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Table 1 Pathogenicity index tests of Egyptian strains of NDV.

From: Sequence analysis of fusion protein gene of Newcastle disease virus isolated from outbreaks in Egypt during 2006

Strains IVPI ICPI MDT
NDV/chicken/Egypt/2/2006 2.1 ± 0.24 1.6 ± 0.15 60 ± 1.5
NDV/chicken/Egypt/3/2006 2.2 ± 0.29 1.8 ± 0.19 50 ± 1.8
NDV/chicken/Egypt/4/2006 2.25 ± 0.23 1.7 ± 0.18 55 ± 2.3
NDV/LaSota ND 0.0 102 ± 2.5
  1. Intravenous pathogenicity index (IVPI) was done in 6-week-old chickens, intracerebral pathogenicity index (ICPI) test in 1-day-old chicks inoculated intracerebrally and mean death time (MDT) in 9-day-old eggs inoculated through allantoic cavity following standard protocol.