were enumerated by spread plating on
Pseudomonas agar base (Oxoid code CM0559) supplemented with
Pseudomonas CFC selective supplement (Oxoid code SR0103), and incubating
at 30 °C for 48 h. Enterobacteriaceae were enumerated by pour
plating on violet red bile glucose agar (VRBGA) (Oxoid code CM1082)
and incubating at 37 °C for 24 h.