Flash in the Pan

The New York Times has a short science piece on whether mayonnaise increases the danger of food poisoning as the weather gets warmer. The good news: a number of studies suggest that commercial mayonnaise is not at fault, as the degree of acidic ingredients makes the substance pretty unpopular with the microbe crowd.

One prominent study published in The Journal of Food Protection found, for example, that in the presence of commercial mayonnaise, the growth of salmonella and staphylococcus bacteria in contaminated chicken and ham salad either slowed or stopped altogether. As the amount of mayonnaise increased, the rate of growth decreased. When temperatures rose to those of a hot summer day, the growth increased, but not as much as in samples that did not contain mayonnaise.

However, summer brings another danger - cold drinks and condensation that can leave water marks. Luckily, mayonnaise can bring a solution. You smear mayonnaise over the spot, leave it overnight (or even a day or more), wipe it off, and the spot is gone. There are a number of sites online that describe this technique; I know about it because my wife read it in some book, tried it, and was delighted to find that it worked. No, adding bacon, lettuce, and tomato is not necessary.

Labels: food safety, mayonnaise, science