Abstract
The murine encephalomyelitis viruses consist of three distinct strains separable from each other by infectivity and serological tests. The TO form possesses low neurotropic potentialities and is a common commensal in the intestinal tract of laboratory mice. The FA and GDVII strains are highly neurotropic and while serologically related to each other are entirely distinct from the TO group.
The experimental results may conveniently be divided into three sections: 1) Infectivity experiments; 2) Haemagglutination by the GDVII strain; 3) Tissue culture of the GDVII virus.