| MDV | Marek disease virus; mean dye [bolus] velocity; mucosal disease virus |
|---|---|
| NTD | neural tube defect; nitroblue tetrazolium dye; noise tone difference; 5'-nucleotidase |
| OAD | obstructive airway disease; organic anionic dye |
| TGD | thermal-green dye |
| DFA | Direct Fluorescent Antibody |