Abstract
IN an earlier communication1 a medium was briefly described which had been developed at the Laboratories of the Metropolitan Water Board for the isolation of certain strains of Streptococcus faecalis with a combination of attributes which offered the possibility of distinguishing faecal pollution of predominantly human origin in some climatic regions. Strains which possess the distinctive characteristics of simultaneous high tyrosine decarboxylase activity on a sorbitol substrate and the ability to reduce tetrazolium chloride to formazan may be isolated on the thallous acetate medium which selectively demonstrates the presence of these organisms.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
