【 Principle 】

Main components

Composed of peptone sodium chloride, potassium dihydrogen phosphate, sodium dihydrogen phosphate, 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 6 months.

This product is a disposable product.

Sample dilution: As a diluent, prepare a homogeneous sample and adjust the osmotic pressure.

Pre bacterial revival: repairing damaged microorganisms and improving the detection rate of pathogenic bacteria.

Microbial enrichment culture: used for pre cultivation of Enterobacteriaceae bacteria such as Salmonella.

Sample transportation: Maintaining microbial activity, suitable for short-term storage and transportation of test samples.

Neutralization buffer: Buffer the acidity, alkalinity, and residual disinfectants in the sample to eliminate antibacterial effects.

Salmonella

Gram negative bacteria, without spores, mostly with flagella, capable of movement; Facultative anaerobic, rapidly proliferates in BPW, and the liquid becomes uniformly turbid after cultivation; Resistant to mild environmental damage, can complete bacterial repair here; Fermentation of glucose produces acid and gas, without fermentation of lactose and sucrose. The hydrogen sulfide test is mostly positive.

Escherichia coli

Gram negative short rod-shaped bacteria, with flagella, active movement, and some have capsules; Rapid reproduction rate, significant turbidity in liquid culture; Strong adaptability and tolerance to conventional sample environments; Fermentation of lactose and glucose, acid and gas production, typical IMViC test (++--).

Cronobacter (Enterobacter sakazakii)

Gram negative bacteria with flagella and no spores; Can tolerate stress environments such as dryness and low temperature, and can recover and grow well in BPW; Fermentation of various sugars, some strains produce yellow pigments.

Shigella genus

Gram negative Bacillus subtilis, lacking flagella, motility, and spores; Facultative anaerobic, with mild growth and uniform turbid liquid; Fermentation of glucose produces acid but not gas, and does not ferment lactose.