B154 

CYSTINE HEART AGAR

Formula

Ingredients 

gms/lit.

Beef heart infusion from

Proteose peptone 

Dextrose 

Sodium chloride 

L-cystine 

Agar 

500.00

10.00

10.00

5.00

1.00

15.00

Final pH (at 25°C) : 6.8 + 0.2

Directions 

Suspend 51 gms. in 1000 ml. distilled water. Boil to dissolve the medium completely. Sterilize by autoclaving at 15lbs pressure (121°C) for 15 minutes. When to be enriched with haemoglobin, suspend 10.2 gms. in 100 ml distilled water. Sterilize as above. Cool to 50°C and aseptically add 100 ml of 2% sterile haemoglobin solution.Mix well and pour into sterile petri plates.

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