Todd Hewitt HiVeg™ Broth is recommended for cultivation of group A haemolytic Streptococci used for serological studies. This medium is also recommended for selective isolation of group B streptococci with added gentamicin and nalidixic acid. It is an alternative type in epidemiologic studies of group A streptococci as well as pathogenic microorganisms. With the addition of 15 g/l agar, the medium can be solidified and used as an excellent substrate for the production of capsules in streptococci. Todd Hewitt HiVeg™ Broth is prepared by using vegetable peptones in place of animal based peptones which make the media free of BSE/TSE risks.
Application: For Cultivation of Group A Haemolytic : Streptococci used For Serological Studies
- Appearance of powder: Yellow colored, may have slightly greenish tinge, homogeneous, free flowing powder
- Color and Clarity: Medium amber colored, clear solution without any precipitate
- Reaction of 3.7% w/v aqueous solution is pH 7.8 ± 0.2 at 25°C
- Cultural characteristics observed after an incubation at 35 - 37°C for 18 - 48 hours