the urease test

WHAT WAS THE UREASE TEST ORIGINALLY DESIGNED FOR?  WHAT ORGANISM IS USED TI
DEMONSTRATE A UREASE POSITIVE TEST? WHAT IS THE INDICATOR IN THE UREASE TEST
AND WHY WAS IT USED? WHAT IS THE COLOR OF A POSITIVE TEST AND WHY IS IT THAR
COLOR? WHAT DOES A ORANGE-YELLOW COLOR AT THE END OF 24 HOURS REPRESENT? IF
THIS SAME TUBE PRODUCED A PINK COLOR WHEN LEFT IN THE INCUBATOR FOR AN
ADDITIONAL SIX DAYS WHAT WOULD THIS COLOR CHANGE INDICATE?. WHAT IS THE pH IN A
NEGATIVE UREASE TEST?
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