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Airborne archaeal and bacterial 16S rRNA gene concentrations from dairy barn samples (average ± SEM), as determined by quantitative PCR. Comparison between IOM, NIOSH, and Coriolis air samplers (n = 13 each). LOD, 4 × 102 16S rRNA genes for archaea and 2 × 103 16S rRNA genes for bacteria. No statistical differences between results from the three air samplers tested (archaea, P = 0.3135; bacteria, P = 0.4981).
