Staphylococcus epidermidis

No. : 353768

Product format: tablets in penicillin bottle

Storage conditions : -20 ℃

Biosafety level :  1

Validity period: 5 years

Use : pharmacopoeia, national standard and other control quality control strains

Receiving notice: if any abnormality is found on the day of receipt, please contact the customer service within 24 hours. The bacterial tablets shall be used up once and shall not be retained once the penicillin bottled is opened. Keep it at -20℃ for storage if it is not used.  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.

Medium : nutrition gravy medium beef paste 3.0g, peptone 10.0g,NaCl 5.0g, agar 20.0g (without liquid medium), distilled water 1.0L,pH7.0. Sterilization at 121 ℃ for 15min. [Note] Add 5mg MnSO4·H2O when culturing Bacillus,which is beneficial to spore production.

Recovery steps:

(1)Prepare a sterile test tube of 5~10ml liquid medium and 2 pieces of 90mm agar plates;  
(2)Sterilizing of the ampoule, under aseptic conditions, remove the cap and take out the inner vial. lift the cotton plug, rehydrate the pellets by drawing 0.5ml of liquid culture medium into the vial.
(3)Fully dissolved, transfer the solution to the liquid test tube, mix evenly; 
(4)Inoculate a plate with the solution, distribute it well in 200ul/ plate; the plates are not allowed to seal by wrapping. 
(5)Put all the plates and test tubes under the above culture conditions for cultivation, The culture solution is obviously turbid after 18-24 hours, and this indicates the bacterial grow well.
(6)If the strain does not grow, it should be continued to be cultured for 72h, and then used 

Growth conditions temperature: 37 ℃  Gas environment: aerobic Time: 18-24h;