M |
| MacConkey Agar No.3 |
| MacConkey Agar with Salt |
| MacConkey Agar without Salt & Crystal Violet |
| MacConkey Broth (USP) |
| Malt Extract |
| Malt Extract Agar |
| Malt Extract Broth |
| Mannitol Salt Agar |
| Maximum Recovery Diluent (MRD) |
| Meat Extract |
| Meat Peptone |
| Membrane Lauryl Sulphate Broth |
| Mueller Hinton Agar |
| Muller-Kauffmann Tetrathionate Broth (MKTTn) |
| Mycological Agar |
