MacCONKEY AGAR

MacConkey Agar is recommended for isolation, identification and enumeration of Staphylococcus aureus and Faecal Streptococci. MacConkey Agar is the earliest selective and differential medium for cultivation of enteric microorganisms from a variety of clinical specimens. Subsequently MacConkey Agar and Broth have been recommended for use in microbiological examination of foodstuffs and for direct plating / inoculation of water samples for coliform counts. These media are also accepted by the Standard Methods for the Examination of Milk and Dairy Products and pharmaceutical preparations.
Lactose non-fermenting strains, such as Shigella and Salmonella are colourless and transparent and typically do not alter appearance of the medium. Yersinia enterocolitica may appear as small, non-lactose fermenting colonies after incubation at room temperature. Bacteria causing food poisoning are also isolated on MacConkey Agar, such as Staphylococcus aureus and Faecal Streptococci.

for cultivation and di?erentiation of enteric bacteria and gram-positive microorganisms from clinical samples especially Enterococcus faecalis within 18 hours