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Campylobacter Selective Agar Preston Supplement This is one of several selective media available for the isolation of Campylobacter spp in clinical, food and environmental laboratories. The medium is enriched with Lysed Horse Blood and made selective by the inclusion of Cefoperazone, to suppress other enteric organisms, and Amphotericin to suppress yeast & fungal growth. -
Campylobacter Selective (Skirrow) Agar This is one of several selective media available for the isolation of Campylobacter spp in clinical, food and environmental laboratories. Based on Columbia Agar enriched with Lysed Horse Blood. Polymyxin B, Trimethoprim & Vancomycin are added as the selective agents. Sodium Thiosulphate, Pyruvic Acid and Ferrous Sulphate are also included to enhance the aerotolerance of Campylobacter spp. NB: This medium should be incubated at 42°C to optimise selectivity. -
Chromogenic medium for detection of Clostridium difficile. Clostridium difficile (C.difficile) is the leading cause of nosocomial infectious diarrheoa in adults. These infections occur mostly in patients who have both medical care and antibiotic treatment and have become more frequent and more difficult to treat in the last years due to the emergence of highly toxigenic C.difficile strains. Although PCR has become the leading C.difficile detection technique, culture is essential for strain typing and antimicrobial susceptibility testing. CHROMagarTM C.difficile is a new fluorogenic culture medium, extremely sensitive and selective, especially designed to simplify and speed up (24h) the culture of C.difficile. -
Recent developments in culture media have given rise to the use of chromogenic substrates as a means of differentiating bacteria. This is one such medium and is a selective medium for the isolation and presumptive identification of Listeria monocytogenes from clinical and food samples. The medium is made selective by the inclusion of Lithium chloride, Ceftazidime, Polymixin B, Nalidixic acid (to suppress other bacteria) and Amphotericin B (to suppress yeasts and fungi). With the combination of both the chromogenic substrate and phospholipase C enzyme reactions, it is possible to differentiate L.monocytogenes from other Listeria spp. Users should be aware that some strains of L.ivanovii are capable of producing an opaque halo, highlighting the need to confirm presumptively identified colonies. -
Colorex™ Salmonella Plus is a chromogenic media for the isolation and presumptive identification of Salmonella spp, S typhi, S.paratyphi and lactose positive Salmonella from foodstuffs. Any presumptive Salmonella spp. will produce a mauve colouration; other organisms will be blue or colourless in appearance. Cefsulodin is added as a selective agent to inhibit the growth of Pseudomonas and Aeromonas species. Any presumptive isolates must be confirmed using serological and biochemical techniques available to the laboratory. This product meets the requirements of ISO 6579:2002 standard. -
This is a chromogenic medium for the isolation and presumptive identification of Staphylococcus aureus. Mauve colonies indicate Staph aureus following incubation (18 – 24 hours) at 37°C, other organisms, if not inhibited, are indicated by blue or colourless colonies. Studies have suggested that this media has a specificity and sensitivity of 99.4% and 95.5% respectively (Gaillot et al 2000). -
A very nutritious general-purpose medium based on Columbia Agar Base enriched with 5% Sheep Blood, suitable for the isolation of most organisms including most fastidious anaerobes of clinical significance. Many workers claim that β-haemolysis is more readily apparent, particularly in group A streptococci, when Sheep Blood is used in place of Horse Blood. -
Dichloran Rose-Bengal Chloramphenicol (DRBC) Agar Dichloran Rose Bengal Chloramphenicol Agar is based on the formulation described by King et al. It is a selective medium for the isolation and enumeration of yeasts and mould that are of significance in food spoilage. The medium is a modification to Rose Bengal Chloramphenicol Agar and is recommended by the International Standard ISO 21527:2008 part 1.
