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. 2023 Feb 28:16:309-315.
doi: 10.2147/RMHP.S398668. eCollection 2023.

Nosocomial Omicron Outbreak in a Medical Ward During the Coronavirus Disease 2019 Pandemic

Tsung-Lung Lu  1 , Yiling Chuang  1 , Chienhsiu Huang  2
Affiliations

Nosocomial Omicron Outbreak in a Medical Ward During the Coronavirus Disease 2019 Pandemic

Tsung-Lung Lu et al. Risk Manag Healthc Policy. .

Abstract

Background: The Omicron variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is 2 to 3 times more contagious than the Delta variant and poses a new challenge in containing transmission in community and health care settings. Transmission in hospitals can cause nosocomial outbreak infections and affect patients and health care workers. This study describes a coronavirus disease 2019 (COVID-19) outbreak in a medical ward. The purpose of the investigation was to determine the transmission source of the outbreak, as well as the measures implemented to prevent and control it.

Methods: A cluster of SARS-CoV-2 infections that affected health care workers, inpatients, and caregivers was thoroughly researched in a medical ward. There were several strict outbreak measures implemented in our hospital, and these measures controlled the nosocomial COVID-19 outbreak in this study.

Results: Seven cases of SARS-CoV-2 infection were diagnosed within 2 days in the medical ward. The infection control team declared a nosocomial outbreak of the COVID-19 Omicron variant. Several strict outbreak measures were implemented as follows: 1. The medical ward was closed and cleaning and disinfection were performed. 2. All patients and caregivers with negative test results were transferred to a spare COVID-19 isolation ward. 3. Relatives' visits were not allowed, and no new patient was admitted during the outbreak period. 4. Health care workers were retrained on wearing personal protective equipment and enhanced techniques and practices of hand hygiene, social distancing, and self-monitoring of fever and respiratory symptoms.

Conclusion: This outbreak occurred in a non-COVID-19 ward during the COVID-19 Omicron variant phase of the pandemic. Our strict outbreak measures halted and contained the nosocomial COVID-19 outbreak in 10 days. Future studies are needed to establish a standard policy of COVID-19 outbreak measure implementation.

Keywords: COVID-19; Omicron variant; SARS-CoV-2; medical ward; nosocomial outbreak.

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Conflict of interest statement

The authors declare that they have no competing interests in this work.

Figures

Figure 1
Figure 1
The floor plan of the COVID-19 isolation ward.
See this image and copyright information in PMC

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References

    1. World Health Organization. WHO Coronavirus (COVID-19) dashboard; 2022. Available from: https://covid19.who.int/table. Accessed October 30, 2022.
    1. Wolter N, Jassat W, Walaza S, et al. Clinical severity of SARS-CoV-2 Omicron BA.4 and BA.5 lineages compared to BA.1 and Delta in South Africa. Nat Commun. 2022;13:5860. doi:10.1038/s41467-022-33614-0 - DOI - PMC - PubMed
    1. Shiehzadegan S, Alaghemand N, Fox M, Venketaraman V. Analysis of the Delta Variant B.1.617.2 COVID-19. Clin Pract. 2021;11:778–784. doi:10.3390/clinpract11040093 - DOI - PMC - PubMed
    1. Qu P, Evans JP, Faraone J, et al. Distinct neutralizing antibody escape of SARS-CoV-2 Omicron subvariants BQ.1, BQ.1.1, BA.4.6, BF.7 and BA.2.75.2. bioRxiv. 2022. doi:10.1101/2022.10.19.512891 - DOI - PubMed
    1. Taiwan Centers for Disease Control. Starting today, CECC to adjust management measures for visitors, caregivers, and healthcare personnel in hospitals in response to new confirmed domestic Omicron cases; 2022. Available from: https://www.cdc.gov.tw/En/Category/ListContent/tov1jahKUv8RGSbvmzLwFg?ua.... Accessed November 13, 2022.