Two E. faecium and 3 V. carniphilus species were highly antagonistic to L. innocua, S. aureus and H. alvei repressing their growth by reduction levels able to reach 2, 2.7 and 2.4 log10 cfu/ml compared to the positive control made of sole the target microorganism. Furthermore, planktonic cells were more sensitive to the bacteriocin-like substances than sessile ones.
First results suggest the possibility of selecting bio-preservatives among the endogenous house flora of the studied small-scale facility, that could be implemented on the processing surfaces to repress the growth of undesirable microorganisms.