Spontaneous Encephalitis of Rabbits

We have examined bocteriologically and histo-pathologically the materials of rabbits affected with spontaneous encephalitis, but specific bacteria for this disease have not been found and yet nor gross lessions characteristic for the disease were found macroscopically.We are sure that this spontaneous encephalitis is not caused by bacteria, and it is supposed that this disease may be caused by somh unitary causative agent, because in all cases there are some changes with specific granulom in the brains as histological findings. Judging from the histo-pathological changes, it is supposed that the causative agent has the tendency to be neurotropic.The agent may be the Encephalitozoon cuniculi as Levaditi and his collaborators believed, but we have no positive proof it until this time. Anyhow it is sure that the rabbits inoculated with the brain emulsion of the animals affected with spontaneous encephalitis of rabbits were infected with the disease, although it is irregular.