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| An antigen prepared from Melao virus failed to react in CF with the following mouse hyperimmune sera [1] : |
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| | Chikungunya | West Nile | Guaroa | | Mayaro | Yellow fever | Rift Valley fever | | Semliki forest | Zika | SF Naples | | EEE | Apeu | Simbu | | WEE | Marituba | Manzanilla | | Sindbis | Oriboca | Oropouche | | Rio Bravo | Catu | Turlock | | Dengue | Guama | Tacaiuma | | Ilheus | Bimiti | Wad Medani | | JBE | Kairi | Quaranfil (EgAr 1095) | | Ntaya | Cache Valley | Chenuda (EgAr 1152) | | RSSE | Bunyamwera | Mengo | | Spondweni | Wyeomyia | GD VII | | St. Louis | Anopheles A | | Uganda S | Bwamba |
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| Melao antigen gave a positive reaction in CF with antiserum prepared from California encephalitis virus. |
| Studies at the Rockefeller Foundation Virus Laboratories, New York have demonstrated that Melao virus is related to but distinguishable from both California encephalitis virus and also from trivittatus virus shown to have immunological relationship to California encephalitis virus [2] , [3] . |
| SIRACA has antigenically classified Melao virus as a distinct virus type and placed it in the California encephalitis complex, one of two complexes comprising the California serogroup. Melao virus is composed of five subtypes [10] . |
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