Abstract
Develop a method of differentiation of Y.pestis strains of different subspecies based on PCR with hybridization-fluorescent detection in real-time. DNA target search for differentiation of subspecies of plague causative agent was carried out by Mauve 2.3.1, Mega 5.0 and BLAST algorithm based on comparison of full-genome sequenc- es of Y.pestis strains. Primers and TAqMan probes were calculated for the DNA targets found, conditions of PCR with hybridization-fluorescent detection - optimized. DNA targets carrying marker mutations for the caucasus, altai, gissar, ulegei subspecies, strains from Talass alpine plague reservoir were detected. The effectiveness of the DNA targets found and the developed approach of subspecies differentiation is confirmed on 101 Ypestis strains of different subspecies, isolated from natural foci of Russia, near and far abroad. The developed approach based on PCR with real-time detection allows for a rapid and effective differentiation of Ypestis strains of various subspecies.
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