Genomic analysis of Clostridium perfringens BEC/CPILE-positive, toxinotype D and E strains isolated from healthy children

Raymond Kiu, Kathleen Sim, Alex Shaw, Emma Cornwell, Derek Pickard, J. Simon Kroll, Lindsay J. Hall

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Clostridium perfringens toxinotype D, toxinotype E, and gastroenteritis-linked BEC/CPILE-positive strains have never been reported in healthy children. We isolated, whole-genome sequenced and bioinformatically characterised three C. perfringens isolates-type D (IQ1), type E (IQ2) and BEC/CPILE-positive (IQ3), recovered from the stools of three healthy two-year-olds, which were further compared to 128 C. perfringens genomes available from NCBI. The analysis uncovered a previously under-described putative toxin gene alv (alveolysin) encoded by isolates IQ2 and IQ3, which appeared to be a clade-specific trait associated with strains from domestic animals. A plasmid analysis indicated that the iota-toxin was encoded on a near-intact previously described plasmid pCPPB-1 in type E strain IQ2. The BEC genes becA and becB were carried on a near-identical pCPOS-1 plasmid previously associated with Japanese gastroenteritis outbreaks. Furthermore, a close phylogenetic relatedness was inferred between the French C. perfringens type E isolates cp515.17 and newly sequenced IQ2, suggesting geographical links. This study describes novel C. perfringens isolates from healthy individuals which encode important toxin genes, indicating the potential spread of these veterinary and clinically important strains and mobile genetic elements, and highlights areas for future research.

Original languageEnglish
Article number543
Number of pages14
JournalToxins
Volume11
Issue number9
DOIs
Publication statusPublished - 19 Sep 2019
Externally publishedYes

Keywords

  • Clostridium perfringens
  • epsilon toxin
  • iota toxin
  • whole genome sequencing
  • infants
  • binary toxins
  • genome analysis
  • EPSILON-TOXIN
  • PERFRINGOLYSIN-O
  • ENTEROTOXIN
  • PLASMIDS
  • COLONIZATION
  • PNEUMOLYSIN
  • ALVEOLYSIN
  • DIVERSITY
  • ALGORITHM

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