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BAM Media M5: AE Sporulation Medium, Modified (for C.perfringens)

January 2001

Bacteriological Analytical Manual

M5
AE Sporulation Medium, Modified (for Clostridium perfringens)

Polypeptone10.0 g
Yeast extract10.0 g
Na2HPO44.36 g
KH2PO40.25 g
Ammonium acetate1.5 g
MgSO4·7H2O0.2 g
Distilled water1 liter

 

Dissolve ingredients and adjust to pH 7.5 ± 0.1, using 2 M sodium carbonate. Dispense 15 ml into 20 x 150-mm screw-cap tubes and sterilize by autoclaving for 15 min at 121°C.

After sterilization, add 0.6 ml of sterilized 10% raffinose and 0.2 ml each of filter-sterilized 0.66 M sodium carbonate and 0.32% cobalt chloride (CoCl2·6H2O) dropwise to each tube.

 

Check pH of one or two tubes; it should be 7.8 ± 0.1. Just before use, steam medium for 10 min; after cooling, add 0.2 ml of filter-sterilized 1.5% sodium ascorbate (prepared daily) to each tube.


Original Source: Bacteriological Analytical Manual, 8th Edition, Revision A, 1998.