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Abstract:

Triatoma sordida Stål (Hemiptera: Reduviidae), a secondary vector of Trypanosoma cruzi Chagas (Kinetoplastida: Trypanosomatidae), occasionally colonizes human sleeping quarters in Paraguay, Bolivia, and Brazil, whereas only sylvatic and peridomestic populations are found in Argentina. We carried out a cross-sectional survey of house infestation in a well-defined rural area of northeastern Argentina to identify the key habitats of T. sordida; describe its spatial distribution in an apparently undisturbed setting under no recent insecticide treatment and use metapopulation theory to investigate these spatially structured populations. Timed-manual searches in 2,177 georeferenced sites from 368 houses yielded T. sordida in 78 sites (house infestation prevalence, 19.9%). Most triatomines occurred in chicken nests, chicken coops, and trees where chickens roosted (prime habitats). Goat or sheep corrals and pig corrals had a lower fraction of occupied sites (occupancies) and abundance. Both occupancy and catch increased with increasing refuge availability according to multimodel inference with model averaging.The majority of suitable habitats were unoccupied despite their proximity to occupied sites.The site-specific occurrence of T. sordida and Triatoma infestans Klug (Hemiptera: Reduviidae) was positively and homogeneously associated over ecotopes, showing no evidence of interspecific interference. An incidence function metapopulation model (including intersite distances and vector carrying capacity) predicted a fivefold greater occupancy relative to the observed pattern, suggesting the latter represented a transient state. T. sordida failed to colonize human sleeping quarters, thrived in peridomestic habitats occupied by chickens, and had a limited occupancy likely related to a poor colonizing ability and the relative instability of its prime habitats. © The Author(s) 2017.

Registro:

Documento: Artículo
Título:Habitat-specific occupancy and a metapopulation model of triatoma sordida (Hemiptera: Reduviidae), a secondary vector of chagas disease, in northeastern Argentina
Autor:Lucía, I.R.-P.; Gaspe, M.S.; Enriquez, G.F.; Gürtler, R.E.
Filiación:Universidad de Buenos Aires, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Palabras clave:Chagas disease; Ecology; Population dynamics; Vector ecology
Año:2018
Volumen:55
Número:2
Página de inicio:370
Página de fin:381
DOI: http://dx.doi.org/10.1093/jme/tjx227
Título revista:Journal of Medical Entomology
Título revista abreviado:J. Med. Entomol.
ISSN:00222585
CODEN:JMENA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v55_n2_p370_Lucia

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Citas:

---------- APA ----------
Lucía, I.R.-P., Gaspe, M.S., Enriquez, G.F. & Gürtler, R.E. (2018) . Habitat-specific occupancy and a metapopulation model of triatoma sordida (Hemiptera: Reduviidae), a secondary vector of chagas disease, in northeastern Argentina. Journal of Medical Entomology, 55(2), 370-381.
http://dx.doi.org/10.1093/jme/tjx227
---------- CHICAGO ----------
Lucía, I.R.-P., Gaspe, M.S., Enriquez, G.F., Gürtler, R.E. "Habitat-specific occupancy and a metapopulation model of triatoma sordida (Hemiptera: Reduviidae), a secondary vector of chagas disease, in northeastern Argentina" . Journal of Medical Entomology 55, no. 2 (2018) : 370-381.
http://dx.doi.org/10.1093/jme/tjx227
---------- MLA ----------
Lucía, I.R.-P., Gaspe, M.S., Enriquez, G.F., Gürtler, R.E. "Habitat-specific occupancy and a metapopulation model of triatoma sordida (Hemiptera: Reduviidae), a secondary vector of chagas disease, in northeastern Argentina" . Journal of Medical Entomology, vol. 55, no. 2, 2018, pp. 370-381.
http://dx.doi.org/10.1093/jme/tjx227
---------- VANCOUVER ----------
Lucía, I.R.-P., Gaspe, M.S., Enriquez, G.F., Gürtler, R.E. Habitat-specific occupancy and a metapopulation model of triatoma sordida (Hemiptera: Reduviidae), a secondary vector of chagas disease, in northeastern Argentina. J. Med. Entomol. 2018;55(2):370-381.
http://dx.doi.org/10.1093/jme/tjx227