• 1. Department of Pulmonary and Critical Care Medicine, Ningde Municipal Hospital of Ningde Normal University, Educational Hospital of Fujian Medical University, Ningde, Fujian 352100, P. R. China;
  • 2. Respiratory Intensive Care Unit, Ningde Municipal Hospital of Ningde Normal University, Educational Hospital of Fujian Medical University, Ningde, Fujian 352100, P. R. China;
  • 3. Department of Pulmonary and Critical Care Medicine, People's Hospital of Peking University, Beijing 100044, P. R. China;
  • 4. Clinical Laboratory, Ningde Municipal Hospital of Ningde Normal University, Educational Hospital of Fujian Medical University, Ningde, Fujian 352100, P. R. China;
XUE Qing, Email: surky@163.com; JIAO Weike, Email: surky@163.com
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Objective To analyze the clinical features of Legionella-associated cavitary pneumonia, and to explore the diagnosis, treatment planning, and clinical management of patients.Methods The data of a patient with severe Legionella-associated cavitary pneumonia were collected and analyzed. Databases including PubMed, Ovid, Wanfang, VIP and Chinese National Knowledge Infrastructure were searched for pertinent literatures, using the keyword "Legionella, lung abscess or cavitary pneumonia" in Chinese and English from Jan. 1990 to Jun. 2019. The related literature was reviewed.Results A 60-year-old male patient was admitted to hospital because of fever, cough, and expectoration for five days. On presentation, his temperature was 38.3 °C, and pulmonary auscultation revealed rales on the left side of the lungs. Culture of lower airway secretions obtained by bronchoscopy revealed Legionella pneumophila infection, and serotype 6. Chest computerized tomography showed a consolidation in the left lung and an abscess in the left upper lobe. The patient was discharged from the hospital after three months of anti-Legionella treatment (Mosfloxacin, Azithromycin, etc.). Fifteen manuscripts, including 18 cases, were retrieved from databases. With the addition of our case, a total of 19 cases were analyzed in detail. There were 15 males and four females, aged from 4 months to 73 years old. Most of them (14/19, 73.7%) were accompanied by multiple underlying diseases. Initial empiric antimicrobial therapy failed in 15 (78.9%) cases, and 7 (36.8%) patients required combination therapy. The courses of antimicrobial treatment were from 3 to 49 weeks. All except one patient were fully recovered and discharged from hospital.Conclusions Legionella pneumonia with pulmonary abscess or cavity is rare and often presents with fever. Pulmonary imaging shows infiltration in the initial, but can be free of cavities or abscesses. Most patients have basic diseases. Severe patients often need to be treated in combination with antibiotics for long periods of time.

Citation: WU Jianhui, ZHANG Canhui, PENG Zhiwen, ZHENG Yali, LAI Zibiao, DENG Xinyu, PENG Yunjuan, GAO Zhancheng, XUE Qing, JIAO Weike. Severe cavitary pneumonia caused by Legionella pneumophila serotype 6: a case report and literature review. Chinese Journal of Respiratory and Critical Care Medicine, 2021, 20(2): 106-113. doi: 10.7507/1671-6205.201908010 Copy

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