1965 Volume 18 Issue 8 Pages 437-442
A horse was kept in an isolated stable in Akita Prefecture for about eleven years since it was diagnosed as equine infectious anemia (EIA) on January 22, 1954.
It was sent to this institute on October 8, 1964. No changes characteristic of EIA were recognized on it from the results of hematological examination and histopathological investigation by liver puncture made after its arrival.
Blood was collected from this horse upon its arrival and injected into a healthy horse. The former was slaughtered on the eighth day after its arrival, and emulsions of its visceral organs and blood were injected into two other healthy horses. The three inoculated horses showed typical symtoms of EIA after the lapse of nearly the same period of incubation.
Consequently, the horse examined was distinctly confirmed to be an EIA virus carrier, in spite of the lapse of a long time.
