peridomestic distribution of triatoma garciabesi and triatoma guasayana in north-west argentina.the reduviid bugs triatoma garciabesi carcavallo et al. (hemiptera: reduviidae: triatominae), previously known as t. sordida ståhl in the semi-arid chaco region, and t. guasayana wygodzinsky & abalos, vectors of trypanosoma cruzi chagas (kinetoplastida: trypanosomatidae), were found to occupy wide but different ranges of ecotopes in the peridomestic environment. at amamá and nearby rural villages in north-western argentina, a combined total of 1233 specimens were collected from 325/2314 (14%) si ...200011129702
distribution, hosts, 16s rdna sequences and phylogenetic position of the neotropical tick amblyomma parvum (acari: ixodidae).the hosts, distribution, intraspecific genetic variation and phylogenetic position of amblyomma parvum (acari: ixodidae) have recently been re-assessed. data on this tick's hosts and distribution were obtained not only from existing literature but also from unpublished records. sequences of the ticks' mitochondrial 16s ribosomal dna (rdna) were used to evaluate genetic variation among specimens of a. parvum from different localities in argentina and brazil, and to explore the phylogenetic relati ...200818577332
The infra-red (IR) landscape of Triatoma infestans. An hypothesis about the role of IR radiation as a cue for Triatominae dispersal.This paper presents the infrared (IR) emission spectrum of hosts and habitats of Triatoma infestans in the chaco region of NW Argentina, representing the first attempt to correlate the natural infrared stimulus with the known behaviour of these blood-sucking insect, vectors of Trypanosoma cruzi - causative agent of Chagas disease. The study was carried out in two rural villages of La Rioja Province (Argentina). A FLYR i40 camera was used to obtain IR pictures which were analyzed to determine the ...201121856443
dispersal of triatoma infestans and other triatominae species in the arid chaco of argentina: flying, walking or passive carriage? the importance of walking females.the aim of this paper was to analyse the active dispersal of triatoma infestans and the role of chickens as passive carriers of this insect in peridomestic areas of la rioja, argentina. to measure active dispersal, monthly catches were made on six consecutive nights for five months (in the warm season) using light traps (for flying insects) and sticky dispersal barriers (for walking insects). the nutritional and reproductive states of adults were evaluated. over the course of the sampling period ...201121537686
environmental and demographic factors determining the spatial distribution of triatoma guasayana in peridomestic and semi-sylvatic habitats of rural northwestern argentina.triatoma guasayana (wygodzinsky & abalos), a sylvatic vector of chagas' disease, occurs in natural and peridomestic habitats of the dry chaco region of argentina, bolivia and paraguay. ten-year retrospective spatial analyses of peridomestic t. guasayana abundance in the rural community of amamá were expanded to the neighbouring community of trinidad in northwestern argentina. the distribution of t. guasayana in domiciles, peridomiciles (storerooms, chicken coops and corrals) and natural habitats ...200818816276
spatiotemporal patterns of reinfestation by triatoma guasayana (hemiptera: reduviidae) in a rural community of northwestern argentina.triatoma guasayana (wygodzinsky & abalos) is a secondary vector of trypanosoma cruzi (chagas), the etiologic agent of chagas disease, in the chaco region of argentina, bolivia, and paraguay. the spatial distribution of t. guasayana in a rural community in northwestern argentina is described and analyzed using very high spatial resolution satellite imagery, geographic information systems, and spatial statistics. since a 1992 residual spraying with insecticides of all houses, site-specific domesti ...200516119545
phenotypic variability and population structure of peridomestic triatoma infestans in rural areas of the arid chaco (western argentina): spatial influence of macro- and microhabitats.abstract triatoma infestans, one of the main vectors of trypanosoma cruzi, is strongly associated with rural human ecotopes. infested peridomestic places could act as a source of house infestation as a result of the movement of vectors among habitats. the quantitative study of phenotypic traits and nutritional variables could be informative about the population structure and the relative mobility of vectors. this is the first approach toward analyzing the phenetic characteristics of t. infestans ...201020925525
phenotypic diversity of triatoma infestans at the microgeographic level in the gran chaco of argentina and the andean valleys of bolivia.triatoma infestans (klug) is the main vector of trypanosoma cruzi, etiologic agent of chagas disease. the phenotype of the species varies at different geographic scales. the objective of this study was to compare the antennal phenotype of spatially close t. infestans populations and to evaluate its usefulness as a marker of exchange of individuals between populations. the antennal phenotype of 190 t. infestans from argentina and bolivia was analyzed using uni- and multivariate techniques. this s ...200818714865
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