New Medium Determines Source of Urinary Tract Infection

The background is clear, allowing easy match-up between sample and identification on multiple-sample plates. This reduces the need for subculturing and further lengthy identification procedures, even when more than one species is present in the sample.

The medium, called Clear Chromogenic UTI Medium, contains two specific chromogen substrates. One is cleaved by beta-glucosidase in enterococci, resulting in blue colonies, and the other is cleaved by beta-galactosidase in E coli, resulting in pink colonies. Since coliforms have the ability to cleave both chromogens, they produce purple colonies. In addition, tryptophan in the medium allows for the detection of TDA activity, causing such colonies to be brown, while Staphylococcus aureus colonies retain their typical appearance. The medium is the product of Oxoid (Basingstoke, UK).




Related Links:
Oxoid