4. Results
A large number of fresh fruits and vegetables samples for six different commodity groups (leafy vegetables, tomatoes, leafy herbs, green onions, cantaloupes and berries) were collected and tested for the presence of a variety of bacteria over a four year period. Control charts and seasonal effects were calculated for each commodity and are presented in Section 4.1. Positive rates and prevalence of bacterial contamination in all commodities are summarized in Table 1 in Section 4.2.