Species identification is performed by conventional biochemical tests along with their growth characteris-tics. The p-nitro-a-acetylamino-p-hydroxy propiophe-none (NAP) test can be used to differentiate NTM from the MTB complex directly from the BACTEC broth. High-performance liquid chromatography and gas-liquid chromatography can be used to speciate and analyze the mycobacterial cell wall fatty acids. Nucleic acid probe kits have been used to directly amplify M. tuberculosis and Mycobacterium avium intracellulare from MB/BacT and BACTEC cultures using nucleic acid sequence-based amplification assay (NASBA, bioMerieux) and acridinium-ester-labeled DNA probes with a sensitivity and specificity of nearly 100%. The biomass obtained in MB/BacT is superior to BACTEC for direct molecular assays.
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The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.