TABLE 2.

Plaque formation in L2 cells and virulence phenotype analysis

StrainPlaque size (% of wild type)Virulence phenotype (LD50)
10403S1001 × 104-3 × 104a
NF-L4761001 × 104-3 × 104
DP-L194272 × 107b
NF-L7676∼5 × 106
DP-L1465532 × 106
DP-L229671<5 × 104c
DP-L2343607 × 106
NF-L90478NDd
NF-L572108ND
  • a Reference 47.

  • b Reference 6.

  • c Reference 39.

  • d ND, not determined.