|Product Code||Description||Product Size||Quantity|
|CM0189B||TODD-HEWITT BROTH 500g||–||500g|
Todd-Hewitt Broth 500g
Thermo ScientificTM OxoidTM
Oxoid Todd-Hewitt Broth is used for cultivation of Streptococci prior to serological grouping.
Todd-Hewitt Broth, Oxoid Composition
|Infusion from 450 g fat-free minced meat|
|pH 7.8 ± 0.2 @ 25°C|
Todd-Hewitt Broth, Oxoid Preparation:
Dissolve 36.4 g in 1 litre of distilled water. Mix well, distribute into containers and sterilise by autoclaving at 115°C for 10 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.
Streptococcus species grown in Todd-Hewitt Broth and harvested as antigens to raise antibodies, will sometimes carry antigenic material from the broth. This problem must be looked for in the antisera. If detected it would be preferable to use another medium to grow the test streptococci.