Authorities Urge Proper Cairns Refrigeration to Curb Food Poisoning

"Cairns refrigeration systems for food storage should have a temperature of no more than 5o C (-15o C for freezers), according to Queensland Health. Beyond this range, it only takes two hours for bacteria to multiply. Among other things, consumers must be on alert for deadly salmonella, E. coli 0157, and campylobacter bacteria. These bacteria thrive in temperatures between 5 o C and 60o C. In just one night, a bacteria colony can number by the billions. Extreme cold prevents them from multiplying any further and even kills them in some cases. Extreme heat, as when cooking or reheating the food, can kill the entire colony."
http://www.allaboutair.com.au/blog/authorities-urge-proper-cairns-refrigeration-curb-food-poisoning/