We all love to have a good time at the summer picnic. So let’s not let it go bad with a case of Salmonella.. As we all know, mayonnaise and eggs are probably the two biggest culprits of the summertime picnic. Let’s start by keeping the mayo and eggs cold. If your having an outing where the food may sit out for a while before being consumed, try putting a bowl with ice under that bowl of macaroni or potato salad. Another trick is to use a vinaigrette instead of mayonnaise in the potato salad. Keep the cold food cold and the hot food hot, and let’s all have a wonderful summer.