Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina.
Fifty years of residual insecticide spraying to control Triatoma infestans in the Gran Chaco region of northern Argentina, Paraguay and Bolivia shows that vertically coordinated interventions aiming at full coverage have limited effects and are unsustainable. We quantified the spatial distribution o...
Published in: | PLoS Neglected Tropical Diseases |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science (PLoS)
2012
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pntd.0001788 https://doaj.org/article/d9951c55d3ab43ccadf15e01100213d2 |
id |
ftdoajarticles:oai:doaj.org/article:d9951c55d3ab43ccadf15e01100213d2 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:d9951c55d3ab43ccadf15e01100213d2 2023-05-15T15:15:03+02:00 Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. Gonzalo M Vazquez-Prokopec Cynthia Spillmann Mario Zaidenberg Ricardo E Gürtler Uriel Kitron 2012-01-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0001788 https://doaj.org/article/d9951c55d3ab43ccadf15e01100213d2 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3419179?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0001788 https://doaj.org/article/d9951c55d3ab43ccadf15e01100213d2 PLoS Neglected Tropical Diseases, Vol 6, Iss 8, p e1788 (2012) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2012 ftdoajarticles https://doi.org/10.1371/journal.pntd.0001788 2023-01-08T01:28:25Z Fifty years of residual insecticide spraying to control Triatoma infestans in the Gran Chaco region of northern Argentina, Paraguay and Bolivia shows that vertically coordinated interventions aiming at full coverage have limited effects and are unsustainable. We quantified the spatial distribution of T. infestans domestic infestation at the district level, identified environmental factors associated with high infestation and then explored the usefulness of risk maps for the spatial stratification of interventions.We performed spatial analyses of house infestation data collected by the National Chagas Service in Moreno Department, northern Argentina (1999-2002). Clusters of high domestic infestation occurred in the southwestern extreme of the district. A multi-model selection approach showed that domestic infestation clustered in areas of low elevation, with few farmlands, high density of rural houses, high mean maximum land surface temperature, large NDVI, and high percentage of degraded and deforested lands. The best model classified 98.4% of the communities in the training dataset (sensitivity, 93.3%; specificity, 95.4%). The risk map evidenced that the high-risk area only encompassed 16% of the district. By building a network-based transportation model we assessed the operational costs of spatially contiguous and spatially targeted interventions. Targeting clusters of high infestation would have reached -80% of all communities slated for full-coverage insecticide spraying, reducing in half the total time and economic cost incurred by a spatially contiguous strategy.In disperse rural areas where control programs can accomplish limited coverage, consideration of infestation hot spots can contribute to the design and execution of cost-effective interventions against Chagas disease vectors. If field validated, targeted vertical control in high risk areas and horizontal control in medium to low risk areas may provide both a logistically and economically feasible alternative to blanket vertical insecticide spraying ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Argentina Chaco ENVELOPE(-60.583,-60.583,-63.033,-63.033) Moreno ENVELOPE(-62.300,-62.300,-64.083,-64.083) PLoS Neglected Tropical Diseases 6 8 e1788 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
spellingShingle |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Gonzalo M Vazquez-Prokopec Cynthia Spillmann Mario Zaidenberg Ricardo E Gürtler Uriel Kitron Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
Fifty years of residual insecticide spraying to control Triatoma infestans in the Gran Chaco region of northern Argentina, Paraguay and Bolivia shows that vertically coordinated interventions aiming at full coverage have limited effects and are unsustainable. We quantified the spatial distribution of T. infestans domestic infestation at the district level, identified environmental factors associated with high infestation and then explored the usefulness of risk maps for the spatial stratification of interventions.We performed spatial analyses of house infestation data collected by the National Chagas Service in Moreno Department, northern Argentina (1999-2002). Clusters of high domestic infestation occurred in the southwestern extreme of the district. A multi-model selection approach showed that domestic infestation clustered in areas of low elevation, with few farmlands, high density of rural houses, high mean maximum land surface temperature, large NDVI, and high percentage of degraded and deforested lands. The best model classified 98.4% of the communities in the training dataset (sensitivity, 93.3%; specificity, 95.4%). The risk map evidenced that the high-risk area only encompassed 16% of the district. By building a network-based transportation model we assessed the operational costs of spatially contiguous and spatially targeted interventions. Targeting clusters of high infestation would have reached -80% of all communities slated for full-coverage insecticide spraying, reducing in half the total time and economic cost incurred by a spatially contiguous strategy.In disperse rural areas where control programs can accomplish limited coverage, consideration of infestation hot spots can contribute to the design and execution of cost-effective interventions against Chagas disease vectors. If field validated, targeted vertical control in high risk areas and horizontal control in medium to low risk areas may provide both a logistically and economically feasible alternative to blanket vertical insecticide spraying ... |
format |
Article in Journal/Newspaper |
author |
Gonzalo M Vazquez-Prokopec Cynthia Spillmann Mario Zaidenberg Ricardo E Gürtler Uriel Kitron |
author_facet |
Gonzalo M Vazquez-Prokopec Cynthia Spillmann Mario Zaidenberg Ricardo E Gürtler Uriel Kitron |
author_sort |
Gonzalo M Vazquez-Prokopec |
title |
Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
title_short |
Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
title_full |
Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
title_fullStr |
Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
title_full_unstemmed |
Spatial heterogeneity and risk maps of community infestation by Triatoma infestans in rural northwestern Argentina. |
title_sort |
spatial heterogeneity and risk maps of community infestation by triatoma infestans in rural northwestern argentina. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2012 |
url |
https://doi.org/10.1371/journal.pntd.0001788 https://doaj.org/article/d9951c55d3ab43ccadf15e01100213d2 |
long_lat |
ENVELOPE(-60.583,-60.583,-63.033,-63.033) ENVELOPE(-62.300,-62.300,-64.083,-64.083) |
geographic |
Arctic Argentina Chaco Moreno |
geographic_facet |
Arctic Argentina Chaco Moreno |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 6, Iss 8, p e1788 (2012) |
op_relation |
http://europepmc.org/articles/PMC3419179?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0001788 https://doaj.org/article/d9951c55d3ab43ccadf15e01100213d2 |
op_doi |
https://doi.org/10.1371/journal.pntd.0001788 |
container_title |
PLoS Neglected Tropical Diseases |
container_volume |
6 |
container_issue |
8 |
container_start_page |
e1788 |
_version_ |
1766345431005003776 |