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Table 2 Performance evaluation of BSI-HMGS in the detection of clinical blood culture samples

From: Rapid and precise identification of bloodstream infections using a pre-treatment protocol combined with high-throughput multiplex genetic detection system

Pathogens

HMGS

Reference results

PPA

NPA

OPA

 

+

−

K. pneumoniae

+

63

0

0.984

1.000

0.998

 

−

1

462

   

B. cepacia

+

1

0

1.000

1.000

1.000

 

−

0

525

   

P. mirabilis

+

3

0

1.000

1.000

1.000

 

−

0

523

   

M. catarrhalis

+

0

0

NA

NA

NA

 

−

0

526

   

S. marcescens

+

13

0

1.000

1.000

1.000

 

−

0

513

   

H. influenzae

+

1

0

1.000

1.000

1.000

 

−

0

525

   

P. aeruginosa

+

16

0

1.000

1.000

1.000

 

−

0

510

   

E. cloacae complex

+

9

0

1.000

1.000

1.000

−

0

517

   

E. coli

+

56

0

1.000

1.000

1.000

 

−

0

470

   

A. baumannii

+

14

0

0.933

1.000

0.998

 

−

1

511

   

S. maltophilia

+

10

0

1.000

1.000

1.000

 

−

0

516

   

S. enterica

+

2

0

1.000

1.000

1.000

 

−

0

524

   

Staphylococcus

+

56

0

0.966

1.000

0.996

 

−

2

468

   

S. aureus

+

36

0

1.000

1.000

1.000

 

−

0

490

   

Streptococcus

+

7

0

0.875

1.000

0.998

 

−

1

516

   

S. pyogenes

+

1

0

1.000

1.000

1.000

 

−

0

525

   

S. agalactiae

+

4

0

1.000

1.000

1.000

 

−

0

522

   

S. pneumoniae

+

2

0

1.000

1.000

1.000

 

−

0

524

   

E. faecalis

+

15

0

1.000

1.000

1.000

 

−

0

511

   

E. faecium

+

28

0

1.000

1.000

1.000

 

−

0

498

   

C.albicans

+

40

0

0.976

1.000

0.998

 

−

1

485

   

C. tropicalis

+

8

0

1.000

1.000

1.000

 

−

0

518

   

C. parapsilosis

+

19

0

1.000

1.000

1.000

 

−

0

507

   

C. glabrata

+

17

0

1.000

1.000

1.000

 

−

0

509

   
  1. The number of Staphylococcus and Streptococcus represent the number of pathogens with a single Staphylococcus and Streptococcus peak, respectively, excluding the two-peak pathogens. HMGS: high-throughput multiplex genetic detection system; PPA: positive percent agreement; NPA: negative percent agreement; OPA: overall percent agreement; NA: not applicable