AUTHOR=Liu Chunping , Hao Jiahao , Song Minghui , Ye Jiaqing , Zheng Cuiying , Huang Yinqi , Feng Zhongjun , Jiang Ruiping , Shi Yan , Gao Weili , Zuo Huifen , Zhao Zhenjun , Zhang Lijie TITLE=Mycobacterium marinum hand infection: a case report and literature review JOURNAL=Frontiers in Medicine VOLUME=Volume 11 - 2024 YEAR=2024 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2024.1433153 DOI=10.3389/fmed.2024.1433153 ISSN=2296-858X ABSTRACT=Mycobacterium marinum, a photochromogenic, slow-growing mycobacterium, thrives in both marine and freshwater environments. Optimal growth occurs between 25 °C and 35 °C, with survival becoming challenging above 37 °C. Typically, M. marinum enters the body via skin abrasions, often leading to infections of the upper extremities.Diagnosis of M. marinum infection is frequently challenging and delayed due to the difficult pathogen identification. At present, a standardized treatment protocol has yet to be established. Presented herein is a case study detailing an infection of the right hand's middle finger caused by M. marinum. Notably, his occupation as a chef, handling fish and seafood post-injury, was a significant factor. Histological