Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Selective & Differential Media for Citrobacter

Product #

Description

Synonym

Application

Add to Cart

16016 BRILA MUG Broth for microbiology   In the detection of E. coli and coliforms. Bile and brilliant green extensively inhibit the growth of accompanying flora, in particular gram-positive microorganisms. The presence of E. coli results in fluorescence in the UV. A positive indole test and possibly gas formation from lactose fermentation provide confirmation.
The broth can be used in conjunction with the MPN method for E. coli and coliform enumeration in the water of bathing areas.
81938 Coliform ChromoSelect Agar for microbiology Coliform Agar ChromoSelect HiCrome Coliform Agar is a selective chromogenic medium recommended for simultaneous detection of Escherichia coli and total coliforms in water and food samples.
85927 ECC ChromoSelect Selective Agar for microbiology E. coli-Coliform Selective Agar ChromoSelect ECC Selective Agar ChromoSelect HiCrome ECC Selective Agar is a selective medium recommended for the simultaneous detection of Escherichia coli and coliforms in water and food samples. The ingredients help even the sublethally injured coliforms to grow rapidly, Tergitol inhibits Gram-positive as well as some Gram-negative bacteria other than coliforms. The chromogenic mixture contains two chromogenic substrates as Salmon-GAL and X-glucuronide. The enzyme β-D-galactosidase produced by coliforms cleaves Salmon-GAL, resulting in the salmon-to-red coloration of coliform colonies. The enzyme β-D-glucuronidase produced by E. coli, cleaves X-glucuronide. E. coli forms dark blue-to-violet colored colonies due to cleavage of both Salmon-GAL and X-glucuronide. The addition of tryptophan improves the indole reaction. To confirm E. coli, add a drop of Kovac′s reagent (Catalog No. 60983) on the dark blue-to-violet colony. Formation of cherry-red color indicates the positive reaction.
54232 Lactose TTC Agar with Tergitol-7 for microbiology TTC-Tergitol-7 Agar m-Tergitol-7 Agar with Meat Extract  
16377 MacConkey Broth Purple for microbiology MacConkey Bromocresol purple Broth MacConkey G Broth MacConkey Broth Purple is a differential medium used for the detection of coliforms in water samples and milk examination by MPN technique. It is a modification of the classic medium, where neutral red is replaced by a less aggressive indicator, according European Pharmacopoeia. It is also recommended by ISO Committee under the specification ISO 9308-2:1990.
84368 Salmonella Agar according to Oenöz for microbiology OENOEZ Agar For the cultivation of Salmonella acc. to Oenöz (1986).
70189 Violet Red Bile Glucose Agar for microbiology VRBG-Agar A selective medium for the isolation and enumeration of enterobacteria.
76721 XLT4 Agar (Base) for microbiology Xylose Lysine Tergitol-4 Agar (Base) A selective medium for the isolation and identification of pathogenic Enterobacteriaceae, especially Salmonella spp, according to Miller and Tate (1990).