Spatial re-establishment dynamics of local populations of vectors of Chagas disease
Background: Prevention of Chagas disease depends mainly on control of the insect vectors that transmit infection. Unfortunately, the vectors have been resurgent in some areas. It is important to understand the dynamics of reinfestation where it occurs. Here we show how continuous- and discrete-time...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS25925_v3_n7_p_ZuDohna http://hdl.handle.net/20.500.12110/paper_NIS25925_v3_n7_p_ZuDohna |
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paper:paper_NIS25925_v3_n7_p_ZuDohna2023-06-08T16:40:04Z Spatial re-establishment dynamics of local populations of vectors of Chagas disease insecticide Argentina article Chagas disease controlled study intermethod comparison nonhuman population dispersal population dynamics probability seasonal variation Triatoma infestans vector control animal Argentina Chagas disease disease carrier disease transmission drug effect ecology ecosystem growth, development and aging human insect control methodology season time Triatoma Animals Argentina Chagas Disease Disease Vectors Ecology Ecosystem Humans Insect Control Seasons Time Factors Triatoma Background: Prevention of Chagas disease depends mainly on control of the insect vectors that transmit infection. Unfortunately, the vectors have been resurgent in some areas. It is important to understand the dynamics of reinfestation where it occurs. Here we show how continuous- and discrete-time models fitted to patch-level infestation states can elucidate different aspects of re-establishment. Triatoma infestans, the main vector of Chagas disease, reinfested sites in three villages in northwest Argentina after community-wide insecticide spraying in October 1992. Methodology/Principal Findings:Different methods of estimating the probabilities of bug establishment on each site were compared. The results confirmed previous results showing a 6-month time lag between detection of a new infestation and dispersal events. The analysis showed that more new bug populations become established from May to November than from November to May. This seasonal increase in bug establishment coincides with a seasonal increase in dispersal distance. In the fitted models, the probability of new bug establishment increases with increasing time since last detected infestation. Conclusions/Significance: These effects of season and previous infestation on bug establishment challenge our current understanding of T. infestans ecology and highlight important gaps in knowledge. Experiments necessary to close these gaps are discussed. © 2009 zu Dohna et al. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS25925_v3_n7_p_ZuDohna http://hdl.handle.net/20.500.12110/paper_NIS25925_v3_n7_p_ZuDohna |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
insecticide Argentina article Chagas disease controlled study intermethod comparison nonhuman population dispersal population dynamics probability seasonal variation Triatoma infestans vector control animal Argentina Chagas disease disease carrier disease transmission drug effect ecology ecosystem growth, development and aging human insect control methodology season time Triatoma Animals Argentina Chagas Disease Disease Vectors Ecology Ecosystem Humans Insect Control Seasons Time Factors Triatoma |
| spellingShingle |
insecticide Argentina article Chagas disease controlled study intermethod comparison nonhuman population dispersal population dynamics probability seasonal variation Triatoma infestans vector control animal Argentina Chagas disease disease carrier disease transmission drug effect ecology ecosystem growth, development and aging human insect control methodology season time Triatoma Animals Argentina Chagas Disease Disease Vectors Ecology Ecosystem Humans Insect Control Seasons Time Factors Triatoma Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| topic_facet |
insecticide Argentina article Chagas disease controlled study intermethod comparison nonhuman population dispersal population dynamics probability seasonal variation Triatoma infestans vector control animal Argentina Chagas disease disease carrier disease transmission drug effect ecology ecosystem growth, development and aging human insect control methodology season time Triatoma Animals Argentina Chagas Disease Disease Vectors Ecology Ecosystem Humans Insect Control Seasons Time Factors Triatoma |
| description |
Background: Prevention of Chagas disease depends mainly on control of the insect vectors that transmit infection. Unfortunately, the vectors have been resurgent in some areas. It is important to understand the dynamics of reinfestation where it occurs. Here we show how continuous- and discrete-time models fitted to patch-level infestation states can elucidate different aspects of re-establishment. Triatoma infestans, the main vector of Chagas disease, reinfested sites in three villages in northwest Argentina after community-wide insecticide spraying in October 1992. Methodology/Principal Findings:Different methods of estimating the probabilities of bug establishment on each site were compared. The results confirmed previous results showing a 6-month time lag between detection of a new infestation and dispersal events. The analysis showed that more new bug populations become established from May to November than from November to May. This seasonal increase in bug establishment coincides with a seasonal increase in dispersal distance. In the fitted models, the probability of new bug establishment increases with increasing time since last detected infestation. Conclusions/Significance: These effects of season and previous infestation on bug establishment challenge our current understanding of T. infestans ecology and highlight important gaps in knowledge. Experiments necessary to close these gaps are discussed. © 2009 zu Dohna et al. |
| title |
Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| title_short |
Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| title_full |
Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| title_fullStr |
Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| title_full_unstemmed |
Spatial re-establishment dynamics of local populations of vectors of Chagas disease |
| title_sort |
spatial re-establishment dynamics of local populations of vectors of chagas disease |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS25925_v3_n7_p_ZuDohna http://hdl.handle.net/20.500.12110/paper_NIS25925_v3_n7_p_ZuDohna |
| _version_ |
1769175835145666560 |