Skip to main content

Table 2 Coefficients of antigenic similarity (R) between NDV isolates and LaSota strain

From: Characterization of virulent Newcastle disease viruses from vaccinated chicken flocks in Eastern China

Strains

R valuec

345–353 Residues of HN

SD-01-11-Ch

0.04a 0.12b

PDKQDYQIR

JS-07-11-Ch

0.12a 0.12b

PDKQDYQIR

JS-14-12-Ch

0.06a 0.12b

PDKQDYQIR

HeN-01-12-Ch

0.12a 0.12b

PDKQDYQIR

JS-27-13-Ch

0.17a 0.25b

PDKQDYQIR

JS-08-11-Ch

0.35a 0.35b

PDGQDYQIR

JS-15-11-Ch

0.35a 0.5b

PDEQDYQIR

JS-05-12-Ch

0.35a 0.35b

PDEQDYQIR

JS-18-12-Ch

0.25a 0.35b

PDEQDYQIR

JS-22-12-Ch

0.35a 0.35b

PDEQDYQIR

  1. aChicken embryo cross-neutralization test
  2. bCross-hemagglutination inhibition test
  3. c0.67 ≤ R ≤ 1.5, indicates no significant antigenic difference between the two viruses
  4. 0.5 ≤ R ≤ 0.67 indicates a minor difference between the two viruses
  5. R < 0.5 indicates a major difference between the two virus strains