Bacillus cereus|132533 |BNCC

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Bacillus cereus

Subculture procedure	① Prepare 1 test tube containing 5–10 mL liquid medium and 2 plates; ② Open in a safety cabinet, cauterize the top with an alcohol lamp, then quickly add sterile water to shatter it; break into pieces with forceps; ③ Pipette 0.5 mL liquid medium into the lyophilized tube, dissolve completely, then return to the liquid test tube and mix thoroughly; ④ Pipette 0.2 mL bacterial suspension onto a Agar plate, spread evenly; repeat twice to obtain two plates; ⑤ Incubate all liquid test tubes and plates under the specified conditions; the strain is ready for use once growth appears.
Growth conditions	30°C, 18-24h, aerobic
Storage conditions	2-8°C
Safety level	2
morphology	Size: 2-4mm Shape: Circular Margins: Irregular Transparency: Opaque Color: Grayish-white Elevation: Flat Surface: Rough and dull Texture: Viscous
Sharing mode	Public welfare sharing

Bacillus cereus

Storage conditions : 2~8 ℃

No. : 132533

Product format : freeze dried,200ul

Validity period : freezed-dried tube 24 months

Biosafety level : 2, handle in biosafety 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 :30°C, aerobic, nutrient agar/gravy medium (NA/NB). Nutritional agar medium: beef paste 3.0g, peptone 10.0g,NaCl 5.0g, agar 20.0g (not included in liquid medium), distilled water 1.0L,pH7.0. 121 ℃,15min.

Recovery steps:

(1)Prepare a flask of NB liquid media or two NA 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℃ (140r/min); or directly dispense 200ul of the liquid suspension into a NA 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 NB bacterial fluid become turbid; The bacterial liquid is marked with NA plate, and the colony is obvious
colony morphology:	Size: Larger Color: Wax White Shape: Round Edge: Neat Edge wet and dry: dry and smooth: rough transparency: opaque uplift: flat
Conclusion:	good viability, and colony morphology is not abnormal, completely consistent with the above figure, qualified.

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