_____ - For Gram-positive and catalase negative cocci, streak a slant of bile esculin agar. _____ - For Gram-positive and catalase negative cocci, perform a CAMP test and test for Taxos A (Bacitracin) ...

Bile Esculin Agar. This is a medium that is both selective and differential. ... The slant of the tube will be red and the color of the butt will remain unchanged (picture on the far right below).