriques TM, Rito B, Proença DN, Morais PV. Application of an Ultrasonic Nebulizer Closet in the Disinfection of Textiles and Footwear. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:10472. [PMID: 36078188 PMCID: PMC9518335 DOI: 10.3390/ijerph191710472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
The emergence of the coronavirus disease 2019 (COVID-19) pandemic highlighted the importance of disinfection processes in health safety. Textiles and footwear have been identified as vectors for spreading infections. Therefore, their disinfection can be crucial to controlling pathogens' dissemination. The present work aimed to evaluate the effectiveness of a commercial disinfectant aerosolized by an ultrasonic nebulizer closet as an effective method for disinfecting textiles and footwear. The disinfection was evaluated in three steps: suspension tests; nebulization in a 0.08 m3 closet; nebulization in the upscaled 0.58 m3 closet. The disinfection process of textiles and footwear was followed by the use of bacteriophages, bacterial spores, and bacterial cells. The disinfection in the 0.58 m3 closet was efficient for textiles (4 log reduction) when bacteriophage Lambda, Pseudomonas aeruginosa, and Bacillus subtilis were used. The footwear disinfection was achieved (4 log reduction) in the 0.08 m3 closet for Escherichia coli and Staphylococcus aureus. Disinfection in an ultrasonic nebulization closet has advantages such as being quick, not wetting, being efficient on porous surfaces, and is performed at room temperature. Ultrasonic nebulization disinfection in a closet proves to be useful in clothing and footwear stores to prevent pathogen transmission by the items' widespread handling.
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Affiliation(s)
- Tiago M. Henriques
- UCCCB—University of Coimbra Bacteria Culture Collection, Department of Life Science, University of Coimbra, 3000-456 Coimbra, Portugal
- IATV—Instituto do Ambiente Tecnologia e Vida, 3030-790 Coimbra, Portugal
| | - Beatriz Rito
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, 3000-456 Coimbra, Portugal
| | - Diogo N. Proença
- UCCCB—University of Coimbra Bacteria Culture Collection, Department of Life Science, University of Coimbra, 3000-456 Coimbra, Portugal
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, 3000-456 Coimbra, Portugal
| | - Paula V. Morais
- UCCCB—University of Coimbra Bacteria Culture Collection, Department of Life Science, University of Coimbra, 3000-456 Coimbra, Portugal
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, 3000-456 Coimbra, Portugal
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Jung J, Song KH, Jeong H, Ham SY, Kim ES, Kim HB. Are coveralls required as personal protective equipment during the management of COVID-19 patients? Antimicrob Resist Infect Control 2021; 10:164. [PMID: 34838123 PMCID: PMC8626720 DOI: 10.1186/s13756-021-01017-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 10/01/2021] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVES Few studies have investigated the contamination of personal protective equipment (PPE) during the management of patients with severe-to-critical coronavirus disease (COVID-19). This study aimed to determine the necessity of coveralls and foot covers for body protection during the management of COVID-19 patients. METHODS PPE samples were collected from the coveralls of physicians exiting a room after the management of a patient with severe-to-critical COVID-19 within 14 days after the patient's symptom onset. The surface of coveralls was categorized into coverall-only parts (frontal surface of the head, anterior neck, dorsal surface of the foot cover, and back and hip) and gown-covered parts (the anterior side of the forearm and the abdomen). Sampling of the high-contact surfaces in the patient's environment was performed. We attempted to identify significant differences in contamination with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) between the coverall-only and gown-covered parts. RESULTS A total of 105 swabs from PPEs and 28 swabs from patient rooms were collected. Of the PPE swabs, only three (2.8%) swabs from the gown-covered parts were contaminated with SARS-CoV-2. However, 23 of the 28 sites (82.1%) from patient rooms were contaminated. There was a significant difference in the contamination of PPE between the coverall-only and gown-covered parts (0.0 vs 10.0%, p = 0.022). CONCLUSIONS Coverall contamination rarely occurred while managing severe-to-critical COVID-19 patients housed in negative pressure rooms in the early stages of the illness. Long-sleeved gowns may be used in the management of COVID-19 patients.
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Affiliation(s)
- Jongtak Jung
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Kyoung-Ho Song
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea.
| | - Hyeonju Jeong
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea.,Ansung Hospital, Gyeonggi Provincial Medical Center, Ansung, Gyeonggi-do, Republic of Korea
| | - Sin Young Ham
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea.,Department of Internal Medicine, Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Eu Suk Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea
| | - Hong Bin Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 82, Gumi-ro173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, 13620, Republic of Korea
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