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Table 3 Comparison of the sensitivities of serotyping and MALDI-TOF MS in the identification of selected bacteria to the species and genus levels

From: Comparison of biomarker based Matrix Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS) and conventional methods in the identification of clinically relevant bacteria and yeast

Organism (n)

Number (%) of isolates with Correct identification to species level:

Number (%) of isolates with Correct identification to genus level:

Serotyping

MALDI-TOF MS

P value

Serotyping

MALDI-TOF MS

P value

Salmonella sp. (18)

-

-

 

18 (100.0)

18 (100.0)

 

Shigella flexneri (6)

6 (100.0)

0

0.001

6 (100.0)

0

0.001

Shigella sonnei (2)

2 (100.0)

0

0.046

2 (100.0)

0

0.046

Shigella dysentriae (1)

1 (100.0)

0

0.157

1 (100.0)

0

0.157

Strep agalactiae (13)

12 (92.3)

13 (100.0)

0.308

13 (100.0)

13 (100.0)

 

Strep pyogenes (7)

7 (100.0)

7 (100.0)

 

7 (100.0)

7 (100.0)

 

Total (29/47)

28 (96.6)

20 (69.0)

0.005

47 (100.0)

38 (80.9)

0.002