[Biological properties of variants of the rabies street virus].

Experiments in dogs inoculated intracerebrally with biological variants of paralytic (PRV) and convulsive (CRV) rabies virus isolated from the Yak strain population of street rabies virus demonstrated distinct differences in the biological properties of the variants PRV induced in dogs paralytic rabies with a short incubation period (average 6.4 days) and CRV induced an atypical convulsive form characterized by attacks of tonic convulsions of the body, legs, and head twitching, and a longer incubation period (18.5 and 9.6 days, respectively). This explains a wide variability of the biological properties of street rabies virus strains.