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Staphylococcus Aureus…read more

Slide 2

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· Staphylococcus aureus is an aerobic, coccal
(spherical) bacterium, frequently part of the skin
flora, that is commonly found on human skin and
inside the nose without causing any problems.
· About 20% of the human population are long term
carriers of S. Aureus.
· It was first identified Aberdeen, Scotland in 1880
by the surgeon Sir Alexander Ogston in pus from
surgical abscesses.
· S. Aureus is the most common species of
staphylococcus to cause Staph infections.…read more

Slide 3

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· S. Aureus can cause a range of
illnesses, from minor skin
infections, such as pimples,
boils, and abscesses, to life-
threatening diseases such as
pneumonia, meningitis, toxic
shock syndrome (TSS) and
· Its incidence ranges from skin,
soft tissue, respiratory, bone,
joint, endovascular (within a
blood vessel) to wound
infections.…read more

Slide 4

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S. Aureus and Food Poisoning
· Strains of S. Aureus are responsible for food
poisoning through the production of an
· These strains of can cause S. Aureus
gastroenteritis.…read more

Slide 5

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Growth factors
· Temperature range: 4-46 °C (39-115°F) for growth
and toxin production
Optimum Temperature: 37°C (98.6°F)
pH range: 4.8-8.0
Lowest reported Aw for growth: 0.86
Salt tolerance: 10-20 %
Sugar tolerance: 50-60 %
Tolerance to nitrites
· Although thorough cooking destroys the S.
Aureus bacteria, the toxin is very resistant to heat,
refrigeration, and freezing.…read more

Slide 6

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Food Vehicles
· Foods associated with the S. Aureus bacterium are:
· Mayonnaise based salads (egg, tuna, chicken, potato,
· Bakery products (cream-filled pastries, cream pies,
· Cured foods (Ham).
· Meat products.
· Poultry.
· Egg products.
· Dairy products.…read more

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