There are a number of limitations with this current study. We recognize
the limitations of MALDI-TOF MS to reliably separate certain species.
In keeping with previous literature, the MALDI-TOF MS system
studied did not discriminate between E. coli and Shigella species or
S. mitis species group and S. pneumoniae, in addition to some species
of viridans group streptococci, E. cloacae complex, and anaerobes