B1222 

MAC CONKEY AGAR MEDIUM

Formula

Ingredients 

gm/lit.

Peptic digest of animal tissue 

Lactose 

Bile Salt 

Sodium chloride 

Neutral red 

Agar 

20.00

10.00

5.00

5.00

0.07

15.30

Final pH (at 25°C) : 7.4 + 0.2

Directions 

Suspend 55.37 gm. in 1000ml. distilled water. Heat to boil to dissolve the medium completely. Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes. AVOID OVERHEATING. Cool to 40-50 c and pour into sterile petri plates. Surface of medium should be dry when inoculated.

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