89747
Tinsdale Agar Base
NutriSelect® Plus, suitable for microbiology
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About This Item
UNSPSC Code:
41171606
NACRES:
NA.85
Recommended Products
sterility
non-sterile
Quality Level
form
powder
shelf life
limited shelf life, expiry date on the label
composition
agar, 15 g/L
L-cystine, 0.24 g/L
peptic digest of animal tissue, 20 g/L
sodium chloride, 5 g/L
sodium thiosulfate, 0.43 g/L
manufacturer/tradename
NutriSelect® Plus
technique(s)
microbiological culture: suitable
application(s)
clinical testing
environmental
food and beverages
veterinary
microbiology
suitability
selective and differential for Corynebacterium spp.
Related Categories
Application
Tinsdale Agar is used for the primary isolation and identification of Corynebacterium diptheriae.
The medium differentiates between C. diphtheriae and the diphtheroids found in the upper respiratory tract. This differentiation was based on the ability of C. diphtheriae to produce grayish-black colonies, surrounded by a brown/black halo. Diphtheroids do not have this ability. The dark halo is due to the production of H2S from cystine and sodium thiosulfate, interacting with the tellurite salt.
The medium differentiates between C. diphtheriae and the diphtheroids found in the upper respiratory tract. This differentiation was based on the ability of C. diphtheriae to produce grayish-black colonies, surrounded by a brown/black halo. Diphtheroids do not have this ability. The dark halo is due to the production of H2S from cystine and sodium thiosulfate, interacting with the tellurite salt.
Preparation Note
Suspend 40.7g of agar base in 1000ml of distilled water. Bring to the boil and dissolve completely. DO NOT AUTOCLAVE. Allow to cool to 50°C and add aseptically the contents of 1 unit (part A+B) of Tinsdale Supplement (Cat. No. 73831). Mix throughly and pour into sterile dishes.
Footnote
We offer two media types: the superior granulated GranuCult® and the cost-efficient powdered NutriSelect® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.
Legal Information
GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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