【 Principle 】

Tryptone, beef extract, and yeast extract provide its nutrients; Sodium pyruvate and glycine stimulate the growth of Staphylococcus aureus; Lithium chloride inhibits non staphylococcal microorganisms; Agar is a coagulant for culture media.

Main components

Composed of tryptone, beef extract, yeast extract, sodium pyruvate, glycine, lithium chloride, agar, and distilled water.

Storage conditions and expiration date

Storage conditions: This product should be stored in a dark environment at 2-8 ℃.

Validity period: The unopened original packaging has a validity period of 3 months.

This product is a disposable product.

[Sample Requirements]

Samples such as sputum and wound secretions from the human body.

Food sample inspection: Separation and counting of Staphylococcus aureus in meat products, pastries, and dairy products, screening for sources of food poisoning contamination.

Food poisoning specimen testing: Separation of enterotoxigenic Staphylococcus aureus from vomit and leftover meals confirms the diagnosis of Staphylococcus aureus food poisoning.

Clinical specimen culture: isolation of pathogenic Staphylococcus aureus from pus, wound secretions, etc.

Hospital infection environmental hygiene monitoring: sampling of instruments, medical hands, and environmental surfaces to monitor the contamination of Staphylococcus aureus.

Staphylococcus aureus

Biological characteristics: Staphylococcus aureus, without spores or flagella, facultative anaerobic; Resistant to potassium tellurite, can reduce potassium tellurite to form black tellurium precipitate; Generate lecithin enzyme to break down phospholipids in egg yolk.

Plate colony characteristics: Black colonies surrounded by a turbid milky white phospholipid precipitation ring.

Pathogenesis: Skin suppuration, wound infection, enterotoxin type food poisoning, hospital acquired infection.

Coagulase negative Staphylococcus (Staphylococcus epidermidis, Staphylococcus saprophyticus)

Features: Resistant to tellurium, it can grow into black colonies, most of which do not lay phospholipases, and there are no milky white halos.

Colony: Black fungus colonies, with no turbid circles around.

Clinical: indwelling catheter, urinary tract infections.