Abstract
Newcastle disease virus (NDV), also known as avian paramyxovirus serotype 1 (APMV-1), is a major economic concern for poultry producer world worldwide. Recently, analysis of the genome sizes and sequences of genes has revealed two distinct clades within APMV-1: class I and II. While class I isolates have been recovery from wild birds and samples from live bird markets; class II isolates h…