AUTHOR=Lin Yi , Jiang Zhao-Zhao , Chi Xiao-Qian , Chen Jian-Sheng , Wen Chao , Zhang Chao , Wang Ying-Ying , Xie Guang-Liang TITLE=Severe pneumonia caused by Nocardia otitidiscaviarum in a patient with bronchiectasis and IgA nephropathy: a case report JOURNAL=Frontiers in Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1496814 DOI=10.3389/fmed.2025.1496814 ISSN=2296-858X