Bifidobacterium longum subsp. infantis|341709 |BNCC

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Bifidobacterium longum subsp. infantis (Reuter) Mattarelli et al.

Subculture procedure	① Prepare one test tube containing 5-10 mL of liquid culture medium and two plates; ② Open the safety cabinet, burn the top with an alcohol lamp, quickly drip sterile water to break it, and then use tweezers to crush it; ③ Transfer 0.5mL of liquid culture medium into a freeze-drying tube, dissolve it thoroughly, and then transfer it back into the liquid test tube, mixing well; ④ Transfer 0.2mL of bacterial suspension into a Agar plate, apply evenly, and repeat twice to obtain two plates; ⑤ Place all liquid test tubes and plates under the above cultivation conditions, and the bacterial strains can be used once they grow.
Growth conditions	37 ℃; 48-72h; anaerobic;
Storage conditions	2-8 ℃
Safety level	1
morphology	The colony diameter is 0.5-1mm, circular, with neat edges, opaque, gray white on the front, raised in the middle, smooth on the surface, easy to pick up, G+(blue purple), rod-shaped
Sharing mode	Public welfare sharing

Description

1. Name: Bifidobacterium infantisreuter
2. BNCC No.: 341709
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. BBL liquid medium: peptone 15.0g, glucose 20.0g, yeast extract 2.0g, soluble starch 0.5g, sodium chloride 5.0g,L-cysteine 0.5g, tomato extract 5.0g, liver extract 2.0g, Tween 80 1.0g, distilled water 1L,pH6.6-7.0. 115 ℃,20min.
2. Atmosphere: anaerobic
3. Temperature: 37 ℃,48h
Notes:
1.Normal culturing time, 1-2days for bacterial, 3days 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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