Blood Agar Base No. 2 (Powder)

Directions per Liter:

Dissolve 42grams per liter of distilled/deionized water, heating to boiling with stirring until completely solubilized. Dispense into appropriate containers, loosen caps and autoclave for 15-30 minutes at 121ºC (15 psi). Prepare 5 to 10% blood agar by adding the appropriate volume of sterile defibrinated blood to melted sterile agar medium. Cool to 45-50°C. Dispense into Petri dishes or tubes.


Component g/liter
Casein Digest Peptone 7.5
Liver Digest 5
Peptic Digest of Animal Tissue 7.5
Sodium Chloride 5
Yeast Extract 5
Agar 12
Total: 42g/Liter


Storage and Stability:

Store powdered media at RT. Opened bottles should be capped tightly and kept in a dark, low humidity environment. Prepared media should be kept at 4°C and used within a short period of time.