When staphylococcal occur, Biology

Assignment Help:

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.


Related Discussions:- When staphylococcal occur

Disadvantage of a monoculture, (a)What do you understand by the term 'monoc...

(a)What do you understand by the term 'monoculture'? (b) What is one disadvantage of a monoculture?   a) 'Monoculture' is the term applied to the growing

The atomic number of the isotope 238u of uranium is 92, The atomic number o...

The atomic number of the isotope 238U of uranium is 92. The nucleus of this isotope contains a) 184 protons, 92 electrons, and 54 neutrons. b) 92 protons and 146 neutrons. c) 92 pr

Definition of diabetes mellitus, Q. DEFINITION OF DIABETES MELLITUS? Th...

Q. DEFINITION OF DIABETES MELLITUS? The word "diabetes" is derived from the Greek word meaning "a siphon". The patients of diabetes had polyuria (passing excessive urine) and "

How dietary iron is absorbed in my blood vessels, What pathway does dietary...

What pathway does dietary iron follow in blood vessels

Implantation - pre-embryonic development, Implantation - Pre-Embryonic Deve...

Implantation - Pre-Embryonic Development After entering the uterus and formation of ICM, the blastocyst starts to embed in the endometrium of the uterine wall. By one week aft

Explain about the carbohydrate malabsorption, Explain about the Carbohydrat...

Explain about the Carbohydrate Malabsorption? Carbohydrates malabsorption is usually caused by an inherited or acquired (in intestinal infection, celiac disease, PEM) defect in

Illustrate disorders of the gastrointestinal tract, Q. Illustrate Disorders...

Q. Illustrate Disorders of the gastrointestinal tract? A host of disorders associated with a part or entire of the gastrointestinal tract. The important and the most frequent o

What are mycorrhizas, What are mycorrhizas? How does each participant benef...

What are mycorrhizas? How does each participant benefit in this ecological interaction? Mycorrhizas are mutualist ecological interactions among fungi and some plants roots. Fun

Explain tertiary and quaternary structure of proteins, Explain Tertiary str...

Explain Tertiary structure and Quaternary structure of proteins Tertiary structure Secondary structure, in turn, folds back and bonds to itself in a three-dimensional mann

Describe false negaive tests, Q. Describe False Negaive Tests? When pat...

Q. Describe False Negaive Tests? When patients are found to have significant coronary narrowing and fail to have exercise induced ST depression, they have been labeled false ne

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd