Distribution of non-tuberculous Mycobacterium species in Lishui City from 2019 to 2022
Objective This paper aims to analyze the distribution of non-tuberculous Mycobacterium(NTM)in Lishui City,so as to provide basis for scientific prevention and control strategy of NTM disease in Lishui City.Methods The liquid-cul-tured positive strains that were negative in Mycobacterium tuberculosis antigen test in Lishui City from 2019 to 2022 were identi-fied by gene microarray method.The isolation rate and the distribution of NTM from 2019 to 2022 were analyzed.Results The detection rate of NTM was stable from 2019 to 2022,and there was no statistical significance on the difference between different years(x2tendency=0.765,P=0.382).Eleven common strains were isolated,and the top three were Mycobacterium intracellular(58.24％),Mycobacterium avium(17.65％),and Mycobacterium turtle/abscess(7.06％).There was statistical significance on the detection rate of NTM between genders(x2=23.004,P＜0.001),and the detection rate of NTM in males(9.39％)was lower than that in females(18.59％).There was statistical significance on the differences in the detection rate of NTM among different age groups(x2=47.698,P＜0.001),and the infected patients were mainly the middle-aged and elderly peo-ple over 51 years old(88.82％).Conclusion The isolation rate of NTM in Lishui City was stable from 2019 to 2022.The top three strains are Mycobacterium intracellulare,Mycobacterium avium,Mycobacterium chelonis/abscess,and the infected popula-tion is mainly female,middle-aged and elderly.
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