Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

Parra-Henao, Gabriel; Suárez-Escudero, Laura C; González‐Caro, Sebastián

doi:10.1155/2016/1439090

Cited by 29 publications

(37 citation statements)

References 33 publications

(44 reference statements)

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“…infestans and R. prolixus), bringing insights into the distribution of the triatomine group as a whole. Specific studies were carried out for Venezuela [19,53], Argentina [53], Colombia [21,23] and Ecuador [54]. For Brazil, in particular, [10] analyzed the distribution of eight species in the center-west region and [55] analyzed the distribution of the species complex T. brasiliensis, which occurs mainly in the Brazilian northeast.…”

Section: Discussionmentioning

confidence: 99%

“…Following other authors [17][18][19][20][21], we have modeled the niche of each one of out 14 triatomine species using species distribution models (SDMs) built upon climatic variables related to temperature (in ºC) and precipitation (in mm). So, we used the 19 bioclimatic variables of the World Clim (www.worldclim.org; [37]), with resolution of 2.5 minutes (≈ 5km × 5km in equatorial regions).…”

Section: Climatic Variables and Human Population Density Datamentioning

confidence: 99%

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Influence of human population density on spatial distribution patterns of environmental suitability for triatomine vectors of Chagas disease

Eduardo

Santos

Rebouças

et al. 2019

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Previous work on Chagas Disease disease at large spatial scales has not explored how interaction with humans can affect projections for geographical distribution of environmental suitability of vector species. Here, we compare niche-based species distribution models with climatic variables as predictors (SDM clim ) and with climatic variables + human population density (SDM Human ). Our results show that accounting for human population density helps refine the models to finer geographical scales. Also, different spatial patterns of accumulated environmental suitability were obtained by SDM clim and SDM Human . Moreover, projections were more accurate for SDM Human than for SDM clim . Our results show that considering human populations in SDMs for epidemiologically relevant triatomiane species can improve our understanding of macroecology and biogeography of environmental suitability for vectors of Chagas disease.

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Section: Discussionmentioning

confidence: 99%

Section: Climatic Variables and Human Population Density Datamentioning

confidence: 99%

Influence of human population density on spatial distribution patterns of environmental suitability for triatomine vectors of Chagas disease

Eduardo

Santos

Rebouças

et al. 2019

Preprint

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“…Previous work has shown that vector distributions are influenced by climate, land cover 100 types and rural/urban classifications [19][20][21][22][23][24]. Environmental variables for these three 101 data types were obtained at a nominal resolution of 5 × 5 kilometres.…”

Section: Environmental Variables 99mentioning

confidence: 99%

“…Earlier studies [19,20,22,23,25], most notably [24], have modelled the distributions 279 of some of these species but only in specific regions, states or countries. Additionally, 280 comparisons with the previous work are limited because of differences in methodology, 281 data sets and spatial extent under consideration.…”

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confidence: 99%

Modelling geospatial distributions of the triatomine vectors of Trypanosoma cruzi in Latin America

Bender

Python

Lindsay

et al. 2019

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Approximately 150 triatomine species are known to be infected with the Chagas parasite, Trypanosoma cruzi, but they differ in the risk they pose to human populations. The largest risk comes from species that have a domestic life cycle and these species have been targeted by indoor residual spraying campaigns, which have been successful in many locations. It is now important to consider residual transmission that may be linked to persistent populations of dominant vectors, or to secondary or minor vectors. The aim of this project was to define the geographical distributions of the community of triatomine species in Latin America. Presence-only data with over 12, 000 observations of triatomine vectors were extracted from a public database and target-group background data were generated to account for sampling bias in the presence data. Geostatistical regression was then applied to estimate species distributions and fine-scale distribution maps were generated for thirty triatomine vector species. The results for Panstrongylus geniculatus, P. megistus, Triatoma barberi, T. brasiliensis, and T. pseudomaculata are presented in detail and the model validation results for each of the 30 species are presented in full. The predictive maps for all species are made publicly available so that they can be used to assess the communities of vectors present within different regions of the endemic zone. The maps are presented alongside key indicators for the capacity of each species to transmit T. cruzi to humans. These indicators include infection prevalence, evidence for human blood meals, and colonisation or invasion of homes. A summary of these indicators shows that the majority of the 30 species mapped by this study have the potential to transmit T. cruzi to humans. Author summaryThe Pan American Health Organisation's Strategy and Plan of Action for Chagas Disease Prevention, Control and Care highlights the importance of eliminating those triatomine vector species that colonise homes, and has had great success in many locations. Since indoor residual spraying campaigns have targeted these species, their importance relative to other vectors has diminished and their geographical distributions August 16, 2019 1/18 may also have changed. It is now vital to consider the full community of vector species, including previously dominant vectors as well as secondary or minor vector species, in order to target residual transmission to humans. Our aim was to define the geographical distributions of the most commonly reported triatomine species in Latin America. We extracted reports of triatomine vector species observed at specific locations from a public database and we used a geostatistical model to generate fine-scale predictive maps for thirty triatomine vector species. We present these maps alongside a summary of key indicators related to the capacity of each species to transmit the Chagas parasite to humans. We show that most of the 30 species that we have mapped pose a potential threat to human populations.

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“…ENM have been previously used to estimate Rhodnius species distribution: R. neglectus , R. nasutus , R. pictipes and R. robustus in Brazil [32–35]; R. pallescens in Colombia, Panamá, Costa Rica, and Nicaragua [36,37], and Rhodnius prolixus in Colombia [37] and Guatemala [38]. Those studies did not considered biological interactions as predictors for Rhodnius distributions.…”

Section: Introductionmentioning

confidence: 99%

Co-occurrence or dependence? Using spatial analyses to explore the interaction between palms and triatomines (Chagas disease insect vectors)

Calderón

González

2019

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BackgroundTriatomine kissing bugs are responsible for the vectorial transmission of the parasite Trypanosoma cruzi, etiological agent of Chagas disease, a zoonosis affecting 10 million people and with 25 million at risk of infection. Triatomines are associated with particular habitats that offer shelter and food. Several triatomine species of the Rhodnius genus have close association with palm crowns, where bugs can obtain blood from the associated fauna. The Rhodnius - palm interaction has been reported in several places of Central and South America. However, the association in the distributions of Rhodnius species and palms has not been quantitatively determined.Methodology/Principal FindingsBroad distributions of eight Rhodnius species and 16 palm species with Rhodnius-infestation reports were estimated using Ecological Niche Models. Rhodnius species distributions in their total range were compared to their distributions in areas with palms. Rhodnius species presence was found to be higher in areas with palms. However, that tendency notoriously depended on palm species. Rhodnius species presence increased several times in areas with particular palm species. Moreover, a possible relationship was found between Rhodnius and palm species richness, indicating the Amazon region as the convergent region where several Rhodnius and palm species intersected. Finally, palm distribution was evaluated as predictor of Rhodnius species distributions, but their inclusion in the distributions models did not improve their performance.Conclusions/SignificanceThe distributions of some Rhodnius and palm species showed a high spatial association, which can be based on species interaction or niche similarity. Based on distribution convergence, the Amazon region appear to be the origin of the Rhodnius-palm association. The direct relationship between palms and Rhodnius species richness could be based on the habitat heterogeneity offered by different palm species. Despite spatial association, palm presence would not be a relevant predictor of Rhodnius species distributions in comparison to other environmental variables. Inclusion of other input data as hosts’ distribution could help to increase model predictability.Author summaryThe infestation of palms with Rhodnius genus kissing bugs (Chagas disease vectors) is important from the public health perspective, since insects living in palms can infest nearby houses. The migration of these bugs to households could threaten vector control programs since reinfestation of treated dwellings can occur. Association between Rhodnius and palms species distributions has been previously suggested but never quantitatively determined. The strong association between one palm species and one Rhodnius species can be used as a factor to predict the presence of Rhodnius bugs in definite areas. In this study, we estimated by models the distributions of eight Rhodnius species and 18 Rhodnius-infested palm species. Rhodnius distributions models showed a biased presence toward areas with certain palm species. That specific association was very strong in some cases; however, the presence of associated palm species was used in Rhodnius distributions models, but that did not improve the predictability of the models. Palm presence appear to be not essential for the Rhodnius current distribution because they could inhabit other habitats; but that association could be relevant to the Rhodnius evolutionary and biogeographic history.

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Potential Distribution of Chagas Disease Vectors (Hemiptera, Reduviidae, Triatominae) in Colombia, Based on Ecological Niche Modeling

Cited by 29 publications

References 33 publications

Influence of human population density on spatial distribution patterns of environmental suitability for triatomine vectors of Chagas disease

Influence of human population density on spatial distribution patterns of environmental suitability for triatomine vectors of Chagas disease

Modelling geospatial distributions of the triatomine vectors of Trypanosoma cruzi in Latin America

Co-occurrence or dependence? Using spatial analyses to explore the interaction between palms and triatomines (Chagas disease insect vectors)

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