VRB - VIOLET RED BILE LACTOSE AGAR MERCK 500G
VRB (VIOLET RED BILE LACTOSE) AGAR GRANULADO MERCK 500GR
Mode of Action
Crystal violet and bile salts inhibit growth primarily of the Grampositive accompanying bacterial flora. Degradation of lactose to acid is indicated by the pH indicator neutral red, which changes its colour to red, and by precipitation of bile acids.
Typical Composition (g/litre)
Peptone from meat 7.0;
yeast extract 3.0;
sodium chloride 5.0;
neutral red 0.03;
bile salt mixture 1.5;
crystal voilet 0.002;
Suspend 39.5 g in 1 litre of demin. water and heat to boiling with frequent stirring until completely dissolved. Afterwards do not boil more than 2 minutes.
Do not autoclave. Do not overheat!
pH: 7.4 ± 0.2 at 25 °C.
The prepared medium is clear and dark-red.
Imagem meramente ilustrativa.