Epidemiology and drug susceptibility of nontuberculous mycobacteria (NTM) in Italy in 2016-2020



Introduction. Nontuberculous mycobacteria (NTM) are environmental mycobacteria which may cause pulmonary and extrapulmonary diseases. These organisms are difficult to treat due to their intrinsic drug-resistance. In Italy, no major nationwide study on NTM epidemiology and drug susceptibility was performed.
Methods. Data on the epidemiology of 7,469 NTM clinical isolates identified in Italy in 2016-2020 and on the minimum inhibitory concentrations (MICs) of 1,506 of these strains were analysed.
Results. Overall, 63 species were identified in 42 hospital laboratories located in 16 out of 20 regions, with Mycobacterium avium complex (MAC) being the most frequently isolated, followed by M. gordonae, M. xenopi, M. abscessus. The MICs of 12 drugs for MAC, M. xenopi, M. kansasii, M. abscessus, M. fortuitum and M. chelonae were interpreted for clinical significance (susceptible, intermediate, resistant) based on the guidelines published by the Clinical and Laboratory Standards Institute in November 2018.
Conclusions. Our data are in line with other nationwide studies and may be of value for further update of microbiological and clinical guidelines.

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Federico Giannoni - Istituto Superiore di Sanità https://orcid.org/0000-0001-5521-512X

Alessio Lanni - Istituto Superiore di Sanità https://orcid.org/0000-0002-6544-4046

Angelo Iacobino - Istituto Superiore di Sanità https://orcid.org/0000-0002-0176-3662

Lanfranco Fattorini - Istituto Superiore di Sanità https://orcid.org/0000-0003-1673-1804

Italian Multicentre Study on Nontuberculous Mycobacteria (SMI-NTM)

How to Cite
Giannoni, F., Lanni, A., Iacobino, A., Fattorini, L., & Italian Multicentre Study on Nontuberculous Mycobacteria (SMI-NTM). (2023). Epidemiology and drug susceptibility of nontuberculous mycobacteria (NTM) in Italy in 2016-2020. Annali dell’Istituto Superiore Di Sanità, 59(2), 132–138. https://doi.org/10.4415/ANN_23_02_06
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