Food&Water Q.C.

For detection and differentiation
of Listeria monocytogenes from
other bacteria in food samples. 

Typical Appearance of microrganisms

L. monocytogenes → blue, diameter less than 3 mm, regular and white halo
Other microorganisms → blue, colourless, other colour, inhibited

For confirmation of L. monocytogenes species
from suspect colonies on CHROMagar^TM Listeria.

Typical Appearance of microrganisms

L. monocytogenes → rose surrounded by a white halo
L. ivanovii → colourless surrounded by a white halo
L. innocua → rose without halo
B. cereus  → colourless with irregular edge (intense halo)

For isolation and detection of V. parahaemolyticus, V. vulnificus and V. cholerae.

Typical Appearance of microrganisms

V. parahaemolyticus → mauve
V. vulnificus/V. cholerae→ green blue to turquoise blue
V. alginolyticus → colourless

For detection and enumeration of Bacillus cereus group

Typical Appearance of microorganisms

Bacillus cereus → blue with white halo  
Other Bacillus → blue, colourless or inhibited

For isolation and direct differentiation
of Staphylococcus spp. in industrial, environmental and veterinary samples

Typical Appearance of microrganisms