Staphylococcus aureus belongs to the genus Staphylococcus, which is a representative of Gram-positive bacteria and a common food-borne pathogenic microorganism. The optimum growth temperature of the strain is 37℃, pH is 7.4, and it is tolerant to high salt, and can grow in an environment with salt concentration close to 10%.

Staphylococcus aureus is often parasitic in human and animal skin, nasal cavity, throat, stomach, carbuncle and sores, and it is also ubiquitous in air, sewage and other environments.

Extended data:

Staphylococcus aureus is spherical, the colony in the culture medium is round, the colony surface is smooth, the color is colorless or golden yellow, and there is no characteristic of expanding growth. Staphylococcus aureus was cultured in Columbia blood plate, and there was a transparent hemolysis circle around the colony under light.

Staphylococcus aureus has a certain tolerance to high temperature, and can only be completely killed in a high temperature environment above 80℃ for 30 minutes. In addition, Staphylococcus aureus can survive in high salt environment, and the maximum tolerance is 15% NaCl solution.

Because of the structural characteristics of bacteria, 70% ethanol can kill them quickly in a few minutes. The metabolic type of Staphylococcus aureus is aerobic or facultative anaerobic, which has low requirements for the environment. 37℃ is the optimum growth temperature, and it can survive in various harsh environments. Therefore, bacteria can be cultured normally with general nutrient agar.

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