Learn More
Thermo Scientific™ Nocardia Quad
Description
Differentiate aerobic actinomycetes on the basis of hydrolysis of casein, xanthine, tyrosine, and starch using Nocardia Quad.
Differentiate aerobic actinomycetes by hydrolysis of casein, xanthine, tyrosine, and starch with Thermo Scientific™ Remel™ Nocardia Quad. A taxonomic scheme to differentiate these genera based on biochemical characteristics was developed by Mishra et al1. McGinnis et al. simplified it to identify the most commonly isolated actinomycetes by including tests for casein, xanthine, and tyrosine degradation2. Starch is added to Nutrient Agar to presumptively differentiate Streptomyces from Nocardia based on the inability of Nocardia species to hydrolyze starch3.
The aerobic actinomycetes as a group are gram-positive, catalase-positive bacteria that may be presumptively identified by staining properties, microscopic morphology, and substrate degradation. Certain actinomycetes produce a hydrolytic enzyme that degrades the skim milk in Casein Agar, which is demonstrated by clearing of the agar surrounding the area of growth.
- Ready to use – Solid media
- Convenient – Quad plate format
- Space saving – Read more results from a single sample and produce more diagnostic details while reducing storage capacity issues in the incubator with a quad-plate that includes four separate media formulations
- Easy to interpret –
- Casein Agar (I)
- Positive Test – Clearing of casein agar around and/or under growth
- Negative Test – Growth with no clearing of the medium
- Xanthine Agar (II)
- Positive Test – Clearing of xanthine agar around and/or under growth
- Negative Test – Growth with no clearing of the medium
- Tyrosine Agar (III)
- Positive Test – Clearing of tyrosine agar around and/or under growth
- Negative Test – Growth with no clearing of the medium
- Starch Agar (IV)
- Positive Test – No color development surrounding growth
- Negative Test - Purple color development surrounding growth
- Casein Agar (I)
Casein agar contains skim milk that acts as a substrate for the hydrolytic enzyme produced by some actinomycetes.
Xanthine and Tyrosine Agars contain beef extract that provides carbohydrates, vitamins, nitrogen compounds, and salts. The peptones present in these media provide nutrients in the form of amino acids and peptides.
Starch Agar contains potato starch which acts as a substrate to detect amylase production. This is demonstrated by clearing of the agar surrounding the area of growth, and easily detected upon addition of Gram Iodine or Lugol’s iodine.
Not all products are available for sale in all territories. Please inquire.
Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.
Specifications
Specifications
| Description | Nocardia Quad |
| Format | Quadplate |
| Product Type | Agar |
| Quantity | 10/Pk. |
Your input is important to us. Please complete this form to provide feedback related to the content on this product.