Molecular Individual-Based Approach on Triatoma brasiliensis: Inferences on Triatomine Foci, Trypanosoma cruzi Natural Infection Prevalence, Parasite Diversity and Feeding Sources

PLoS Neglected Tropical Diseases
Carlos Eduardo AlmeidaMyriam Harry

Abstract

We used an individual-based molecular multisource approach to assess the epidemiological importance of Triatoma brasiliensis collected in distinct sites and ecotopes in Rio Grande do Norte State, Brazil. In the semi-arid zones of Brazil, this blood sucking bug is the most important vector of Trypanosoma cruzi--the parasite that causes Chagas disease. First, cytochrome b (cytb) and microsatellite markers were used for inferences on the genetic structure of five populations (108 bugs). Second, we determined the natural T. cruzi infection prevalence and parasite diversity in 126 bugs by amplifying a mini-exon gene from triatomine gut contents. Third, we identified the natural feeding sources of 60 T. brasiliensis by using the blood meal content via vertebrate cytb analysis. Demographic inferences based on cytb variation indicated expansion events in some sylvatic and domiciliary populations. Microsatellite results indicated gene flow between sylvatic and anthropic (domiciliary and peridomiciliary) populations, which threatens vector control efforts because sylvatic population are uncontrollable. A high natural T. cruzi infection prevalence (52-71%) and two parasite lineages were found for the sylvatic foci, in which 68% of bugs ha...Continue Reading

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Citations

Oct 30, 2016·PLoS Neglected Tropical Diseases·Axelle MarchantMyriam Harry
Aug 23, 2017·The American Journal of Tropical Medicine and Hygiene·Antonieta Rojas de AriasCesia Villalba
Dec 14, 2019·PLoS Neglected Tropical Diseases·Alheli Flores-FerrerSébastien Gourbière
Jun 4, 2020·Journal of Vector Ecology : Journal of the Society for Vector Ecology·Jader de OliveiraJoão Aristeu da Rosa
Dec 28, 2019·Parasites & Vectors·Gilmar RibeiroMitermayer G Dos Reis
Jul 21, 2017·PLoS Neglected Tropical Diseases·Luis E Hernandez-CastroMartin S Llewellyn
Feb 9, 2019·The American Journal of Tropical Medicine and Hygiene·Natalia Faria Daflon-TeixeiraMarli Maria Lima
Jul 25, 2019·Revista Da Sociedade Brasileira De Medicina Tropical·Andressa Noronha Barbosa-SilvaEgler Chiari
May 13, 2021·Acta Tropica·Nathan Ravi Medeiros HonoratoAntônia Cláudia Jácome da Câmara
May 23, 2020·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Troy J KieranTravis C Glenn

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Methods Mentioned

BETA
PCR
genotyping

Software Mentioned

GeneClass2
ClustalW2
SeaView
OLIGO
Network
MICROCHECKER
ABGD ( Automatic Barecode Gap Discovery )
BLAST
jModelTest
ARLEQUIN

Related Concepts