Mycobacteria quantification in environmental samples and comparison to reference methods. A) Quantification in drinking water samples (n = 90) was performed by culture method (Method A: Le Dantec et al. 2002) , and the new real-time PCR targeting the atpE gene (locus Rv1305 in M. tuberculosis genome) applied to DNA extracted by commercial spin column procedure (Method B: Qiagen kit extraction), or reference DNA extraction procedure (Method C: Radomski et al. 2011) . B) Quantification in lake samples (n = 15) was performed measured by real-time PCR targeting 16S rRNA (Radomski et al. 2010)  or atpE genes.
Radomski et al. BMC Microbiology 2013 13:277 doi:10.1186/1471-2180-13-277