Abstract
Upon studying the relationship between various kinds of wild birds and Japanese B Encephalitis virus, it is revealed that night herons present especially high positive rate of J. B. E. neutralizing antibody.
Consequently, in 1952, test for the presence of viremia, isolation of virus from bird brains, neutralization test and CFT (complement fixation test) of the sera of herons and tattlers were conducted.
O 23 samples of heron sera 8 samples (34%) were neutralizing antibody positive and all negative for CFT. While, 34 samples of tattler sera showed all neutralizing antibody negative, and only 4 samples of them were compelement fixing antibody positive.
Presence of viremia in 16 herons and tattlers were not recognized. Isolation of the virus from the brains of 40 herons and tattlers, and also from the parasites of herons were tried, but all in negative results.
