Abortion and congenital malformations in cattle suspected of being caused by Peaton virus infection in Okayama, Japan, from October 2016 to April 2017
2020
Hirose, Y. (Okayama Livestock Hygiene Service Center, Okayama (Japan)) | Mizukami, C. | Utaka, N. | Tanaka, S. | Shirafuji, H.
This paper describes pathological features of 8 cattle presumably associated with Peaton virus (PEAV) infection in Okayama, Japan, from October 2016 to April 2017. Among those cattle, the case of an abortion had neither spinal curve nor arthrogryposis based on gross observations, while 7 calves exhibited congenital malformations. Immunohistochemical examinations revealed PEAV antigens in the cerebrum of 3 cases, including 1 aborted fetus and 2 cases with malformations. PEAV RNA was also detected in the brains of 2 cases, including the aborted fetus. In all 7 calves with malformations, relatively high titers of neutralizing antibodies against PEAV were detected. In addition, PEAV seroconversion was confirmed in sentinel cattle from September 2016 to November 2016 in Okayama. Although congenital malformations in the newborn calves associated with PEAV infections have previously been well documented in Japan, there is little information concerning the pathological features of abortion. This is the first report on an abortion presumably associated with PEAV infection.
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