The Role Played By White Egret In Transmission Of Newcastle Disease Virus (Velogenic Viscerotropic Strain)

The present study was designateC! to throw light on the role played by white egret in transmission of Rewcastledisease virus (velogenic vescerotropic strain). Therefore’our efforts have been concentrated first by on detection of the natural infection in free flying white egrets through isolation of the virus and/~r demonstration of Newcastleiisease virus antibodies in their sera; secondly on testing;he susceptibility of white egrets to the infection by he velogenic viscerotropic Newcastle disease ; and thirdly n exploring the possi bili t~l of transmission of the VVNDV~om egrets to domestic chickns.The results achieved can be summarised as follows: from 100 free-flying white egrets (40 egrets were lted from the Giza governorate and 60 egrets from EI-g area), three isolates of NDV were identified and ed. l~o isolates were of the velogenic, viscerotropicwtype, and the other one was of the mesogenic pathotype.the isolates were recovered from El-Marg area reaching rcentage of recovery of 5%. Also the natural infection of egrets in the EI-Marg was proved by detecting HI anti bodies against NDV in 8.3% of ) the examined caseso