MacConkey Agar No. 3 (+ Salt and Crystal Violet), 90mm Plate

MacConkey Agar No. 3 is used for the cultivation of Enterobacteriaceae and is not intended for use in the diagnosis of disease or other conditions in humans. A modification recommended by the W.H.O. and the American Public Health Association for the isolation of Enterobacteriaceae from waters and sewage. The medium has been made more selective than MacConkey’s original formula by the use of crystal violet as well as bile salts. Gram positive organisms will not grow on this medium.


Container 90mm Plate
Pack Size 10
Shelf Life 12 weeks
Storage Temp 2-8oC
Appearance Transparent, pale red gel
Recommended Incubation 37oC
pH 7.1 +/-0.2
Fill Volume 18ml

Quality Control

Organisms Ref. No Result
Escherichia coli ATCC 8739 NCIB 8545 >50% growth compared to control plate, pink colonies
Pseudomonas aeruginosa ATCC 27853 NCTC 12934 >50% growth compared to control plate
Salmonella typhimurium ATCC 14028 NCTC 12023 >50% growth compared to control plate
Enterococcus faecalis ATCC 19433 NCTC 775 Total inhibition of >1000cfu inoculum
Staphylococcus aureus ATCC 6538 NCTC 10788 Total inhibition of >1000cfu inoculum

Supporting Documents

MSDS Download
Technical Data Sheet Download



SKU: 8071SCV