Mycobacterium szulgai: A Rare Cause of Non-Tuberculous Mycobacteria Disseminated Infection

Ana Luisa Nunes, Ana Coimbra, Ruben Carvalho, Carolina Figueiredo, Vania Almeida, Jandira Lima, Rui M. Santos

Abstract


Mycobacterium szulgai (MS) is a rare and slow-growing type of non-tuberculous mycobacteria (NTM), with a human isolation prevalence of less than 0.2% of all NTM cases. MS may cause pulmonary infection, extra-pulmonary localized disease involving the skin, lymph nodes, bone, synovial tissue or kidneys and disseminated infection, when two or more organs are affected. When disseminated infection is present, the patients usually have an underlying immunosuppressive condition. The authors report the case of a 25-year-old patient with systemic lupus erythematosus, presenting with recurrent fever, non-productive coughing, weight loss and asthenia, as well as two violaceous plaques with superficial ulceration in the gluteal region. MS was isolated from the bronchial lavage and skin biopsy cultures, confirming the rare disseminated form of MS infection. After 10 months of follow-up on isoniazid, rifampin, ethambutol and pyrazinamide, no signs of relapse were evident. To date, only 16 other cases of MS disseminated disease have been reported.




J Med Cases. 2022;13(2):61-65
doi: https://doi.org/10.14740/jmc3885

Keywords


Mycobacterium szulgai; Disseminated infection; Non-tuberculous mycobacteria; Cutaneous infection

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