a bovine viral diarrhea virus type 1a strain in china: isolation, identification, and experimental infection in calves.bovine viral diarrhea virus (bvdv) is one of the most important pathogens in cattle. previously, bvdv sub-genotypes of 1b, 1c, 1d, and 1 m were detected in china. however, isolation of bvdv type 1a from cattle has not been reported in china. in 2010, twenty nasal swabs and blood samples were collected from the cattle suspected bvdv infection in henan province, china. a bvdv isolate was isolated using cell culture, and the pathogenesis of the virus isolate was studied.201424444389
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