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Staphylococci exist in air, dust, sewage, water, milk and food or on food equipment, environmental surfaces, humans and animals. Humans and animals are the primary reservoirs. Staphylococci are present in the nasal passages and throats and on the hair and skin of 50 percent or more of healthy individuals. A wide range of foods maybe involved in Staphylococcal food poisoning including ham, turkey, chicken and chicken salad, baked products, especially filled pastries, table ready-meats (sausage etc.), precooked frozen foods and dairy products.
S. aureus cells are relatively more resistant than many gram negative food spoilage organisms. Human intoxication is caused by ingesting enterotoxins produced in food by strains of S. aureus, usually because the food has not been kept hot enough (60ºC, or above) or cold enough (7.2ºC, or below). In frozen foods they may survive even at -10ºC. In general, survival of S. aureus is best in foods that contain high concentration of sugars, eggs and buffering component such as phosphates and protein. Salt concentration less than 9.5%, temperature more than 20ºC and a pH in the range 6-8 are favourable for growth and enterotoxin formation.
basis of genetic transplantation
Trout beck zone - Lotic Ecosystem This is larger and more constant than the head stream. The greater volume of torrential water carves channels into exposed rock floor (bed ro
What are the penetrance and the expressivity of a gene? The Individuals that carry a same genotype don't always manifest in an identical manner the correspondent phenotype. The
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair. a. A=C b. A=T c. G=C d. B=Q e. T=T Can you also explain it please so if I'm ask
Why is there a concern on waste water?
Quantitative Methods - Therapeutic diets Quantitative Methods: These are often essential for constructing Lherapeutic diets. The two ways by which this could be done are as
How do CAM plants vary from both C 3 and C 4 plants? CAM plants open their stomata at night, while C 3 and C 4 plants open their stomata during the day.
Explain the several terms ATP, NAD, and FAD ? Adenosine Triphosphate (ATP) is an ester, an organic compound formed from a reaction between carboxylic acid and an alcohol. ATP i
Define Beaker - Nutritional Biochemistry? It is used for storing a liquid to be used in a reaction and for dissolving a substance in a solvent to make its solution. A beaker sh
Epimerism:- Another type of stereo isomerism known as epimerism occurs with respect to a single asymmetric carbon atom of a monosaccharide possessing more than one asymmetric
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