Abstract
Camelpox virus is the causative agent of Camelpox, a highly contagious disease of camels. A high passage Camelpox virus strain has previously been reported to contain several genes which more closely resemble Vaccinia, a virus species with no known natural host, encompassing various strains that show high inter-strain genomic variation. In this study, we demonstrate that yet another high passage, live attenuated vaccine, comprising a different strain of Camelpox virus, contains genomic sequences that match a differing strain of Vaccinia virus. These results are discussed in the context of hypotheses put forward to explain the unknown origins of Vaccinia virus, suggesting further studies to elucidate evolutionary trajectories of Orthopoxviruses through passaging.
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