RESUMEN
Results of monitoring of different subtypes of avian leukosis virus (ALV) from commercial poultry farms in 14 regions of Russian Federation were discussed. Only three regions were found to be negative. ALV was detected in other 11 regions in 46-64% cases (for different regions). The phylogenetic analysis of the genomes for the 12 field isolates of ALV was carried out in different regions of Russian Federation. The isolates belong to different subtypes of the virus and form two large groups. The genomic differences between Russian and foreign isolates within each group range from 5% to 10%.
Asunto(s)
Virus de la Leucosis Aviar/genética , Virus de la Leucosis Aviar/aislamiento & purificación , Leucosis Aviar/virología , Aves de Corral/virología , Animales , Leucosis Aviar/epidemiología , Virus de la Leucosis Aviar/clasificación , Genotipo , Filogeografía , Aves de Corral/genética , Federación de RusiaRESUMEN
The paper presents the results of classifying 20 Russian isolates of serotype 1 Marek's disease viruses (MDV) by the adapted "best fit" method (ADOL, USA). The native SPF-chickens of the Shchelkovo line have enough susceptibility for pathotyping of MDV. The Russian isolates were classified by the pathotype in comparison with the reference strains of varying virulence; 8 of them belonged to the vv+ pathotype, 11 to the vv pathotype, and 1 to the v pathotype.