Socioeconomic profile and perceptions of Chagas disease in indigenous communities of the Paraguayan Chaco

Arrom-Suhurt, Carmen Marina; Arrom-Suhurt, Cristina H.; Rolón, Míriam; Vega-Gómez, Maria Celeste; Arias, Antonieta Rojas de

doi:10.1007/s10389-018-1001-x

Cited by 3 publications

(4 citation statements)

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“…Among the dwellings evaluated for construction quality, 83% (224/270) consisted of just one room (excluding latrines and kitchens) and usually inhabitants slept outside. Most householders (83%) prepared their food outdoors and the bathroom was generally outside the house (98.5%) [ 36 ]. Only 9.3% of houses (25/270) had structures other than the kitchen and latrines in the peridomicile, e.g.…”

Section: Resultsmentioning

confidence: 99%

“…infestans reinfestation in four rural communities, following an indoor residual spray (IRS) program. To our knowledge this is the first time this phenomenon has been rigorously investigated in the Paraguayan Chaco and interpreted in the context of concomitant human activity [ 18 , 26 , 36 ]. Our understanding of T .…”

Section: Discussionmentioning

confidence: 99%

“…In the framework of a socio-economic survey carried out previously in the four study communities, the quality of construction materials of 270 houses was evaluated according to the CALMAT quality index used by the National Institute of Statistics and Censuses (INDEC) of Argentina [ 39 ]. The methodology used has been explained elsewhere [ 36 ].…”

Section: Methodsmentioning

confidence: 99%

“…cruzi infection and triatomine infestation, composed mainly of indigenous people belonging to different ethnic groups [ 34 , 35 ]. Local indigenous houses are typically single-roomed, without peridomicile areas [ 36 ] and are directly adjacent to the dry forest. These indigenous groups live on a fragile subsistence economy; many are hunter-gatherers that often enter the forest to hunt wild animals, collect fruits and honey for consumption, as well as to prepare charcoal for sale [ 18 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of Triatoma infestans populations in the Paraguayan Chaco: Population genetic analysis of household reinfestation following vector control

Arias¹,

Messenger

Rolón³

et al. 2022

PLoS ONE

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Background Although domestic infestations by Triatoma infestans have been successfully controlled across Latin America, in areas of the Gran Chaco region, recurrent post-spraying house colonization continues to be a significant challenge, jeopardizing Chagas disease vector control and maintaining active Trypanosoma cruzi transmission. Methodology/Principal findings To investigate the dynamics of triatomine reinfestation in a rural area of the Paraguayan Chaco, genetic characterization (based on 10 microsatellite loci and cytochrome B sequence polymorphisms) was performed on baseline and reinfestant T. infestans (n = 138) from four indigenous communities and adjacent sylvatic sites. House quality and basic economic activities were assessed across the four communities. Significant genetic differentiation was detected among all baseline triatomine populations. Faster reinfestation was observed in the communities with higher infestation rates pre-spraying. Baseline and reinfestant populations from the same communities were not genetically different, but two potentially distinct processes of reinfestation were evident. In Campo Largo, the reinfestant population was likely founded by domestic survivor foci, with reduced genetic diversity relative to the baseline population. However, in 12 de Junio, reinfestant bugs were likely derived from different sources, including survivors from the pre-spraying population and sympatric sylvatic bugs, indicative of gene-flow between these habitats, likely driven by high human mobility and economic activities in adjacent sylvatic areas. Conclusions/Significance Our results demonstrate that sylvatic T. infestans threatens vector control strategies, either as a reinfestation source or by providing a temporary refuge during insecticide spraying. Passive anthropogenic importation of T. infestans and active human interactions with neighboring forested areas also played a role in recolonization. Optimization of spraying, integrated community development and close monitoring of sylvatic areas should be considered when implementing vector control activities in the Gran Chaco.

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Section: Resultsmentioning

confidence: 99%