(vii) Enterobacteriaceae on double-layered plates of Violet Red Bile Glucose agar (VRBG, Oxoid)
incubated at 30 C for 24 h. All microbial counts are expressed as the log of the colony-forming units per gram (log CFU/g) of sample (detection limits were 2 log CFU/g and 1 log CFU/g for spread plates and pour plates techniques, respectively).
All analyses were performed in triplicate.