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  • Title: Encephalitis of cattle caused by Iriki isolate, a new strain belonging to Akabane virus.
    Author: Miyazato S, Miura Y, Hase M, Kubo M, Goto Y, Kono Y.
    Journal: Nihon Juigaku Zasshi; 1989 Feb; 51(1):128-36. PubMed ID: 2494374.
    Abstract:
    A disease characterized by nervous signs was found in 10 calves in two districts in Kagoshima Prefecture, Japan, from October to November, 1984. Histopathological changes of nonpurulent encephalitis were found in every case. An agent, named Iriki isolate, was isolated from the cerebellum of a calf in HmLu-1 cell cultures. All of the affected calves possessed neutralizing antibody to the virus. A high seropositive rate to the virus in cohabiting cattle and cattle kept in the epizootic area, and seroconversion to the virus in 1984, were disclosed. Experimental infection of calves with Iriki isolate produced severe nervous signs and histopathological changes similar to those of the natural infection. These seroepidemiological findings and animal experiments established that Iriki isolate is the causative agent of the disease. Iriki isolate was considered as a variant of Akabane virus since the virus showed cross reaction with Akabane virus in virus neutralization tests.
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