Streptococcus thermophilus|185997 |BNCC

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Streptococcus thermophilus

Subculture procedure	① Prepare 2 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 pour it into the freeze-drying tube. After fully dissolving, mix well; ④ Transfer 0.2mL of bacterial suspension into a Agar plate, apply evenly, and repeat twice to obtain two plates; ⑤ Place all the plates under the above cultivation conditions, and once the strains grow, they can be used.
Growth conditions	37 ℃; 24-48 hours; aerobic;
Storage conditions	2-8 ℃
Safety level	1
morphology	The colony diameter is 1-2mm, circular, with neat edges, opaque, gray white front, smooth surface, bright surface, moist texture, easy to pick up, G+(blue purple), cocci, purity: pure
Sharing mode	Public welfare sharing

Streptococcus thermophilus

Storage conditions: 2~8 ℃

No. 185997

Product format: freeze dried,200ul

Validity period: 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 plate 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.

Growth conditions: 30℃, aerobic, Columbia blood plate (ready-to-use), 18-24h.

Recovery steps:

①Prepare 1-2 of above mentioned plates;

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

③Draw 0.5ml of sterile water into the freeze dried ampoule, make it fully dissolved, and distribute the solution to the plates well in 200ul/plate;

④Put the plates under the above culture conditions for cultivation 5-7days.

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

Item	test results
viability:	good viability，in 20 hours strain layer become obvious, colony is typical
colony morphology: (above)	size: 0.5-1mm ; Edge: neat ; Transparency: opaque color: white ; Protuberance: middle bulge & nbsp; & nbsp; Surface: bright and smooth ; Texture: moist and easy to stir
Conclusion:	good viability, no abnormal colony morphology, qualified

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