In a study by Yu and others (2001), strawberries dipped in DWand
NaOCl solution (130 ppm free chlorine) within 1 min reduced theE.
coliO157:H7 populations by approximately 0.8 and 1.3 log10CFU/g,
respectively. These larger reductions compared with those observed
in the current study may be attributed to the differences between the
sensitivity of single and multiple strains to disinfecting agent. Also,
the exposure time during dip-inoculation in the current study was
much longer, which may facilitate the internalization of pathogens
within sample tissues, thus protecting them from direct exposure
to disinfectants. Lastly, different methods for the recovery of viable
cells from treated strawberries may be another factor resulting in
the dissimilar results