Field ecology of sylvatic Rhodnius populations (Heteroptera, Triatominae): risk factors for palm tree infestation in western Ecuador.
Fernando Abad-Franch,Fernando Abad-Franch,Francisco S. Palomeque,H M Aguilar,Michael A. Miles +4 more
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TLDR
An outline of ‘risk palm ecotopes’ and environmental management‐based strategies for the control of peridomestic, palm tree‐living vector populations are proposed.Abstract:
Most Rhodnius species (Triatominae) are primarily associated with palm trees. They maintain enzootic Trypanosoma cruzi transmission and are responsible for human infection (causing Chagas disease) through the Neotropics. Assessing whether individual palm traits (ecological and/or botanical) may increase the risk of palm infestation by triatomines is relevant in areas where bugs invade houses flying from peridomestic palms. We developed a novel fieldwork approach with that objective, and applied it to study infestation by sylvatic Rhodnius ecuadoriensis in 110 tagua palms (Phytelephas aequatorialis). Palm infestation (23% overall) was non-randomly distributed in our sample. Palms located in anthropic landscapes were frequently infested (>27%, n=92), whereas no bugs were collected from palms surveyed within forest remnants (n=18; P=0.01). The presence of abundant decaying vegetable matter (P=0.001) and (to a lesser extent) epiphytic plants (P=0.049) on palm crowns and stems increased the probability of infestation and was positively correlated with the apparent density of bug colonies (R2=0.68). A trend towards higher infestation rates in male palms (34% vs. 18%) could relate to female palm management (removal of infrutescences and vegetable debris) in areas where palm seeds are harvested. An outline of 'risk palm ecotopes' and environmental management-based strategies for the control of peridomestic, palm tree-living vector populations are proposed.read more
Citations
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Preventing disease through healthy environments: a global assessment of the burden of disease from environmental risks
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Ecology, evolution, and the long-term surveillance of vector-borne Chagas disease: A multi-scale appraisal of the tribe Rhodniini (Triatominae)
Fernando Abad-Franch,Fernando A. Monteiro,O Nicolás Jaramillo,Rodrigo Gurgel-Gonçalves,Rodrigo Gurgel-Gonçalves,Fernando Braga Stehling Dias,Liléia Diotaiuti +6 more
TL;DR: The data suggest that deforestation and the associated loss of habitat and host diversity might increase the frequency of vector-human contact (and perhaps Trypanosoma cruzi infection rates in vectors), and surveillance in central-northeastern Brazil should prioritise deforested landscapes where large palm trees occur near houses.
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Biogeography and evolution of Amazonian triatomines (Heteroptera: Reduviidae): implications for Chagas disease surveillance in humid forest ecoregions
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Host Life History Strategy, Species Diversity, and Habitat Influence Trypanosoma cruzi Vector Infection in Changing Landscapes
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References
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Journal Article
Revision of the Triatominae (Hemiptera, Reduviidae), and their significance as vectors of Chagas' disease.
H. Lent,Pedro W. Wygodzinsky +1 more
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TL;DR: This user-friendly and authoritative book will serve scientists, growers, and sightseers as a guide to the 67 genera and 550 species of naturally occurring palms found in the Americas as well as to amateur and professional growers of palms.
Journal ArticleDOI
An Insect Molecular Clock Dates the Origin of the Insects and Accords with Palaeontological and Biogeographic Landmarks
TL;DR: The study defines a robust nucleotide and amino acid mitochondrial molecular clock encompassing five insect orders, including the Blattaria, and explores Tilyard's theory proposing that the terrestrial transition of the aquatic arthropod ancestor to the insects is associated with a particular plant group (early vascular plants).
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Emerging Chagas disease in Amazonian Brazil.
José Rodrigues Coura,Angela Cristina Verissimo Junqueira,Octavio Fernandes,Sebastião Aldo da Silva Valente,Michael A. Miles +4 more
TL;DR: The status of Chagas disease in Amazonian Brazil, including known reservoirs and vectors, and the genetic diversity of T. cruzi is reviewed, indicating that the disease may be emerging as a wider public health problem in the region.
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