Todd-Hewitt Broth (Dehydrated)
Todd-Hewitt Broth (Dehydrated)
Thermo Scientific™

Todd-Hewitt Broth (Dehydrated)

Prepare antigenic streptococcal hemolysin and cultivate the streptococci prior to serological groupings with this medium.
Have Questions?
Catalog NumberQuantity
CM0189B500 g
Catalog number CM0189B
Price (USD)
-
Request A Quote
Quantity:
500 g

Prepare antigenic streptococcal hemolysin and cultivate the streptococci prior to serological groupings with Thermo Scientific™ Oxoid™ Todd-Hewitt Broth (Dehydrated). Todd-Hewitt Broth is an easily reconstituted, dehydrated modification of the medium originally described by Todd and Hewitt1 for the production of antigenic streptococcal haemolysin.

Streptococci are facultatively anaerobic, catalase-negative, gram-positive cocci that occur as pairs or chains. They cause a wide variety of clinical diseases including pharyngitis, scarlet fever, otitis media, impetigo, meningitis, neonatal sepsis, pneumonia, endocarditis, osteomyelitis, and necrotizing fasciitis. One of the most useful phenotypic characteristics of streptococci is the hemolytic reaction, generally classified as alpha, beta or gamma according to the appearance of zones around colonies growing on Blood Agar.

Todd Hewitt Broth is recommended for the cultivation of group A haemolytic streptococci used for serological studies.

  • Well-buffered: the medium is well buffered by sodium phosphate and sodium carbonate to neutralize the acid produced during glucose fermentation.
  • Todd-Hewitt Broth can be employed as an alternative to serum broth or horse-flesh digest broth, for the cultivation of streptococci prior to serological grouping2.

Not all products are available for sale in all territories. Please inquire.

Remel™ and Oxoid™ products are now part of the Thermo Scientific brand.

For Laboratory Use Only

General References:

  1. Todd E. W. and Hewitt L. F. (1932) J. Path. Bact. 35(1). 973-974.
  2. Finegold S. M. and Martin W. J. (1982) Diagnostic Microbiology. C. V. Mosby Co. St. Louis. USA. p. 645.
Specifications
DescriptionTodd-Hewitt Broth
Quantity500 g
YieldFor 13.7L medium
FormPowder
Product TypeDehydrated Culture Media
Unit SizeEach

Intended use statement 

A medium for the cultivation of Streptococci prior to serological grouping.

Documents & Downloads

Certificates

Safety Data Sheets

Share catalog number, name or link

1x1 image pixel for data collection