Molecular diagnosis of Strongyloides stercoralis among transplant candidates

Transpl Infect Dis. 2018 Aug;20(4):e12909. doi: 10.1111/tid.12909. Epub 2018 May 14.

Abstract

Strongyloidiasis can occur without any symptoms or as a potentially fatal hyperinfection or disseminated infection, principally in immunosuppressed patients. Our study aimed to evaluate the application of conventional polymerase chain reaction (cPCR) and real-time PCR (qPCR). Polymerase chain reaction (PCR) and real-time PCR (qPCR) targeting the 18S rRNA gene for detection of Strongyloides stercoralis infection among transplant candidates were applied in stool samples obtained from 150 transplant candidates, preliminarily analyzed by parasitological methods. S. stercoralis larvae were visualized in 15/150 (10.0%) transplant candidates by parasitological methods. DNA from S. stercoralis was amplified in 26/150 (17.3%) and 49/150 (32.7%) stool samples of transplant candidates, using cPCR and qPCR, respectively. The results suggest that molecular methods, especially qPCR, should be used as an additional tool for diagnostic of S. stercoralis infection among transplant candidates.

Keywords: Strongyloides stercoralis; molecular diagnosis; transplant candidate.

Publication types

  • Evaluation Study

MeSH terms

  • Animals
  • Brazil / epidemiology
  • DNA, Helminth / isolation & purification*
  • Feces / parasitology*
  • Genes, rRNA / genetics
  • Humans
  • Immunocompromised Host
  • Larva
  • Prevalence
  • Real-Time Polymerase Chain Reaction
  • Sensitivity and Specificity
  • Sequence Analysis, DNA / methods*
  • Strongyloides stercoralis / genetics
  • Strongyloides stercoralis / isolation & purification*
  • Strongyloidiasis / diagnosis*
  • Strongyloidiasis / epidemiology
  • Strongyloidiasis / immunology
  • Strongyloidiasis / parasitology
  • Transplantation / adverse effects

Substances

  • DNA, Helminth