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E-mail
1034068367@qq.com
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Phone
13439773357
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Address
No. 29 Qingxiang South Road, Daxing District, Beijing
Beijing Punard Technology Co., Ltd
1034068367@qq.com
13439773357
No. 29 Qingxiang South Road, Daxing District, Beijing
CHROMagar™ Komagai, FranceShigella Chromogenic Medium
This medium is used for selective isolation of Shigella.
Packing Specification
Fundamentals of Shigella Chromogenic Culture Medium 64.7g/L
additive 1bottle/L
PH 6.7±0.2(25℃)
Classic formulas can be adjusted or supplemented as needed.
operation
取64.7gDry powder dissolved in970mlDistilled water, mix, stir and boil until fully dissolved, cool to50Keep warm at around ℃ for future use.
use30mlDissolve in distilled water1bottle/LThe additive is thoroughly shaken and dissolved to a light yellow solution, and then used0.45Mmor0.22MmFilter and sterilize with a filter membrane, add sterile culture medium base from the previous step, mix well, and pour onto a plate.
Note: Weigh and add culture medium, additives, etc. according to the proportion. After dissolving and filtering the additives, they can be stored in the dark and refrigerated3A month.
store
Basic dry powder needs to be stored in15-30℃, in a cool and dry environment.
Additives in2-8Store in a dark environment at ℃.
result
After pre culture, take the bacterial growth solution and inoculate it with chromogenic medium,36±1℃ cultivation22±2h.
| Initial screening of microorganisms | Colony color |
| Shigella | white/Clear bacterial colonies, size1-3mm,Surrounding culture medium purple red |
| Salmonella | Yellow colony, surrounding culture medium turns yellow |
| Gas producing Escherichia coli | Blue green colonies, surrounding culture medium turns yellow |
| Escherichia coli | Yellow colony, surrounding culture medium turns yellow |
| Other bacteria | Yellow, blue-green, and other colors may be suppressed |
Note: Supplementary experiments must be conducted to confirm the results.
The used culture medium needs to be121Sterilization at least at ℃20Only minutes are allowed to be discarded according to relevant regulations.