[Enzymatic and ultrastructural changes in isolated liver mitochondria from mice infected with several group A arboviruses].

Inoculation of white mice of varying body mass with pathologic strains of eastern and Venezuelan equine encephalomyelitis viruses and their attenuated variants (DNC-20/6 and No. 2621), promising as vaccine candidates, resulted in an increase of enzymatic activity and ultrastructural changes of isolated mitochondria from livers of the animals. The attenuated strains of the viruses were shown to induce temporary changes in both aspects of the study which became normal by the end of the study. There was a certain correlational dependence between the enzymatic activity and ultrastructural changes in isolated mitochondria associated with the use of energy in virus reproduction.