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Table 2 Total and viable microbiological characteristics of particles accumulated in ISS and other Earth-based cleanrooms

From: Microbiomes of the dust particles collected from the International Space Station and Spacecraft Assembly Facilities

Sample Cutivable bacterial population (CFU/g) that are: qPCR-based bacterial population (16S rRNA copies/g) Viable bacterial population (B/A ×100) ATP-based microbial population (RLU/g): Viable microbial population (D/C ×100)
  Bacteria Fungi Untreated (A) PMA-treated (B) Total ATP (C) Intracellular ATP (D)
ISS HEPA 8.17 × 105 2.34 × 103 1.7 × 109 2.91 × 107 1.7 2.06 × 107 3.54 × 105 1.7
ISS Debris 1.34 × 106 5.02 × 104 4.5 × 108 1.21 × 107 2.7 3.50 × 107 2.65 × 107 75.7
JPL-SAF Debris 1.28 × 105 5.05 × 104 3.1 × 108 2.07 × 108 66.8 1.91 × 107 2.10 × 106 11.0
JPL-103 Debris 1.40 × 104 3.30 × 103 4.3 × 108 1.90 × 107 4.5 2.60 × 106 1.20 × 106 46.2