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Table 3 Nasal swab samples giving rise to mauve colonies on “CHROMagar S. aureus” agar plates

From: Direct detection of nasal Staphylococcus aureus carriage via helicase-dependent isothermal amplification and chip hybridization

# Initial Swab: CFU/Swab Molecular assay Follow-up PCR Follow-up Swab: CFU/Swab
1-27 >100,000 to >2,000 All Positive   
28 1152 Positive   
29 387 Positive   
30 38 Positive   
31 27 Negative ND 594
32 8 Positive   
33 6 Negative ND 0
34 5 Positive   
35 3 Negative Negative ND
36 3 Negative Negative 0
  1. Samples are sorted by CFU/Swab. The 29 samples giving rise to >100 mauve colonies per plate were classified as “high-count” and are indicated in bold.
  2. CFU: Colony Forming Units. ND: Not Done.