抄録
I tried the hemagglutination reaction with Nakayama, G. I. and two other strains of virus of Japanese B encephalitis according to the method of Sabin and Buesher (1950) and found the virus agglutinated the chick red cells in proper conditions which were strictly limited specially in pH and temperature.
The non-specific inhibitory action of normal animal serum to hemagglutination was highly potent. I found amylalcohol-carbon tetrachloride was effective in removing this inhibitory action. No inhibitory action was found in the spinal fluids of normal persons and patients. In cases where Japanese encephalitis was present the inhibitory action was pronounced.
Specific inhibitory substance to hemagglutination appear in the serum and spinal fluids of Japanese encephalitis patients, though the titre of the spinal fluid was found to be lower. The inhibition titre increases during the hospitalization of the patient.
