According to HowStuffWorks, food preservation slows down the activity of disease-causing bacteria or kills bacteria in food altogether. Preserving food keeps it from spoiling too quickly, allowing it to last for weeks or even months longer than it does normally.Continue Reading
Popular methods of preserving food include freezing, canning, dehydrating and salting. These preservation methods inhibit the growth of bacteria by either eliminating moisture from foods or removing the oxygen that harmful bacteria needs to survive and thrive, according to About.com's Bethany Moncel. Without these preservation methods, food grows bacteria, fungus and yeast, and it starts to degrade.
Another popular method of preserving food is fermenting, notes Moncel. This method is not only used to make food last longer, but it also gives food a unique flavor. Fermentation is a controlled preservation process in which the food spoils slightly, but the type of microorganisms produced help keep harmful bacteria from thriving. Examples of fermented foods include beer, yogurt, vinegar, cheese, wine and ketchup.
Eating fermented foods can also benefit health. According to the Mayo Clinic, dairy products, vinegar, and sauerkraut produce beneficial bacteria during fermentation, and this bacteria can increase energy absorption and cause the amount of healthy bacteria in the digestive tract to multiply.Learn more about Food Spoilage
Milk becomes spoiled because of the bacteria present in it. When milk is pasteurized, some but not all of the bacteria in it is killed, and the bacteria that remain eventually cause pasteurized milk to spoil.Full Answer >
Pasteurization is important because it kills harmful bacteria. Raw milk and dairy products can contain microorganisms such as Salmonella, E. coli and Listeria that cause food-borne illnesses.Full Answer >
Eating spoiled meat can be very dangerous and cause extreme stomach upset and food poisoning from E. coli or salmonella bacteria. Common symptoms of food poisoning include vomiting, diarrhea, sever stomach cramping and fever. Food poisoning can also be caused by eating undercooked foods or those that came into contact with surfaces used to cook or prepare raw meats.Full Answer >
Milk provides an environment that is particularly favorable for the growth of microorganisms, resulting in the rapid growth of mold, yeast and bacteria. Milk that is freshly drawn is around 38 degrees Celsius and needs to be cooled to 16 degrees to reduce bacterial growth and retard enzyme activity.Full Answer >