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Characterization of Colombian serotype 1 avian paramyxoviruses, 2008-2010.
Virus Genes 2017 August
Newcastle disease (ND) still remains one of the most important diseases affecting domestic poultry in Colombia. Here, for the first time, we report on the molecular characterization of 12 virulent and 12 avirulent or lentogenic avian paramyxovirus type 1 (APMV-1) strains that were isolated from commercial, backyard, and game poultry in Colombia from 2008 to 2010. The 12 virulent isolates had a fusion (F) protein cleavage site with basic amino acids at positions 113, 115, and 116 and a phenylalanine at position 117 (112 RRQKR*F117 ), characteristic of virulent strains. The remaining 12 isolates had the F protein cleavage sites 112 GKQGR*L117 or 112 GRQGR*L117 typical of avirulent or lentogenic APMV-1 strains. Phylogenetic analysis of full-length F genes of all isolates was performed, and based on the recently proposed criteria for classification of APMV-1 strains, the 24 Colombian isolates were found to belong to class II viruses and clustered into four different genotypes. Ten virulent isolates clustered with genotype VII (sub-genotype VIId), seven lentogenic strains within genotype II, five lentogenic strains with genotype I (sub-genotype Ia), and two virulent isolates within genotype XII. Our data provide essential information on the genetic diversity of AMPV-1 isolates circulating in Colombia.
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