Lactobacillus delbrueckii subsp. delbrueckii|133039 |BNCC

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Lactobacillus delbrueckii subsp. delbrueckii

Subculture procedure	① Prepare 1-2 of the above 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 Take 0.5mL of sterile water and transfer it into a freeze-drying tube. After fully dissolving the bacterial powder, transfer it into two plates, each Agar plate containing about 200 μ L, 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, slightly aerobic
Storage conditions	2-8 ℃
Safety level	1
morphology	Size: 0.5-1mm Shape: Circular Edge: Neat Transparency: Opaque Color: Milky White Rise Degree: Middle Rise Surface: Bright and Smooth Texture: Wet and Thick
Sharing mode	Public welfare sharing

Lactobacillus delbrueckii subsp.

storage conditions : 2~8 ℃

No. : 133039

product form : freeze dried,200ul

Validity: 6 years

Biosafety level: 1, handle in ultra-clear table or safety cabinet

Receiving notice: if any abnormality is found on the day of receipt, please contact the customer service within 24 hours. If it is overdue, it is deemed that the bacteria are well. The freeze dried culture shall be used up once and shall not be retained. The bacterial viability will resume after 1-2 generation of recovery and can be used normally. Handling instructions of agar slant and suspension liquid is enclosed. Please operate in strict accordance with this instruction, otherwise the replacement of bacteria are not be available in case of aberrant growth and loss of viability.

Growthconditions :37 ℃, micro aerobic, MRS medium, 48-72h. MRS medium: peptone 10.0g, beef paste 10.0g, 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 0.04g, Tween 80 1.0g, agar 20.0g (not included in liquid medium), distilled water 1.0L. pH 5.7±0.2. Sterilization at 121 ℃ for 15min.

Recovery steps:

①Prepare a φ18mm test tube of 10ml liquid medium ;

②Sterilizing the ampoule, open it in biosafety cabinet, heat the tip of ampoule in a flame, quickly drop sterile water to creak it, then break it with forceps;

③Draw 0.5mL of liquid culture medium into the freeze dried ampoule, fully rehydrate and transfer the solution to the liquid test tube, mix evenly;

④Put the test tube under the above culture conditions for cultivation. The culture solution is obviously turbid or mass growth at the solution bottom occur, this indicates the bacterial grows well.

Recovery record: According to the recovery instructions, the results of the recovery are reported as follows:

item	test result
viability	good viability, in 48-72h the liquid medium become turbid, and the plate strain is weak.
Colony morphology: (pictured above)	Lactobacillus delericus subsp., Gram-positive bacilli, MRS liquid culture bacterial liquid is turbid, plate growth is weak, it is recommended to use liquid body culture.
Conclusion:	good viability, no abnormal colony morphology, qualified

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