Asked by: Tawana Casasus
asked in category: General Last Updated: 10th June, 2020

At what temperature does Staphylococcus aureus die?

S. aureus is resistant to freezing and survives well in food stored below -20°C; however, viability is reduced at temperatures of -10 to 0°C. S. aureus is readily killed during pasteurisation or cooking.

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Keeping this in view, can Staphylococcus aureus be killed by heat?

The toxin produced by staph bacteria is very heat-stable—it is not easily destroyed by heat at normal cooking temperatures. The bacteria themselves may be killed, but the toxin remains. Re-heating foods, even at high temperatures, that have been contaminated with toxins will NOT make them safe to eat!

Secondly, what does Staphylococcus aureus need to survive? Staphylococcus aureus grows best in an aerobic (oxygen-rich) environment but it can also live in anaerobic conditions (without oxygen). The bacterium has a diameter of about 0.8 µm, 60 times smaller than a hair's breadth. S. aureus is termed an opportunistic pathogen.

Additionally, is Staphylococcus aureus heat resistance?

The bacteria grow best at our body temperature. Thorough cooking destroys the Staphylococcus aureus bacteria, but the toxin is very resistant to heat, refrigeration, and freezing.

How fast does Staphylococcus aureus grow?

S. aureus grows rapidly in rich medium (doubling time 20 min) and yields a yellow colony on plate owing to the production of the carotenoid pigment staphyloxanthin. Although rare, small colony variants (SCVs) of S. aureus have been observed (Proctor et al., 1998).

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