| LYP | lactose, yeast, and peptone [agar]; lower yield point |
|---|---|
| MHA | major histocompatibility antigen; May-Hegglin anomaly; Mental Health Association; methemalbumin; mic... |
| MSA | major serologic antigen; male-specific antigen; mannitol salt agar; Medical Services Administration;... |
| MTM | Thayer-Martin, modified [agar]; myotubular myopathy |
| NEY | neomycin egg yolk [agar] |