What is the optimal pH for Staphylococcus aureus?

Growth of S. aureus occurs over the pH range of 4.0–10.0, with an optimum of 6–7 (ICMSF 1996; Stewart 2003). S. aureus is uniquely resistant to adverse conditions such as low aw, high salt content and osmotic stress.

What does Staphylococcus aureus need to grow?

Staphylococcus aureus grows best in an aerobic (oxygen-rich) environment but it can also live in anaerobic conditions (without oxygen). S. aureus can also cause food poisoning.

What pH kills staph?

Whereas E coli were killed most effectively at pH 6.0, little or no killing of S aureus took place below pH 6.5 and, although S uberis were also killed better above neutral pH, significant killing also took place at acidic pH levels.

What’s the best temperature for Staphylococcus aureus growth?

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 A w for growth: 0.86

Which is the best pH range for bacteria to grow?

Most bacteria are neutrophiles and grow best at near-neutral pH (center curve). Acidophiles have optimal growth at pH values near 3 and alkaliphiles have optimal growth at pH values above 9.

What foods can Staphylococcus aureus be found in?

Staphylococcus aureus 1 Sources of the organism: 2 Associated foods: 3 Growth conditions: Optimum Temperature: 37°C (98.6°F) pH range: 4.8-8.0 Lowest reported A w for growth: 0.86 The Disease: The Disease: Staphylococcal food intoxication results from consuming food contaminated with the 4 Symptoms include: 5 Onset time:

How long is the exposure time for Staph aureus?

If at any time the product is held at internal temperatures above 70°F (21.1°C), exposure time (i.e., time at internal temperatures above 50°F (10°C) but below 135ºF (57.2ºC)) should be limited to 2 hours (3 hours if Staphylococcus aureus (S. aureus) is the only pathogen of concern), OR Alternatively, exposure time (i.e., time at