| Code | Definition | Number of Accessions |
| 2 | (1 = NO SYMPTOMS OBSERVED, 9 = SEVERE INFECTION/INFESTATION) | 8 |
| 3 | (1 = NO SYMPTOMS OBSERVED, 9 = SEVERE INFECTION/INFESTATION) | 99 |
| 4 | (1 = NO SYMPTOMS OBSERVED, 9 = SEVERE INFECTION/INFESTATION) | 218 |
| 5 | (1 = NO SYMPTOMS OBSERVED, 9 = SEVERE INFECTION/INFESTATION) | 148 |
| 6 | (1 = NO SYMPTOMS OBSERVED, 9 = SEVERE INFECTION/INFESTATION) | 26 |