Food&Water Q.C.

For detection and enumeration
of E.coli in food and water samples.

Typical Appearance of microrganisms

E.coli → blue
Other gram negative bacteria→ colourless
Gram positive → inhibited

For the simultaneous detection and enumeration of E.coli and other coliforms
in food or water samples.  

Typical Appearance of microrganisms

E.coli → Blue
Other Coliforms → Mauve 
Other bacteria → Colourless or inhibited.

For detection and isolation of Salmonella spp.
in clinical and food samples.

Typical Appearance of microrganisms

Salmonella → red
Many Coliforms → blue, violet
Proteus, etc. → colourless

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

Typical Appearance of microrganisms

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

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