| Fixed complement with Bunyamwera virus antiserum. Neutralized by Cache Valley, Maguari, Tensaw, Kairi, Batai (Calovo) and Bunyamwera but not by Germiston or Ilesha virus antisera. Tlacotalpan virus antiserum did not neutralize Tensaw or Kairi and only partially neutralized Cache Valley, Maguari, and Batai viruses [1] . | Presently, SIRACA considers Tlacotalpan virus to be a variety ov Cache Valley virus [3] . | Recently, two strains of a single virus were isolated, one from an apparently healthy cow, and one from a sick ram in northestern Texas. This virus was shown to be closely related antigenically to Cache Valley and Tlacotalpan viruses. Both Tlacotalpan virus and the virus from livestock were considered to be varieties of Cache Valley virus [2] . | |
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