Escherichia coli (Migula) Castellani and Chalmers|BNCC316872 |BNCC

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Escherichia coli (Migula) Castellani and Chalmers

Culture medium	Nutritional agar-AMP medium (NA-4): nutrient 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. At 50 ℃, the prepared AMP solution was aseptically added with a final concentration of 100.0 mg/ml.
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	37°C, aerobic, 18-24h
Storage conditions	2-8 ℃
morphology	The colony diameter is 1-2mm, round, with neat edges, opaque, gray-white on the front, gray-white on the back, convex in the middle, smooth and bright surface, moist texture, easy to stir up, G-(red), bacilli, purity: pure
Separation substrate	Canine, Tennessee
application	Assay of lactam antibiotics beta-lactam antibiotics Evaluation of Mueller-Hinton agar Quality control strain Susceptibility disc testing Susceptibility testing Quality control strain for API, bioMerieux Vitek and Sensititre products
Sharing mode	Public welfare sharing

Description

1. Name : Escherichia coli

2. BNCC No.: 316872

3. Biosafety level: 4

2. Storage conditions:

Storage of freezed dried ampoule and agar slant at 2°C to 8°C

3. Growth Conditions

1. Nutrient agar medium: beef paste 3.0g, peptone 10.0g,NaCl 5.0g, agar 20.0g (without liquid medium), distilled water 1.0L,pH 7.0. Sterilization at 121 ℃ for 15min.

2. Atmosphere: aerobic

3. Temperature: 37 ℃

4. Notes:
1.Normal culturing time, 24-48hours for bacterial, 72 hours for yeast, 5-7days for mould, 7-10days for fungal.

2.Agar slant shall be inoculated asap, and do not keep the storage for more than 3 months.

3.Please recover the strains in strict accordance with this instruction, otherwise the replacement of the strain are not be available in case of viability loss caused by different media or growth conditions.

4.Waste generated from the handling process should be discarded after high-pressure sterilization