“…The ability to produce biogenic amines, such as 2-phenylethylamine, putrescine, cadaverine, agmatine, spermine, spermidine, histamine, and tyramine, should also be ruled out by gene analyses [ 100 ]. Additionally, other unwanted genes involved in virulence, such as asa1 , agg , efaA , hyl , esp , cylL L , cylL S , ace , and gelE , should also be tested with the aim to ensure the lack of virulence in the selected strain [ 101 ]. Finally, the antibiotic resistance must be evaluated both for the possible involvement of some of these bacteria, mainly E. faecalis and E. faecium , in human infections [ 102 ] and the induction of potential antimicrobial resistance through horizontal gene transference [ 103 ].…”