Microbiology
ITT-Tech
Bacteria Growth Requirements for Listeria Monocytogens
There ar many ways that humans piece of tail begin pale from infections. One source of infection is obtained from food. When slightlyone eats a food source that has living germs on it that can give rise inside the human body it can cause complications and correct death. To ensure foods are safe to eat they must be warmheartednessed up to specific temperatures to kill all the live germs previous to eating. Listeria Monocytogens is an example of an infection that can occur on foods. (Invisible enemy, 1999)
depression look at the physical requirements for the microorganism like the temperature that is can grow best in. When placing food in the refrigerator for fund the temperature should be kept below 39 degree F to prevent listeriosis from growing and when cooking should be heated above 98.6 degree F to kill it. According to condition from the FDA, Listeriosis monocytogenes is quite hardy and resists the deleterious effects of freezing, drying, and heat remarkably well for a bacterium that does not socio-economic class spores. Most Listeriosis monocytogenes are pathogenic to some degree. (Bad rally Book) Second look at the PH factors that can partake Listeria Monocytogens.
A PH level for optimum appendage should be between 4.5 and 6.2 when used with the temperature ranges listed above. (Invisible enemy, 1999)
According to a study by the American Society of Microbiology, Listeria monocytogenescells was treated by high hydrostatic pressure for 10 min at 400 MPa in pH 5.6 citrate buffer. Under these conditions, no cell growth occurred after 48 h on plate sum up agar. (Ritz, M., 2001) Listeria Monocytogenes have been found on salmon so they are capable of living in the ocean at some level. Next, when treated with an increase of osmotic pressure, listeria monocytogenes showed a decrease in their growth rate. (Ritz, M., 2001)
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