| | | Mayaro virus falls into Group A. For details on relationship to a number of other viruses in this group see [4] , [20] - [24] . Among those to which it was compared, it resembles Semliki Forest virus most closely. By HI, Casals [10] found Uruma indistinguishable from Mayaro. However, Schmidt, et al. [11] found differences by both HI and CF between Mayaro and Uruma and regarded them as distinct viruses. | | NOTE: Uruma virus is now considered to be a strain of the Mayaro virus, and its registrations has been withdrawn [19] . | | SIRACA has antigenically classified Mayaro virus and placed it in the Semliki Forest complex of serogroup A. Una virus was classified as a subtype of Mayaro virus [24] . | | |
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