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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.