Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control.
BACKGROUND:Triatoma infestans -the principal vector of the infection that causes Chagas disease- defies elimination efforts in the Gran Chaco region. This study identifies the types of human-made or -used structures that are key sources of these bugs in the initial stages of house reinfestation afte...
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Online Access: | https://doi.org/10.1371/journal.pntd.0003238 https://doaj.org/article/a67a15fef2ec4870a7c47faf9ccedf0e |
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ftdoajarticles:oai:doaj.org/article:a67a15fef2ec4870a7c47faf9ccedf0e 2023-05-15T15:15:34+02:00 Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. Ricardo E Gürtler María C Cecere María Del Pilar Fernández Gonzalo M Vazquez-Prokopec Leonardo A Ceballos Juan M Gurevitz Uriel Kitron Joel E Cohen 2014-10-01T00:00:00Z https://doi.org/10.1371/journal.pntd.0003238 https://doaj.org/article/a67a15fef2ec4870a7c47faf9ccedf0e EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4191936?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0003238 https://doaj.org/article/a67a15fef2ec4870a7c47faf9ccedf0e PLoS Neglected Tropical Diseases, Vol 8, Iss 10, p e3238 (2014) Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2014 ftdoajarticles https://doi.org/10.1371/journal.pntd.0003238 2022-12-31T02:02:56Z BACKGROUND:Triatoma infestans -the principal vector of the infection that causes Chagas disease- defies elimination efforts in the Gran Chaco region. This study identifies the types of human-made or -used structures that are key sources of these bugs in the initial stages of house reinfestation after an insecticide spraying campaign. METHODOLOGY AND PRINCIPAL FINDINGS:We measured demographic and blood-feeding parameters at two geographic scales in 11 rural communities in Figueroa, northwest Argentina. Of 1,297 sites searched in spring, 279 (21.5%) were infested. Bug abundance per site and female fecundity differed significantly among habitat types (ecotopes) and were highly aggregated. Domiciles (human sleeping quarters) had maximum infestation prevalence (38.7%), human-feeding bugs and total egg production, with submaximal values for other demographic and blood-feeding attributes. Taken collectively peridomestic sites were three times more often infested than domiciles. Chicken coops had greater bug abundance, blood-feeding rates, engorgement status, and female fecundity than pig and goat corrals. The host-feeding patterns were spatially structured yet there was strong evidence of active dispersal of late-stage bugs between ecotopes. Two flight indices predicted that female fliers were more likely to originate from kitchens and domiciles, rejecting our initial hypothesis that goat and pig corrals would dominate. CONCLUSIONS AND SIGNIFICANCE:Chicken coops and domiciles were key source habitats fueling rapid house reinfestation. Focusing control efforts on ecotopes with human-fed bugs (domiciles, storerooms, goat corrals) would neither eliminate the substantial contributions to bug population growth from kitchens, chicken coops, and pig corrals nor stop dispersal of adult female bugs from kitchens. Rather, comprehensive control of the linked network of ecotopes is required to prevent feeding on humans, bug population growth, and bug dispersal simultaneously. Our study illustrates a demographic approach that may ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Argentina Chaco ENVELOPE(-60.583,-60.583,-63.033,-63.033) Figueroa ENVELOPE(-61.033,-61.033,-64.067,-64.067) PLoS Neglected Tropical Diseases 8 10 e3238 |
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 Ricardo E Gürtler María C Cecere María Del Pilar Fernández Gonzalo M Vazquez-Prokopec Leonardo A Ceballos Juan M Gurevitz Uriel Kitron Joel E Cohen Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
BACKGROUND:Triatoma infestans -the principal vector of the infection that causes Chagas disease- defies elimination efforts in the Gran Chaco region. This study identifies the types of human-made or -used structures that are key sources of these bugs in the initial stages of house reinfestation after an insecticide spraying campaign. METHODOLOGY AND PRINCIPAL FINDINGS:We measured demographic and blood-feeding parameters at two geographic scales in 11 rural communities in Figueroa, northwest Argentina. Of 1,297 sites searched in spring, 279 (21.5%) were infested. Bug abundance per site and female fecundity differed significantly among habitat types (ecotopes) and were highly aggregated. Domiciles (human sleeping quarters) had maximum infestation prevalence (38.7%), human-feeding bugs and total egg production, with submaximal values for other demographic and blood-feeding attributes. Taken collectively peridomestic sites were three times more often infested than domiciles. Chicken coops had greater bug abundance, blood-feeding rates, engorgement status, and female fecundity than pig and goat corrals. The host-feeding patterns were spatially structured yet there was strong evidence of active dispersal of late-stage bugs between ecotopes. Two flight indices predicted that female fliers were more likely to originate from kitchens and domiciles, rejecting our initial hypothesis that goat and pig corrals would dominate. CONCLUSIONS AND SIGNIFICANCE:Chicken coops and domiciles were key source habitats fueling rapid house reinfestation. Focusing control efforts on ecotopes with human-fed bugs (domiciles, storerooms, goat corrals) would neither eliminate the substantial contributions to bug population growth from kitchens, chicken coops, and pig corrals nor stop dispersal of adult female bugs from kitchens. Rather, comprehensive control of the linked network of ecotopes is required to prevent feeding on humans, bug population growth, and bug dispersal simultaneously. Our study illustrates a demographic approach that may ... |
format |
Article in Journal/Newspaper |
author |
Ricardo E Gürtler María C Cecere María Del Pilar Fernández Gonzalo M Vazquez-Prokopec Leonardo A Ceballos Juan M Gurevitz Uriel Kitron Joel E Cohen |
author_facet |
Ricardo E Gürtler María C Cecere María Del Pilar Fernández Gonzalo M Vazquez-Prokopec Leonardo A Ceballos Juan M Gurevitz Uriel Kitron Joel E Cohen |
author_sort |
Ricardo E Gürtler |
title |
Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
title_short |
Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
title_full |
Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
title_fullStr |
Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
title_full_unstemmed |
Key source habitats and potential dispersal of triatoma infestans populations in Northwestern Argentina: implications for vector control. |
title_sort |
key source habitats and potential dispersal of triatoma infestans populations in northwestern argentina: implications for vector control. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pntd.0003238 https://doaj.org/article/a67a15fef2ec4870a7c47faf9ccedf0e |
long_lat |
ENVELOPE(-60.583,-60.583,-63.033,-63.033) ENVELOPE(-61.033,-61.033,-64.067,-64.067) |
geographic |
Arctic Argentina Chaco Figueroa |
geographic_facet |
Arctic Argentina Chaco Figueroa |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
PLoS Neglected Tropical Diseases, Vol 8, Iss 10, p e3238 (2014) |
op_relation |
http://europepmc.org/articles/PMC4191936?pdf=render https://doaj.org/toc/1935-2727 https://doaj.org/toc/1935-2735 1935-2727 1935-2735 doi:10.1371/journal.pntd.0003238 https://doaj.org/article/a67a15fef2ec4870a7c47faf9ccedf0e |
op_doi |
https://doi.org/10.1371/journal.pntd.0003238 |
container_title |
PLoS Neglected Tropical Diseases |
container_volume |
8 |
container_issue |
10 |
container_start_page |
e3238 |
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1766345936665051136 |