Fig. (1) A representative gel of 16S ribosomal DNA amplicons from 9 NTM isolates. M is the molecular weight marker; lanes 1 to 8 show positive NTM rRNA gene amplicons, and lane 9 showed no amplification of the NTM rRNA gene. The expected PCR band for the 5¢-end of the 16S rRNA was approximately 460 bp.