Kristensen (gélose lactosée with the green shining and the phenol red)
Use
Insulation of the Salmonella except S . Typhi
Composition
- proteose-peptone 10,0 G
- extracts from yeast 3,0 G
- lactose 10,0 G
- saccharose 10,0 G
- green shining 0,0125 G
- red of phenol 0,08 G
- sodium chloride 5,0 G
- agar 12,0 G
- pH = 6,9
Preparation
50 G per liter. Traditional sterilization.
Reading
The bacteria cultivating on this medium are bacilli with negative Gram. Some are inhibited like Salmonella Typhi.
- the yellow colonies are Lactose + and/or Saccharose +
- the red colonies is Lactose - and Saccharose -.
The bacteria of the kinds Salmonella , Shigella and Proteus are Lactose -, their colonies are thus red.
to see too
- Culture medium
- Culture media (list)
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