Food. Acidity.Temperature. Time. Oxygen. Moisture


Most bacteria needs nutrients to survive.TCS food supports the growth of bacteria better than other types of food.
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Bacteria grows best in food that contains little or no acid. pH is the measure of acidity. The pH scale ranges from 0 to 14.0. A value of 0 is highly acidic , while a value o 14 is highly alkaline, A pH of 7 is neutral.
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Bacteria grow rapidly between 41 degrees Fahrenheit and 135 Fahrenheit. This range is known as the danger zone
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Bacteria needs time grow. The more time bacteria spends in the temperature danger zone the more opportunity they have to grow to unsafe levels.
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Some bacteria need oxygen to grow. Others grow when oxygen is not these.
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Bacteria grow well in fops with high level of moisture . The amount of moisture available in food for this growth is called water activity. The scale a/w scale ranges from 0.0 to 1.0. The higher the value, the more available moisture in the food.
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