Abstract
The concentrations of sodium dodecyl (lauryl) sulfate (SDS) found in the sediments of the respiratory samples pretreated with SDS-NaOH varied between 3.36 and 12.42 mg/ml. These concentrations of SDS were higher than the level considered critical (> or = 0.16 mg/ml) to obtain negative results with the Gen-Probe Amplified Mycobacterium Tuberculosis Direct Test. Extensive washing, after neutralization of sediment, is sufficient to remove all traces of detergent which interfere with the enzymes used by the Mycobacterium Tuberculosis Direct Test assay.
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