[Variations in the temperature range for reproduction of virulent and attenuated cold-adapted influenza A viruses].

: The informativity of RCT40, RCT37.5, and RCT25 markers for differentiation of wild type strains from ca-recombinants obtained on the basis of ca donors of attenuation was studied. The RCT25 marker and express RCT37.5 marker (determined within 24 hours) were found to be universal characteristics differentiating ca-recombinants from virulent viruses.