| baghira | 1 | 1 |
| backentaschenprolaps | 1 | 2 |
| babette | 1 | 1 |
| ayleen | 1 | 1 |
| australian-cattledog-mischling | 1 | 1 |
| ausland | 1 | 2 |
| augenwurm | 1 | 2 |
| augenfremdkörper | 1 | 1 |
| augenfremdkoerper | 1 | 1 |
| augapfel | 1 | 2 |
| aufgrund | 1 | 2 |
| atemwegs-fremdkörper | 1 | 1 |
| atemwegs | 1 | 2 |
| assistenzteam | 1 | 1 |
| asky | 1 | 1 |
| aseptische | 1 | 2 |
| aryo | 1 | 1 |
| arya | 1 | 1 |
| apso | 1 | 1 |
| antibiotika-resistenz | 1 | 1 |