Thermo Fisher, R211348, Enterococcus/Group A Strep Screen

Quantity: 50 Tests/Kit
Unit Size: Each
Presumptively identify Group A Streptococci and Enterococci using Enterococcus/Group A Strep Screen.
• Easy to store- No special storage required
• Easy to interpret- With visual inspection - the color change in the medium to dark brown indicates a positive esculin reaction and after addition of two drops of Cinnamaldehyde Reagent to the tube, the color changes to red indicating a positive PYR test.This medium contains esculin compound which is hydrolyzed enzymatically at the β-glucose linkage to yield two products – esculetin and glucose. Esculetin reacts with the ferric ammonium citrate present in the medium to form a phenolic iron complex which is brown-black in color.L-pyroglutamic acid β-naphthylamide (PYR) serves as the substrate for the detection of pyrrolidonyl peptidase. Following substrate hydrolysis by the peptidase enzyme, the resulting β-naphthylamine produces a red color upon the addition of ρ-dimethyl-aminocinnamaldehyde (Cinnamaldehyde Reagent).