Streptococcus salivarius|134928 |BNCC

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Streptococcus salivarius

Subculture procedure	① Prepare 1-2 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 and transfer it into a freeze-drying tube. After fully dissolving the bacterial powder, transfer it into a Agar plate at a rate of 200 μ L per piece 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 ℃; 18-24h; aerobic
Storage conditions	2-8 ℃
Safety level	1
morphology	The colonies measure 0.5-1 mm in diameter, are circular with regular margins, and appear opaque. They exhibit a grayish-white coloration on the surface, with a raised center, and are smooth and moist in texture, making them easy to lift. The organisms are Gram-positive (G⁺, appearing blue-violet) and spherical (cocci).
Sharing mode	Public welfare sharing

Streptococcus salivarius

No. : 134928

Product format :freeze dried,200ul

Storage conditions : 2~8 ℃

Validity period : freezed-dried tube for 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. 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.

Recovery/subculture:37 ℃, aerobic, BHI: 4.0g of bovine brain extract powder, 4.0g of bovine heart extract powder, 5.0g of peptone, 16.0g of casein peptone, 5.0g of NaCl, 2.0g of glucose, 2.5g of disodium hydrogen phosphate, pH7.4 ± 0.2. 121 ℃,15min.

Recovery steps:

(1)Prepare a flask of BHI liquid media or two BHI agar plates.

(2)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;

(3)Draw 0.5mL of liquid medium into the freeze dried ampoule,make the strain pellet fully dissolved. transfer the liquid suspension to the liquid media, and culture in plate shaker at 37℃ ; or directly dispense 200ul of the liquid suspension into a BHI agar plate evenly, then put the plates in incubator at 37℃ for 18-24 hours.

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

item	test result
viability	good viability, in 20h BHI bacterial fluid become turbid, BHI plate colony is obvious
colony morphology:	size: smaller color: white shape: round edge: neat edge wet and dry: slightly dry and smooth: smooth and bright transparency: opaque bulge: middle bulge
Conclusion:	good viability, and colony morphology is not abnormal, completely consistent with the above figure, qualified

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