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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.
Cobalt deficiency The deficiency of cobalt is more commonly seen in ruminants fed on diets deficient in this essential micronutrient. Cobalt is stored only in limited amounts
if i start in the superior mesenteric vain where do i have to go through to get to the left anterior circumflex humeral artery. by the way of the hepatic portal vein and the heart
What are the uses of construction of a retaining wall? The retaining wall is constructed whenever space requirement do not allow the natural slope to be formed for an excavatio
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Taeniasis Taeniasis is a zoonotic disease caused by specific cestodes. The two parasites of major importance are Taenia saginata and T. solium. Both in their adult forms, are
Define Methods for Studying the Nutrient Requirements? 1) Population survey of nutrient intakes of healthy individuals is one method of estimating nutrient requirements. The av
Illustrate about the neuropsychological assessment A neuropsychological assessment is a clinical examination of both the working brain and dysfunctional brain. Neuropsychologic
Define Physical activity as a factor for obesity? Sedentary life style with lack of an exercise schedule tends to make one obese. As we approach middle age, our physical activi
How can coacervates be formed of phospholipids or polypeptides? Phospholipids are amphipathic molecules, i.e., they present a polar portion and a nonpolar portion. In contact w
Physiognomy and Pattern Physiognomy is the general appearance of vegetation as determined by the growth, form of dominant species. It may be considered a synthetic character
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