MacConkey sorbitol agar (SMAC; without Rif) for E. coli O157:H7, and
Oxford medium base with modified Oxford antimicrobic supplement
(MOX) for L.monocytogenes. TSA, SMAC, andMOX plates were incubated
at 37 ± 2 °C for 24 ± 3 h; BSA plates were incubated at 37 ± 2 °C
for 48 ± 3 h. Colonieswere counted and bacterial populationswere determined.
The calculated CFU per millimeter of plated solution multiplied
by 10 ml (the volume of diluent) was considered to be
equivalent to the CFU recovered per nut