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BIOLOGICAL FOOD CONTAMINATION Bacterial grow on food Bacteria are a form of microbial contamination Bacteria are a leading cause of foodborne illness Bacteria can grown and live on your skin Bacteria are single-celled microorganisms INTERESTING FACTS ABOUT BACTERIA: There are many more bacteria on and in your body than there are cells that make up your body. Though bacteria cause disease, they also perform any functions important to life on earth. They help create the earth’s atmosphere. And they break down organic material, recycling it to be used again in the life cycle. Bacteria have other uses beneficial to us. For example, we use bacteria in the making of cheese, yogurt, and wine. And we use bacteria to make antibiotics, including penicillin. Only small portions of the world’s bacteria are harmful to humans. But these few are responsible for the majority of human diseases. HOW BACTERIA MULTIPLY In order to control bacteria, we need to know how they multiply. Bacteria reproduce by simple cell division. Under the right circumstances, a single bacterium enlarges, and then splits into two identical cells. Some bacteria can split into two copies of themselves every twenty minutes: one cell becoming two, two become four, and so on. Next, we will see how this process works, in time.
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Understanding how quickly bacteria multiply on food is essential to eliminating foodborne illness. Bacteria multiply by 2 every 20 minutes 1 hour 8 5 hours 32,000 7 hours 2 million 8 hours 16 million 10 hours 1 billion bacterial There are six primary facts that enable bacteria t live and multiply. Environmental Factors
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This note was uploaded on 06/29/2011 for the course FOOD SAFET 101 taught by Professor Strickland during the Spring '11 term at Art Institute.

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