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Fluctuations in Trypanosoma cruzi discrete typing unit composition in two naturally infected triatomines: Mepraia gajardoi and M. spinolai after laboratory feeding

Authordc.contributor.authorEgaña, Camila 
Authordc.contributor.authorPinto, Raquel 
Authordc.contributor.authorVergara, Fernanda 
Authordc.contributor.authorOrtiz, Sylvia 
Authordc.contributor.authorCampos Soto, Ricardo 
Authordc.contributor.authorSolari Illescas, Aldo 
Cita de ítemdc.identifier.citationActa Tropica 160(2016)9-14es_ES
Abstractdc.description.abstractMepraia species are hematophagous insects and the most important wild vectors of Trypanosoma cruzi, the causative agent of Chagas disease in southeastern South America. Because the domestic Triatoma infestans is already controlled, the transmission of different T. cruzi discrete typing units (DTUs) by Mepraia species deserves attention. Our aim is to gather information on the diversity of T. cruzi DTUs circulating in natural insect populations. Two groups of naturally infected bugs 21 Mepraia gajardoi and 26 Mepraia spinolai were followed-up after two or more laboratory feedings by means of minicircle-PCR assays to evaluate the composition of four T. cruzi DTUs by hybridization tests. Fluctuations from positive T. cruzi detection to negative and the converse, as well as single to mixed infections with different T. cruzi DTUs and the opposite were frequent observations after laboratory feeding in both Mepraia species. Single and mixed infections with more than two T. cruzi DTUs were detected after the first feeding; however mainly mixed infections prevailed after the second feeding. Laboratory feeding on three or more occasions resulted in a decreasing trend of the parasite burden. In a comparison with 28 infected and fed M. gajardoi collected one year before from the same vector colony T. cruzi DTU5 composition changed, indicating that temporal variations occur in T. cruzi. Natural populations of Mepraia species can transmit complex mixtures T. cruzi DTU5 which fluctuate over time after feeding, with a tendency to eliminate the parasitism after prolonged feeding. (C) 2016 Elsevier B.V. All rights reservedes_ES
Patrocinadordc.description.sponsorshipFONDECYT-Chile 1120122 3150289es_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceActa Tropicaes_ES
Keywordsdc.subjectTrypanosoma cruzies_ES
Keywordsdc.subjectSingle-mixed natural infectionses_ES
Keywordsdc.subjectProspective studyes_ES
Keywordsdc.subjectTriatome feedinges_ES
Títulodc.titleFluctuations in Trypanosoma cruzi discrete typing unit composition in two naturally infected triatomines: Mepraia gajardoi and M. spinolai after laboratory feedinges_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile