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The arthropod-borne viruses (arboviruses) and rodent-borne viruses represent ecologic groupings of viruses with complex transmission cycles involving arthropods or rodents. These viruses have diverse physical and chemical properties and are classified in several virus families.

Arboviruses and rodent-borne viruses are classified among the Arenaviridae, Bunyaviridae, Flaviviridae, Reoviridae, and Togaviridae families. The African hemorrhagic fever viruses are classified in the Filoviridae family (Table 38-1, Figure 38-1). A number of the diseases described here are considered emerging infectious diseases (see Chapter 29).

TABLE 38-1Classification and Properties of Some Arthropod-Borne and Rodent-Borne Viruses

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