End-point Dilution and Plaque Assay Methods for Titration of Cricket Paralysis Virus in Cultured Drosophila Cells
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Cricket paralysis virus, an insect picorna-like virus, caused a distinct c.p.e. in cultured Drosophila melanogaster cells, allowing the development of titration methods based on end-point dilution or plaque assay methods. The end-point dilution (TCD50) method is more sensitive and economical than plaque assays and is easily scored. The data indicate a minimum infectivity/particle ratio of about 1/2000.
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