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October-2024 Volume 21 Issue 4

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Case Report Open Access

Severe community‑acquired pneumonia caused by Legionella gormanii in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report

  • Authors:
    • Sujuan Li
    • Yuanhang Zhang
    • Dongsheng Han
  • View Affiliations / Copyright

    Affiliations: Department of Clinical Laboratory, Hangzhou Traditional Chinese Medicine Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310005, P.R. China, Department of Laboratory Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310003, P.R. China
    Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 145
    |
    Published online on: August 12, 2024
       https://doi.org/10.3892/br.2024.1833
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Abstract

Legionella pneumonia is an atypical form of pneumonia caused by Legionella gormanii that can also lead to multiple organ diseases, including acute respiratory distress syndrome and multiple organ dysfunction syndrome. Legionella gormanii requires a long incubation period for culture in clinical practice using BCYE medium. The specificity of serum for serological detection is low, resulting in a relatively high rate of missed Legionella diagnoses. Contracting the H1N1 virus can lead to the misdiagnosis of Legionella gormanii. Metagenomic next‑generation sequencing (mNGS) is a novel tool that can rapidly and accurately identify potential Legionella gormanii strains. A severe case of community‑acquired pneumonia in a 79‑year‑old patient was reported. The patient was diagnosed with Legionella gormanii and influenza A subtype (H1N1) virus using mNGS at The First Affiliated Hospital, Zhejiang University School of Medicine. After anti‑Legionella and antiviral therapy, the number of reads identifying Legionella gormanii in bronchoalveolar lavage fluid using mNGS decreased from 665 to 112 as the patient's condition gradually improved. A search of PubMed revealed few reports of Legionella gormanii in association with the influenza A subtype (H1N1) virus. Patients with severe pneumonia caused by Legionella and influenza A subtype H1N1 virus infections should be screened early for infections using methods such as mNGS. This approach enables early and precise treatment, simplifying the administration of antibiotics and enhancing patient outcomes.
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Copy and paste a formatted citation
Spandidos Publications style
Li S, Zhang Y and Han D: Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report. Biomed Rep 21: 145, 2024.
APA
Li, S., Zhang, Y., & Han, D. (2024). Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report. Biomedical Reports, 21, 145. https://doi.org/10.3892/br.2024.1833
MLA
Li, S., Zhang, Y., Han, D."Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report". Biomedical Reports 21.4 (2024): 145.
Chicago
Li, S., Zhang, Y., Han, D."Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report". Biomedical Reports 21, no. 4 (2024): 145. https://doi.org/10.3892/br.2024.1833
Copy and paste a formatted citation
x
Spandidos Publications style
Li S, Zhang Y and Han D: Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report. Biomed Rep 21: 145, 2024.
APA
Li, S., Zhang, Y., & Han, D. (2024). Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report. Biomedical Reports, 21, 145. https://doi.org/10.3892/br.2024.1833
MLA
Li, S., Zhang, Y., Han, D."Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report". Biomedical Reports 21.4 (2024): 145.
Chicago
Li, S., Zhang, Y., Han, D."Severe community‑acquired pneumonia caused by <em>Legionella gormanii </em>in combination with influenza A subtype (H1N1) virus in an immunocompetent patient detected by metagenomic next‑generation sequencing: A case report". Biomedical Reports 21, no. 4 (2024): 145. https://doi.org/10.3892/br.2024.1833
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