E. coli on MacConkey Agar

MacConkey agar was the first solid differential media to be formulated which was developed in the 20th century by Alfred Theodore MacConkey. MacConkey Agar is the earliest selective and differential medium for the cultivation of coliform organisms. It is used for the isolation and differentiation of non-fastidious gram-negative rods, particularly members of the family Enterobacteriaceae and the genus Pseudomonas. Composition of MacConkey Agar Ingredients Amount Peptone (Pancreatic digest of gelatin)   17 gm Proteose peptone (meat and casein)  3 gm Lactose monohydrate   10 gm Bile salts  1.5 … Read more