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Grouping of NDV isolates and vaccine strains by ICPI and region
| Group | Range of ICPI | NDV isolates | Region % | Vaccine strains | |
|---|---|---|---|---|---|
| N | % | ||||
| 68.7 ST | |||||
| (1) | 0.00 to 0.10 | 32 | 41.5 | 25.0 S | Ulster, VG-GA, V4, C2 |
| 6.3 CW | |||||
| 46.1 ST | |||||
| (2) | 0.11 to 0.30 | 27 | 35.1 | 44.4 S | B1 |
| 7.4 CW | |||||
| 50.0 ST | |||||
| (3) | 0.31 to 0.50 | 14 | 18.2 | 42.9 S | La Sota, Clone 30 |
| 7.1 CW | |||||
| (4) | 0.51 to 0.66 | 04 | 5.2 | 75.0 ST | Other virus |
| 25.0 S | |||||
ST= Southeastern S= Southern CW= Central-Western
