Serratia marcescens|BNCC138601 |BNCC

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Serratia marcescens

Culture medium	Nutritional gravy medium (NA/NB): beef paste 3.0g, peptone 10.0g,NaCl 5.0g, agar 20.0g (not included in liquid medium), distilled water 1.0L,pH 7.0. Sterilization at 121 ℃ for 15min. [Note] Adding 5 mg MnSO4 · H2O when culturing Bacillus. it is beneficial to produce spores.
Subculture procedure	(1) Prepare a test tube containing 5~10mL of liquid medium and 2 plates; (2) Open it in the safety 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 culture medium into a freeze dried ampoule, fully rehydrate and transfer the solution to the liquid test tube, mix evenly; (4) inoculate a plate with 0.2mL of suspension liquid, repeat the step to obtain two plates; ⑤ Put all the liquid test tubes and plates under the above culture conditions for cultivation, and the strains can be used when they grow.
Growth conditions	26 ℃;18-24h; Aerobic;
Storage conditions	2-8 ℃
morphology	Colony diameter is 1-2mm, round, irregular edge, opaque, pale yellow on the front, convex in the middle, bright and smooth surface, moist and viscous texture, producing red pigment, G-(red), bacilli, purity: pure
application	Detection of the retention effect of filter membrane (0.45 μm) on bacteria, GB 4789.43-2016 determination of antibacterial activity of microbial enzyme preparations, "General Hygienic Standard for Enzyme Preparations for Food Processing-Antibacterial Activity Test" standard strain
Sharing mode	Public welfare sharing

Serratia marcescens

Storage conditions: 2~8 ℃

No. 138601

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 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.

Growth conditions:26 ℃, aerobic, nutrient agar medium, 18-24h. 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,pH 7.0. Sterilization at 121 ℃ for 15min.

Recovery steps:
(1)Prepare a test tube containing 5-10mL of liquid culture medium and 2 plates;
(2)Open the ampoule in the 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 culture medium into a freeze dried ampoule, fully rehydrate and transfer the solution to the liquid test tube, mix evenly;
(4)Inoculate a plate with 0.2mL of suspension liquid, repeat the step to obtain two plates;
(5)Put all the liquid test tubes and plates under the above culture conditions for cultivation, and the strains can be used when they grow.

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

item	test results
viability:	good viability,in 24h, plate bacteria layer is obvious; Scribed plate, typical colony, late production of red pigment.
colony morphology: (above)	size: 1-2mm ; Shape: round ; Edge: neat ; Transparency: opaque color: off-white ; Protuberance: middle bulge ; Surface: bright and smooth ; Texture: moist and viscous
Conclusion:	good viability, no abnormal colony morphology, qualified