In addition to MALDI-TOF MS, other rapid biochemical tests performed
included rapid coagulase testing to identify Staphylococcus aureus; rapid
oxidase testing to identify Pseudomonas aeruginosa; rapid indole, rapid
PYR, rapid oxidase, motility, and lysine testing to identify Escherichia
coli and differentiate it from Shigella species; rapid catalase and rapid
indole testing to identify most Propionibacterium acnes; rapid
desoxycholate or optochin testing to differentiate Streptococcus
pneumoniae from Streptococcus mitis species group; and Lancefield typing
to identify β-hemolytic Streptococcus species. 16S rRNA gene PCR/
sequencing was performed if MALDI-TOF MS and/or biochemical testing