Improved negative selection protocol for Plasmodium berghei in the rodent malarial model

Rachael Y Orr, Nisha Philip, Andrew P. Waters

Research output: Contribution to journalArticlepeer-review


An improved methodology is presented here for transgenic Plasmodium berghei lines that express the negative selectable marker yFCU (a bifunctional protein that combines yeast cytosine deaminase and uridyl phosphoribosyl transferase (UPRT)) and substitutes delivery of selection drug 5-fluorocytosine (5FC) by intraperitoneal injection for administration via the drinking water of the mice. The improved methodology is shown to be as effective, less labour-intensive, reduces animal handling and animal numbers required for successful selection thereby contributing to two of the "three Rs" of animal experimentation, namely refinement and reduction.

Original languageEnglish
Article number103
Number of pages6
JournalMalaria Journal
Publication statusPublished - 31 Mar 2012


  • Administration, Oral
  • Animals
  • Cytosine Deaminase
  • Disease Models, Animal
  • Female
  • Flucytosine
  • Malaria
  • Mice
  • Organisms, Genetically Modified
  • Pentosyltransferases
  • Plasmodium berghei
  • Saccharomyces cerevisiae
  • Selection, Genetic
  • Transfection
  • Journal Article
  • Research Support, Non-U.S. Gov't
  • Negative selection
  • Selectable marker


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