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In older children and adults the normal intestinal bacteria suppress development of C. botulinum. [ 52 ] While commercially canned goods are required to undergo a "botulinum cook" in a pressure cooker at 121 °C (250 °F) for 3 minutes, [ citation needed ] and thus rarely cause botulism, there have been notable exceptions.
The surfaces used were carpet, ceramic tile, stainless steel and wood. The food was left on the surface for intervals of 5, 30 and 300 seconds. The scientists assessed the amount of E. aerogenes transferred between surface and food. Since bacteria tended to be attracted to moisture, wet food had more risk to have bacteria transferred than dry food.
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Along with some strains of Clostridium butyricum and Clostridium baratii, these bacteria all produce the toxin. [ 2 ] Botulinum toxin can cause botulism , a severe flaccid paralytic disease in humans and other animals, [ 3 ] and is the most potent toxin known to science, natural or synthetic, with a lethal dose of 1.3–2.1 ng/kg in humans.
Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria. The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, [1] [2] including the gastrointestinal tract, skin, mammary glands, seminal fluid, uterus, ovarian follicles, lung ...
Staphylococcus and Corynebacterium were among the most common types of bacteria found in the navels of this project's volunteers and these types of bacteria have been found to be the most common types of bacteria found on the human skin in larger studies of the skin microbiome [18] (of which the Belly Button Biodiversity Project is a part). [10]
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