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In page Arbovirus:

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In the past, arboviruses were organized into one of four groups: A, B, C, and D. Group A denoted members of the genus Alphavirus,[1][2] Group B were members of the genus Flavivirus,[3] and Group C remains as the Group C serogroup of the genus Orthobunyavirus.[4] Group D was renamed in the mid-1950s to the Guama group and is currently the Guama serogroup in the genus Orthobunyavirus.[5] Currently, viruses are jointly classified according to Baltimore classification and a virus-specific system based on standard biological classification. With the exception of the African swine fever virus, which belongs to the Asfarviridae family of viruses, all major clinically important arboviruses belong to one of the following four groups:[citation needed]