The study identified several genetic mutations associated with drug resistance in Mycobacterium tuberculosis strains from Russia, including mutations in rpoB, katG, embB, pncA, rrs, rpsL, ethA, ndhA, Rv0194, Rv1634, and Rv2688c, which confer resistance to rifampicin, isoniazid, ethambutol, pyrazinamide, kanamycin, amikacin, streptomycin, ethionamide, and fluoroquinolone.