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  • Title: Acute and persistent infection by a transfected Mo7 strain of Babesia bovis.
    Author: Suarez CE, Laughery JM, Schneider DA, Sondgeroth KS, McElwain TF.
    Journal: Mol Biochem Parasitol; 2012 Sep; 185(1):52-7. PubMed ID: 22669120.
    Abstract:
    A Mo7-derived Babesia bovis line stably transfected with the gfp-bsd gene was inoculated into two four to five months old calves, while two additional calves were inoculated with Mo7 parasites. Similar mild clinical signs were detected in all calves. B. bovis rap-1 was identified in the bloodstream by PCR four days post inoculation (dpi), and consistently over ten months thereafter. Transfusion of blood from experimentally infected calves into four naïve splenectomized calves at 212 dpi resulted in acute disease in recipients, confirming persistent infection in the four donor animals. The proportion of GFP expressing parasites recovered from a splenectomized recipient calf is undistinguishable from transfected parasites that were maintained in long term culture under blasticidin selection. Furthermore, the sequences of transfected genes in recovered parasites remained unaltered. Together, the data demonstrates that exogenous B. bovis transgenes can be expressed and remain stable throughout acute and persistent infection in calves.
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