Orinda G. O., Waltisbuhl D. J., Goodger B. V. and Wright I. G. 1992. Serological and immunological studies with a hexane extract of Babesia bovis- infected erythrocytes. International Journal for Parasitology 22: 677-679. Antigenic and immunogenic activities of a hexane extract from Babesia bovis-infected erythrocytes were investigated. Positive ELISA and IFAT reactions were obtained with bovine antisera to B. bovis and B. bigemina produced by natural infection and rabbit antisera to the hexane extract, respectively. In contrast, negative ELISA reactions were obtained with Anaplasma marginale antisera indicating that the antigen(s) is specific for the genus Babesia. The IFAT clearly demonstrated that the antigen was associated with the parasite and the infected erythrocyte and not present in uninfected erythrocytes. Furthermore, cross-reactions with Babesia bigemina antisera suggested that serological crossreactivity in bovine Babesia species is at least due in part to lipid or lipid-associated antigens. © 1992.
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