Identification by Q-PCR of Trypanosoma cruzi lineage and determination of blood meal sources in triatomine gut samples in México

Gabriela Ibáñez-Cervantes, Alejandro Martínez-Ibarra, Benjamín Nogueda-Torres, Eduardo López-Orduña, Ana L. Alonso, Cynthia Perea, Teresa Maldonado, José Manuel Hernández, Gloria León-Avila

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Triatomine vectors were collected on human dwellings in Michoacán México. Blood meal sources were identified by real time polymerase chain reaction (Q-PCR) using DNA extracted from triatomine guts. The assay was performed with one only specific primer set to amplify a fragment of the mitochondrial 12S ribosomal gene from vertebrate species. Also Trypanosoma cruzi parasites were detected in triatomine gut samples by microscopy and the positive infection was tested in mice. In addition T. cruzi discrete taxonomic units (DTUs) were identified by Q-PCR with two sets of primers that amplify the mini-circle region (miniexon) and 18S ribosomal mitochondrial gene. The sequences obtained from 18S ribosomal gene amplifications confirmed the presence of T. cruzi I and II lineages, and provide evidence of the presence of lineage TcIII and TcIV.

Original languageEnglish
Pages (from-to)36-43
Number of pages8
JournalParasitology International
Volume62
Issue number1
DOIs
StatePublished - Feb 2013

Keywords

  • Chagas disease
  • DTU
  • Feeding sources
  • Q-PCR
  • Trypanosoma cruzi

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