Molecular-genetic characterization of parainfluenza-3 virus isolates

This study reports on the molecular-genetic characterization of a field strain of BPIV-3 isolated in the Republic of Tatarstan. M gene fragments of the Russian isolate LD-9 and the vaccine strain PTK/86 were sequenced and aligned with the corresponding sequences of the virus strains presented in GenBank. The results of the phylogenetic analysis showed that the Russian isolate LD- 9 (MW52481) and the vaccine strain PTK45/86 belong to the genotype A of the parainfluenza virus- 3, as well as the reference strain SF-4. The Russian isolate LD-9 showed 98.3 % similarity with the reference strain SF-4, and the Russian vaccine strain PTK-45/86 was 100 % identical to the reference strain.