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Table 2 Effect of applying the taxonomic filter in the variant analysis of samples of the bacterial dataset

From: Contaminant DNA in bacterial sequencing experiments is a major source of false genetic variability

Study

Mean percentage of target organism (%)

Mean number of vSNPs removed (median; IQR)

Mean number of fSNPs recovered (median; IQR)

Pearsonā€™s correlation coefficient between removal of vSNPs and recovery of fSNPs

Pearsonā€™s correlation coefficient between removal of vSNPs and percentage of target organism

A. baumannii

97.30

89 (43; 165)

57 (10; 113)

0.99

0.25

C. difficile

76.74

299 (397; 379)

27 (16; 32)

0.45

0.23

E. faecalis

89.96

30 (19; 33)

4 (3; 5)

0.65

āˆ’ā€‰0.13

E. faecium

94.38

9 (5; 10)

3 (2; 5)

0.47

āˆ’ā€‰0.45

K. pneumoniae

84.38

549 (62; 112)

73 (13; 41)

0.76

āˆ’ā€‰0.44

L. pneumophila

99.06

12 (0; 8)

3 (0; 1)

0.99

āˆ’ā€‰0.63

L. monocytogenes

98.42

2 (0; 1)

0 (0; 0)

0.49

āˆ’ā€‰0.43

N. gonorrhoeae

99.17

0 (0; 0)

0 (0; 0)

0.34

āˆ’ā€‰0.09

P. aeruginosa

97.43

9 (2; 14)

1 (0; 1)

0.50

āˆ’ā€‰0.11

S. enterica

95.01

97 (91; 87)

7 (6; 12)

0.14

0.02

S. aureus

91.42

50 (22; 50)

9 (3; 9)

0.54

āˆ’ā€‰0.10

T. pallidum

39.75

45 (34; 52)

6 (5; 4)

0.63

āˆ’ā€‰0.48

V. cholerae

91.32

9 (5; 16)

2 (1; 3)

0.76

āˆ’ā€‰0.56