title: Polycation effect on virulence of nonpathogenic r+ variant of the encephalomyocarditis virus.
mesh_terms: D000818:Animals; D003588:Cytopathogenic Effect, Viral; D003911:Dextrans / Q000494:pharmacology*; D004686:Encephalomyocarditis virus / Q000302:isolation & purification / Q000472:pathogenicity*; D014644:Genetic Variation; D007739:L Cells; D051379:Mice; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D014774:Virulence; D014776:Virus Cultivation
chemical_list: D003911:Dextrans; D000644:Quaternary Ammonium Compounds