Yeast Extract (Powder) 500g
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Thermo ScientificTM OxoidTM
Oxoid Yeast Extract Powder is a dried yeast autolysate which provides a nutritious source of nitrogen and vitamins.
- Recommended for plate count of organisms in water
- Increases yield of organisms of many media or fermentation broths
Yeast Extract Agar 500g, Oxoid
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Thermo ScientificTM OxoidTM
Carry out plate counts of microorganisms in water with Thermo Scientific™ Oxoid™ Yeast Extract Agar (Dehydrated). Yeast Extract Agar is made to the formula described by Windle Taylor for the plate count of microorganisms in water and is tested in accordance with ISO 1133:2014. It is a rich, nutritious medium for the recovery of a wide range of bacteria, yeast, and molds.
Yeast Extract Agar, Oxoid Composition
| Typical Formula* | gm/litre |
| Yeast extract | 3.0 |
| Peptone | 5.0 |
| Agar | 15.0 |
| pH 7.2 ± 0.2 @ 25°C |
Yeast Extract Agar, Oxoid Preparation:
Suspend 23g in 1 litre of distilled water. Bring to the boil to dissolve completely. Sterilise by autoclaving at 121°C for 15 minutes.
Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label.
Store the prepared medium at 2-8°C.
Yersinia Selective Agar Base 500g
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Thermo ScientificTM OxoidTM
- Oxoid Yersinia Selective Agar Base (Schiemann’s CIN Agar) is used for the isolation and enumeration of Yersinia enterocolitica from clinical specimens and foods.
- Also available Yersinia Selective Supplement, Part No. SR0109E. Industrial Reference: FDA.
Yersinia Selective Agar Base, Oxoid Composition
| Typical Formula* | gm/litre |
| Special peptone | 20.0 |
| Yeast extract | 2.0 |
| Mannitol | 20.0 |
| Sodium pyruvate | 2.0 |
| Sodium chloride | 1.0 |
| Magnesium sulphate | 0.01 |
| Sodium desoxycholate | 0.5 |
| Neutral red | 0.03 |
| Crystal violet | 0.001 |
| Agar | 12.5 |
| pH 7.4 ± 0.2 @ 25°C |
Yersinia Selective Agar, Oxoid Preparation:
Suspend 29g in 500ml of distilled water and bring gently to the boil to dissolve completely. Sterilise by autoclaving at 121°C for 15 minutes. Allow to cool to approximately 50°C and aseptically add the contents of one vial of Yersinia Selective Supplement SR0109 reconstituted as directed in the instructions for use that accompany the product. Mix gently and pour into sterile Petri dishes.
Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label.
Store the prepared medium at 2-8°C for not more than 24 hours.
Precautions
Some strains of Yersinia enterocolitica may grow poorly or not at all. Other species of Yersinia may grow along with some enteric organisms. It is therefore essential that full identification tests are carried out on suspect colonies.
Yersinia Selective Supplement 1 x 10 Vials
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Thermo ScientificTM OxoidTM
Oxoid Yersinia Selective Supplement is used for the isolation of Yersinia enterocolitica.
- Add to Yersinia Selective Agar Base, Part No. CM0653B
- Each vial supplements 500mL of medium
Yersinia Selective Supplement, Oxoid Composition
| Vial contents (each vial is sufficient for 500 ml of medium) | per vial | per litre |
| Cefsulodin | 7.5mg | 15mg |
| Irgasan | 2.0mg | 4.0mg |
| Novobiocin | 1.25mg | 2.5mg |
Yersinia Selective Agar, Oxoid Preparation:
Suspend 29g in 500ml of distilled water and bring gently to the boil to dissolve completely. Sterilise by autoclaving at 121°C for 15 minutes. Allow to cool to approximately 50°C and aseptically add the contents of one vial of Yersinia Selective Supplement SR0109 reconstituted as directed in the instructions for use that accompany the product. Mix gently and pour into sterile Petri dishes.
Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label.
Store the prepared medium at 2-8°C for not more than 24 hours.
Precautions
Some strains of Yersinia enterocolitica may grow poorly or not at all. Other species of Yersinia may grow along with some enteric organisms. It is therefore essential that full identification tests are carried out on suspect colonies.
