TABLE 2.

Incorrect identification of bacteria in blood cultures using smudge plate preparation and MALDI-TOF MS system

Correct identificationa	MALDI-TOF MS identification	Confidence value	Gram stain	Incubation period (h)
Staphylococcus aureus	Prevotella buccalis	99.9	Gram-positive cocci	1
S. warneri	Staphylococcus aureus	99.9	Gram-positive cocci	1
S. haemolyticus	Lactobacillus previs	99.9	Gram-positive cocci	1
Listeria monocytogenes	Paenibacillus species	99.9	Gram-positive bacilli	1
Streptococcus intermedius	Globicatella sanguinis	99.8	Gram-positive cocci	1
S. sanguinis	Globicatella sanguinis	99.7	Gram-positive cocci	4
Corynebacterium striatum	Chryseobacterium indogenes	99.9	Gram-positive bacilli	1
Brevundimonas vesicularis	Rothia dentocariosa	99.9	Gram-negative bacilli	4

^aCorrect identification using 16S rRNA gene sequencing.