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A Hobi-like pestivirus pair consisting of cytopathogenic (cp) and non-cytopathogenic (noncp) strains, Italy 83/10cp and Italy 83/10ncp, was isolated from the lung of a heifer that died of respiratory disease. The noncp and cp viruses were isolated on Madin–Darby bovine kidney cells and separated by plaque purification and end point dilution. Analysis of the nearly full-length genomes revealed that the two viruses were very closely related to each other and to the noncp Hobi-like strain Italy 1/10-1, which had been isolated a few weeks earlier from the same herd. One major difference between noncp and cp viruses concerned the presence of a cellular Jiv sequence in the 3′ domain of the NS2-encoding region of the cp strain. This is the first study, to our knowledge, reporting the isolation and molecular characterization of a Hobi-like virus pair.
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