Online microbiology notes by SAGAR ARYAL
Introduction MacConkey Sorbitol Agar is based on the formulation described by Rappaport and Henigh. It is selective and differential media for the detection of sorbitol-nonfermenting Escherichia coli serotype O157:H7 associated with hemorrhagic colitis. E. coli serotype O157:H7 is a human pathogen associated with hemorrhagic colitis that results from the action of a Shiga-like toxin (SLT). … Read moreSorbitol MacConkey Agar
MacConkey Agar MacConkey agar was the first solid differential media to be formulated which was developed at 20th century by Alfred Theodore MacConkey. MacConkey Agar is the earliest selective and differential medium for 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. … Read moreMacConkey Agar
– Klebsiella pneumoniae on MacConkey Agar. – Photo By: Angel Beto Gonzalez from Loja, Ecuador. – Lactose positive mucous colonies. – Colonies are about 4 mm in diameter.