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Abstract:

Triatoma sordida is a secondary vector of Trypanosoma cruzi in the Gran Chaco and Cerrado eco-regions where it frequently infests peridomestic and domestic habitats. In a well-defined area of the humid Argentine Chaco, very few T. sordida were found infected when examined by optical microscopic examination (OM). In order to further assess the role of T. sordida and the relative magnitude of subpatent bug infections, we examined the insects for T. cruzi infection, parasite Discrete Typing Units (DTUs) and bloodmeal sources using various molecular techniques. Among 205 bugs with a negative or no OM-based diagnosis, the prevalence of infection determined by kDNA-PCR was nearly the same in bugs captured before (6.3%) and 4 months after insecticide spraying (6.4%). On average, these estimates were sixfold higher than the prevalence of infection based on OM (1.1%). Only TcI was identified, a DTU typically associated with opossums and rodents. Chickens and turkeys were the only bloodmeal sources identified in the infected specimens and the main local hosts at the bugs' capture sites. As birds are refractory to T. cruzi infection, further studies are needed to identify the infectious bloodmeal hosts. The persistent finding of infected T. sordida after community-wide insecticide spraying highlights the need of sustained vector surveillance to effectively prevent T. cruzi transmission in the domestic and peridomestic habitats. © 2014 Elsevier B.V..

Registro:

Documento: Artículo
Título:Trypanosoma cruzi infection in Triatoma sordida before and after community-wide residual insecticide spraying in the Argentinean Chaco
Autor:Macchiaverna, N.P.; Gaspe, M.S.; Enriquez, G.F.; Tomassone, L.; Gürtler, R.E.; Cardinal, M.V.
Filiación:Laboratory of Eco-Epidemiology, Department of Ecology, Genetics and Evolution, Universidad de Buenos Aires-IEGEBA (CONICET-UBA), Buenos Aires, Argentina
Dipartimento di Scienze Veterinarie, Università degli Studi di Torino, Grugliasco (TO), Italy
Palabras clave:Bloodmeal identification; DTU; Molecular diagnosis; Triatoma sordida; Trypanosoma cruzi; Vector control; insecticide; antitrypanosomal agent; insecticide; kinetoplast DNA; protozoal DNA; disease control; disease incidence; disease prevalence; disease transmission; disease vector; humid tropics; infectious disease; insecticide; parasitic disease; Argentina; Article; Chagas disease; chicken; controlled study; disease transmission; habitat; infestation; microscopy; nonhuman; opossum; polymerase chain reaction; prevalence; rodent; Triatoma infestans; Triatoma sordida; Trypanosoma cruzi; turkey (bird); animal; Chagas disease; disease carrier; domestic animal; genetics; parasitology; physiology; transmission; Triatoma; Trypanosoma cruzi; Argentina; Chaco [Argentina]; Aves; Didelphidae; Gallus gallus; Hexapoda; Rodentia; Triatoma sordida; Trypanosoma cruzi; Animals; Animals, Domestic; Argentina; Chagas Disease; Chickens; DNA, Kinetoplast; DNA, Protozoan; Insect Vectors; Insecticides; Polymerase Chain Reaction; Prevalence; Triatoma; Trypanocidal Agents; Trypanosoma cruzi; Turkeys
Año:2015
Volumen:143
Página de inicio:97
Página de fin:102
DOI: http://dx.doi.org/10.1016/j.actatropica.2014.12.010
Título revista:Acta Tropica
Título revista abreviado:Acta Trop.
ISSN:0001706X
CODEN:ACTRA
CAS:DNA, Kinetoplast; DNA, Protozoan; Insecticides; Trypanocidal Agents
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0001706X_v143_n_p97_Macchiaverna

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Citas:

---------- APA ----------
Macchiaverna, N.P., Gaspe, M.S., Enriquez, G.F., Tomassone, L., Gürtler, R.E. & Cardinal, M.V. (2015) . Trypanosoma cruzi infection in Triatoma sordida before and after community-wide residual insecticide spraying in the Argentinean Chaco. Acta Tropica, 143, 97-102.
http://dx.doi.org/10.1016/j.actatropica.2014.12.010
---------- CHICAGO ----------
Macchiaverna, N.P., Gaspe, M.S., Enriquez, G.F., Tomassone, L., Gürtler, R.E., Cardinal, M.V. "Trypanosoma cruzi infection in Triatoma sordida before and after community-wide residual insecticide spraying in the Argentinean Chaco" . Acta Tropica 143 (2015) : 97-102.
http://dx.doi.org/10.1016/j.actatropica.2014.12.010
---------- MLA ----------
Macchiaverna, N.P., Gaspe, M.S., Enriquez, G.F., Tomassone, L., Gürtler, R.E., Cardinal, M.V. "Trypanosoma cruzi infection in Triatoma sordida before and after community-wide residual insecticide spraying in the Argentinean Chaco" . Acta Tropica, vol. 143, 2015, pp. 97-102.
http://dx.doi.org/10.1016/j.actatropica.2014.12.010
---------- VANCOUVER ----------
Macchiaverna, N.P., Gaspe, M.S., Enriquez, G.F., Tomassone, L., Gürtler, R.E., Cardinal, M.V. Trypanosoma cruzi infection in Triatoma sordida before and after community-wide residual insecticide spraying in the Argentinean Chaco. Acta Trop. 2015;143:97-102.
http://dx.doi.org/10.1016/j.actatropica.2014.12.010