• 1. Department of Respiratory and Critical Care Medicine, Gulou Clinical Medical College, Nanjing Medical University, Nanjing, Jiangsu 210008, P. R. China;
  • 2. Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, Nanjing, Jiangsu 210008, P. R. China;
  • 3. Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Nanjing, Jiangsu 210008, P. R. China;
QIU Yuying, Email: qiuyuying1402@sina.com
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Objective To improve the understanding of psittacosis, the clinical data of 8 cases are reviewed. The application of pathogen metagenomics next-generation sequencing (mNGS) in the diagnosis of nocardiosis is also investigated.Methods The clinical data of eight patients with psittacosis diagnosed by mNGS in Nanjing Drum Tower Hospital from January 2018 to May 2020 were reviewed. The clinical characteristics, laboratory examination characteristics and imaging changes were analyzed, and the treatment outcome was followed-up.Results Among the eight cases, there were six males and two females, aged 43~83 years old, with an average age of 64±12 years old. Six of them had a clear history of poultry exposure. The major clinical manifestations were fever, cough, dyspnea, etc. Chest high-resolution computed tomography (HRCT) may have solid shadow, ground glass like shadow. Chlamydia psittaci was detected by mNGS in eight patients’ bronchoalveolar lavage fluid. Minocycline or moxifloxacin were administrated, six patients were discharged after their condition improved, and two patients died.Conclusions The incidence of psittacosis is low, and its clinical manifestations lack specificity. In the course of the disease, there may be different degrees of fever, cough, sputum, dyspnea and other symptoms. The lungs can be heard with wet rales, chest HRCT can be seen ground glass shadow, consolidation shadow, accompanied by air bronchogram. Chlamydia psittaci can be detected in alveolar lavage fluid by mNGS. The patients need to be treated for a long time, lasting at least 10 to 14 days. Tetracycline drugs should be the first choice, and can be combined with other antibiotics with activity against gram-positive and gram-negative bacteria in critical patients.

Citation: WANG Yanhong, QIU Yuying, TANG Jian, ZHU Zhanghua, LIU Ning, YU Zhuxi, LI Yan, TONG Jingzhi. Application of metagenomic next-generation sequencing in diagnosis of Psittacosis: a report of eight cases. Chinese Journal of Respiratory and Critical Care Medicine, 2021, 20(7): 472-478. doi: 10.7507/1671-6205.202008070 Copy

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