The last of the salad slides, I promise :P This plate is selective for Shigella bacteria, which grow with a brownish red color - in other words that creeping stuff all over the plate XD For more information on Shigella, go here: http://www.cdc.gov/ncidod/dbmd/dise.....gellosis_g.htm

The moral of these experiments? Stick to tubes of cookie dough - we found them to be free of everything but the Staph aureus :D