Discovery of new variable number tandem repeat loci in multiple Cryptosporidium parvum genomes for the surveillance and investigation of outbreaks of cryptosporidiosis

Gregorio Pérez-Cordón, Guy Robinson, Johanna Nader, Rachel M. Chalmers

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
38 Downloads (Pure)


Cryptosporidium parvum is a protozoan parasite causing gastro-intestinal disease (cryptosporidiosis) in humans and animals. The ability to investigate sources of contamination and routes of transmission by characterisation and comparison of isolates in a cost- and time-efficient manner will help surveillance and epidemiological investigations, but as yet there is no standardised multi-locus typing scheme. To systematically identify variable number tandem repeat (VNTR) loci, which have been shown to provide differentiation in moderately conserved species, we interrogated the reference C. parvum Iowa II genome and seven other C. parvum genomes using a tandem repeat finder software. We identified 28 loci that met criteria defined previously for robust typing schemes for inter-laboratory surveillance, that had potential for generating PCR amplicons analysable on most fragment sizing platforms: repeats ≥6 bp, occurring in tandem in a single repeat region, and providing a total amplicon size of <300 bp including 50 bp for the location of the forward and reverse primers. The qualifying loci will be further investigated in vitro for consideration as preferred loci in the development of a robust VNTR scheme.
Original languageEnglish
Pages (from-to)119–128
JournalExperimental Parasitology
Early online date12 Aug 2016
Publication statusPublished - Oct 2016


  • Cryptosporidium parvum
  • Variable number tandem repeats
  • Multilocus

Cite this