Bifidobacterium longum|187962 |BNCC

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Bifidobacterium longum

Subculture procedure	① Prepare 2 of the above plates; ② After disinfecting the surface of the ampoule tube, open it in a safety cabinet, burn the top with an alcohol lamp, quickly drip sterile water to break it, and then use tweezers to crush it; ③ Take 0.5mL of sterile water (placed in an anaerobic environment for 24 hours) and transfer it into a freeze-drying tube. After fully dissolving the bacterial powder, transfer it into 2 plates at a rate of 200 μ L per Agar plate and apply evenly; ④ Place the petri dish under the above cultivation conditions for cultivation, and once the bacterial strain grows, it can be used.
Growth conditions	37 ℃; 24-48 hours; anaerobic
Storage conditions	2-8 ℃
Safety level	1
morphology	The colony diameter is 1-2mm, circular, with irregular edges, opaque, white on the front, raised in the middle, smooth on the surface, easy to pick up, G+(blue purple), Bacillus, purity: pure
Sharing mode	Public welfare sharing

1. Description

1. Name:Bifidobacterium longum

2. BNCC No.: 187962

3. Biosafety level: 4

2. Storage conditions:

Storage of freezed dried ampoule and agar slant at 2°C to 8°C.

3. Growth Conditions:

1. Improved MRS medium: MRS medium + 0.5% L-cysteine (MRS medium: cheese peptone 10.0g, beef powder 8.0g, yeast powder 4.0g, glucose 20.0g, magnesium sulfate 0.2g, sodium acetate 5.0g, triammonium citrate 2.0g, dipotassium hydrogen phosphate 2.0g, manganese sulfate 0.05g, Tween 80 1.0g, distilled water 1000mL. pH6.2±0.2.121 ℃

2. Atmosphere: anaerobic

3. Temperature: 37 ℃

4.Notes:

1.Normal culturing time, 24-48hours for bacterial, 72 hours for yeast, 5-7days for mould, 7-10days for fungal.

2.Agar slant shall be inoculated asap, and do not keep the storage for more than 3 months.

3.Please recover the strains in strict accordance with this instruction, otherwise the replacement of the strain are not be available in case of viability loss caused by different media or growth conditions.

4.Waste generated from the handling process should be discarded after high-pressure sterilization.

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