U.S. Food & Drug Administration
Center for Food Safety & Applied Nutrition

Bacteriological Analytical Manual Online
January 2001

M2
Acetamide Medium

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Stock basal medium

KH2PO4 0.5 M 14 ml
K2HPO4 0.5 M 6 ml
Agar 0.5 g
Distilled water 400 ml

 

Heat with agitation to dissolve agar. Add 1 ml PR-CV (500X concentrate).

 



Stock acetamide, 1%

Acetamide 1 g
Distilled water 100 ml

Store over CHCl3 in screw-cap container. Stable indefinitely at room temperature.

 


PR-CV (500X concentrate)

Phenol red 2 g
Crystal violet 0.2 g
Distilled water 200 ml

 

Add 5 N NaOH until ingredients are dissolved.

 


Final medium

Add 0.8 ml basal medium to 13 x 100 mm tube. Add 0.2 ml acetamide solution. Steam (100°C) 10 min. Cool.



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


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Hypertext updated by rim/ear/cjm 2005-OCT-21