Potential of cell-free supernatants from cultures of selected lactic acid bacteria and yeast obtained from local fermented foods as inhibitors of Listeria monocytogenes, Salmonella spp. and Staphylococcus aureus

Table 3 Log CFU mL ^-1 of CFS-treated Salmonella (MI1) (A) and S. aureus (B) co-cultures

Comparisons were made between CFUs from all CFS-treated co-cultures on day 3 and CFU from the control on day 3. CFUs from the day 0 control (0% CFS) co-cultures are for reference only, i.e., to indicate both initial CFUs and that growth occurs in the absence of CFS treatment.
Δ - Colonies were extremely small even after prolonged incubation for 48 hrs.
* - Obtained by plating of 50 μL (undiluted) instead of the previous 1 μL (undiluted) plating.
** - This value was 0.0 even after plating 10 or 50 μL directly (without dilution) instead of 1 μL.
^∞For Salmonella (MI1), this value was significantly less than its respective day 3 control CFU (P ≤ 0.05). Since all other experimental CFUs of all CFSs on day 3 were less than this value, they were also significantly less than the day 3 CFU.
^θFor S. aureus, this value was significantly less than its respective day 3 control CFU (P ≤ 0.05). Since all other experimental CFUs of all CFSs on day 3 were less than this value, they were also significantly less than the day 3 CFU.

ISSN: 1756-0500