• Shi Chen, Zehu Liu, and Xiujiao Xia.
• Department of Clinical Laboratory.
• Medicine (Baltimore). 2022 Dec 9; 101 (49): e32220e32220.

IntroductionNontuberculous mycobacteria (NTM), are natural inhabitants of natural waters, engineered water systems, and soils. As a consequence of their ubiquitous distribution, humans are surrounded by these opportunistic pathogens.Patient ConcernsIn this report, we describe a case of scubcutaneous Mycobacterium marinum infection associated with home tropical ornamental fish aquaria. A 43-years-old man reported progressively increasing nodules over his left forearm and hand for more than 7 months.DiagnosisBased on NTM culture, pathological examination, identification by gene sequencing and matrix assisted laser desorption ionization time of flight mass spectrometry, the diagnosis of scubcutaneous NTM infection was confirmed.InterventionsThe patient was treated with itraconazole for suspected sporotrichosis over 1 month.OutcomesThe patient was treated with oral doxycycline hydrochloride capsules (200 mg/day) for 5 months, the nodules had resolved.ConclusionHome aquarium environments may serve as a possible source of mycobacteria infection in urban family.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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