Quantitative and qualitative comparisons of Cryptosporidium faecal purification procedures for the isolation of oocysts suitable for proteomic analysis

Q. Truong*, B. C. Ferrari

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

With the recent publication of the Cryptosporidium genome, investigation of the proteins expressed by Cryptosporidium parvum will provide complementary information on the biology of this complex organism. Proteomic studies on this apicomplexan parasite have been hampered due to the inability to culture or isolate high numbers required for 2D gel analysis. Neonatal calves are a common source of Cryptosporidium oocysts and we report on the development of a sucrose-Percoll™ purification procedure which produced the high yield and purity (free from faecal and bacterial contaminants) that is required for successful proteomic studies from neonatal calves. We report on the development of quantitative and qualitative flow cytometric methods which were confirmed by epifluorescence microscopy. A comparison of five common purification procedures was carried out to determine the efficiency of the sucrose-Percoll™ gradient. 2D-PAGE results strongly support the sucrose-Percoll™ procedure as the most suitable method for applications like proteomics which require the recovery of high numbers of isolated oocysts with minimal faecal and bacterial contaminants.

Original languageEnglish
Pages (from-to)811-819
Number of pages9
JournalInternational Journal for Parasitology
Volume36
Issue number7
DOIs
Publication statusPublished - Jun 2006

Keywords

  • Cryptosporidium
  • Flow Cytometry
  • Oocysts
  • Proteomics
  • Purification
  • Sucrose-Percoll™

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