| molecular epidemiological investigation of velogenic newcastle disease viruses from village chickens in cambodia. | three isolates of newcastle disease virus (ndv) were isolated from tracheal samples of dead village chickens in two provinces (phnom penh and kampong cham) in cambodia during 2011-2012. all of these cambodian ndv isolates were categorized as velogenic pathotype, based on in vivo pathogenicity tests and f cleavage site motif sequence ((112)rrrkrf(117)). the phylogenetic analysis and the evolutionary distances based on the sequences of the f gene revealed that all the three field isolates of ndv f ... | 2013 | 23764918 |