Finally, the disinfection of produce with ozone is shown in Fig. 4.
Carrots and lettuce showed a low degree of inactivation even after
15 min. Meanwhile,Singh, Singh, Bhunia, and
Stroshine (2002) found that after using 5.2 mg/L of gaseous
ozone (15 min) In shredded lettuce and baby carrots, the inactivation of E.coli O157:H7 was approximately 1.6 and 2.5 log reduction, respectively, showing that disinfection of fresh produce sometime requires th combination of several treatments, such as washing, to achieve higher inactivation. There are reports about the efficiency of ozone in vegetable products that present some injuries and wounds, in which bacteria were located and protected from the action of zone and were not inactivated (Kim et al., 2003)