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Pathogenicity studies of L-chimeric viruses in 6-week-old chickens by IVPI testa
| Virus | IVPI
|
|
|---|---|---|
| Test 1 | Test 2 | |
| rBC | 2.06 | 2.00 |
| rBCLaSoL | 2.26 | 2.33 |
| rLaSota | 0.00 | 0.00 |
| rLaSoBCL | 0.00 | 0.00 |
The IVPI values for velogenic strains approach the maximum score of 3.00, whereas lentogenic strains give values close to 0.0.
