If, like me, you perform regular bench rounds of the diagnostic bacteriology laboratory, you will often see an alpha-haemolytic organism on the plate that Gram stains as a streptococcus. Now comes a dilemma, do you attempt to put this through the MALDI-TOF (ours is a Bruker, by the way) or go straight for ViTEK?
Currently, we would go for the latter, but after seeing this paper, I wonder if this should be reconsidered. Angeletti et al, using a Bruker loaded with the BioTyper software version 3, seem to imply that not only can viridans group streptococci be identified, but that the Bruker was able to discriminate between S. mitis and S. oralis. This would be much leaner in the laboratory and represent a significant cost saving, especially as no extraction was performed in this study.