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MacConkey Agar No. 3 (Dehydrated)
Catalog number: CM0115B
Thermo Scientific™
MacConkey Agar No. 3 (Dehydrated)
Catalog number: CM0115B
Detect and enumerate coliform organisms, including Escherichia coli, while isolating and detecting Salmonella and Shigella spp. in both clinical and food specimens using Thermo Scientific™ Oxoid™ MacConkey Agar No.3. A modification of the original MacConkey medium by the addition of selected bile salts, the medium gives improved differentiation of coliforms and non-lactose fermenting organisms while completely inhibiting Gram-positive cocci.
| Description | MacConkey Agar No. 3 (U.S. formulation) |
| Format | Powder |
| Product Type | Agar |
| Type | Media |
| Quantity | 500 g |
| Yield | For 9.7L medium |
| Unit Size | Each |
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Use MacConkey Agar No. 3 for detection and enumeration of coliform organisms while isolating and detecting Salmonella and Shigella spp. in pathological and food specimens.
- Selective and differential: due to the inclusion of a specially prepared fraction of bile salts in addition to crystal violet, the medium gives improved differentiation between coliforms and non-lactose fermenting organisms while Gram-positive cocci are completely inhibited.
- Easy-to-read: Escherichia coli (red colonies with bile precipitation) is easy to differentiate from Shigella spp. (straw coloured colonies) and Salmonella (Straw coloured colonies).
- Recommended by the American Public Health Association 1
MacConkey Agar No.3 formulation corresponds with that recommended by the American Public Health Association1 for the direct plating of water samples for coliform bacilli, for the examination of food samples for food poisoning organisms2 and for the isolation of Salmonella and Shigella species in cheese3.
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For In Vitro Diagnostic Use.
1. American Public Health Association (1998) Standard Methods for the Examination of Water and Wastewater. 20th Edn. APHA Inc. Washington DC.
2. American Public Health Association (1976) Compendium of methods for the Microbiological Examination of Foods. APHA Inc. Washington DC.
3. American Public Health Association (1978) Standard Methods for the Examination of Dairy Products. 14th Edn. APHA Inc. Washington DC