CRISPR screen to determine the in vivo fitness of Toxoplasma genes

Lamba Omar Sangaré, Yifan Wang, David Arranz-Solís, Jeroen P.J. Saeij

Research output: Contribution to journalArticlepeer-review


The virulence of eukaryotic parasites like Toxoplasma gondii depends on their capacity to escape from the host immune response and disseminate throughout the host organism. However, Toxoplasma gene products essential for its in vivo pathogenesis remain uncharacterized. Here, we present the complete workflow of a CRISPR-Cas9 in vivo loss-of-function screen to identify Toxoplasma fitness-conferring genes. This protocol can be used to uncover gene products that play a role in Toxoplasma immune evasion, nutrient acquisition, dissemination, and tissue colonization. For complete details on the use and execution of this protocol, please refer to Sangaré et al. (2019).

Original languageEnglish (US)
Article number100520
JournalSTAR Protocols
Issue number2
StatePublished - Jun 18 2021
Externally publishedYes


  • High Throughput Screening
  • Microbiology
  • Sequencing

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Neuroscience(all)
  • Immunology and Microbiology(all)


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