Rice Cooking.
They also need a warm temperature, an ideal temperature being 37 ° C. All rice must be considered to contain B cereus If the rice is cooked, the spores remain intact as the temperature of the cooking rice is too high for germination and food safety is not affected. If the rice is drained and digestion immediately or retained above 63 ° C, the spores will not germinate. During digestion, the spores will not germinate due to the temperature of the food and the acidity of the stomach.
After draining the hot, cooked rice, it must be held under cold running water until cool, to for be served cold or used for cooked. The rice is then drained and needed sufficient time to germinate as the rice was brought through the temperature danger zone quickly and food safety is not compromised.
During cooking, the rice remains in the kitchen area to cool down overnight. During the slow cooling period, the spores will start to germinate at 37 ° C. As there is moisture and protein in rice the germinated spores will vegetate or grow. during growth, B cereus release two exotoxins into the rice. The exotoxins are heat stable and can not be destroyed by cooking. When the rice is used B cereus If the rice is reheated, the bacteria turn back into spores, which will not be a food safety hazard, but the poisons will remain, which will cause food poisoning.
Even if the rice is manufactured correctly by a takeaway, food poisoning can still result. Always ensure the rice is refrigerated, not left out overnight, as the spores will germinate as above.
Toxins.
Boxia can produce two types of toxins, namely exotoxins and endotoxins. S aureus and C botulinum Thus exotoxins, which can prove to be a serious food safety problem. Exo means produced outside the body.
Another type of poison is known as an endotoxin which produces spores. Gram negative bacteria have material called LPS in their external membrane which produces poisoning. An example of gram negative bacteria that release endotoxin is Salmonella spp .
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