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  • Title: Studies on the invasive ability of malarial merozoites (Plasmodium berghei).
    Author: McAlister RO, Gordon DM.
    Journal: J Parasitol; 1977 Jun; 63(3):448-54. PubMed ID: 405468.
    Abstract:
    Studies were performed to evaluate several methods for the artificial removal of Plasmodium berghei merozoites from infected mouse erythrocytes. These methods, many of which have been reported to yield free parasites capable of establishing a patent infection when injected into a suitable host, included NH4C1-mediated lysis, complement-mediated immune lysis, pressure filtration, and multiple-burst and continuous-flow sonication. Free parasites isolated from infected mouse blood were examined in vitro under conditions known to support merozoite invasion, and were found to be noninvasive, irrespective of the method used for their isolation. Although all methods tested achieved high degrees of lysis, none removed all intact parasitized erythrocytes. Using multiple-burst and continuous-flow sonication, the infective potential of free parasite preparations could be accounted for solely on the basis of the intact parasitized cells contaminating the free parasite preparations.
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