Rethinking the old hypothesis that new housing construction has an impact on the vector control of Triatoma infestans: A metapopulation analysis

Cavallo, María José; Amelotti, Ivana

doi:10.1016/j.actatropica.2020.105717

Cited by 3 publications

(2 citation statements)

References 62 publications

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“…Entomological surveillance carried out by the householders has been described by several authors and community participation favour the early detection of triatominos [e.g. 8,9,10,11,12,13,14,15,16]. In addition to the fact that householder collection of triatomines may be more sensitive than active search in some areas [10,13,17], especially when the infestation is of low density [12].…”

Section: Introductionmentioning

confidence: 99%

Impact involving the community in entomological surveillance of the Triatoma infestans vectorial control

Abrahan

Cavallo

Amelotti³

2020

Preprint

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BackgroundVectorial transmission is the principal way of Trypanosoma cruzi infection, the parasite that cause Chagas disease. In Argentina, Triatoma infestans is the principal vector, for this reason, vector control is the main strategy for the prevention of this illness. Provincial Program of Chagas La Rioja (PPCHLR) carries out entomological evaluation of domiciliary units (DU) and spraying those where T. infestans are found. The lack of government funds generated low visit frequency of PPCHLR, especially in areas with a low infestation that they were not prioritized. For this reason, seeking possible alternatives to complement control activities are necessary. Involving householders in entomologic evaluation would be a control alternative. The major objective was to determine the cost of entomological evaluation with and without community participation.MethodsFor entomological evaluation without community participation, PPCHLR data collected in February 2017 over 359 DU of Castro Barros Department (CBD) were used. For entomological evaluation with community participation, 434 DU of the same department were selected in November 2017. Each householder was trained in the insect collection that were kept in labelled plastic bags and recovered after two weeks to analyse T. cruzi presence in laboratory. Entomological evaluation costs with and without community participation over DU visited number, over DU evaluated number, and over DU sprayed were calculated and compared between methodologies. In addition, DU evaluated number out DU visited number was compared. ResultsThe results showed that the triatomines did not show evidence of T. cruzi infection. Costs in relation to DU visited, to those evaluated and to those sprayed, were lowered with community participation (p< 0.05). In addition, a greater number of DU evaluated in relation to those visited as well as greater surface were covered with community participation. ConclusionThe participation of the community in the infestation survey is an efficient complement of vertical control, allowing the spraying to be focused on infested houses and thus reducing costs and intervention times by PPCHLR.

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Section: Introductionmentioning

confidence: 99%

Impact involving the community in entomological surveillance of the Triatoma infestans vectorial control

Abrahan

Cavallo

Amelotti³

2020

Preprint

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“…In addition, triatomines were reported more by householders than by active searches [11]. Several authors have mentioned that community participation should be considered instead of active searches to detect T. infestans infestation foci, although recognizing that the effect is more pronounced in dwellings than in their surrounding structures [13][14][15][16].…”

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confidence: 99%

Impact of involving the community in entomological surveillance of Triatoma infestans (Klug, 1834) (Hemiptera, Triatominae) vectorial control

2021

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Background Vectorial transmission is the principal path of infection by Trypanosoma cruzi, the parasite that causes Chagas disease. In Argentina, Triatoma infestans is the principal vector; therefore, vector control is the main strategy for the prevention of this illness. The Provincial Program of Chagas La Rioja (PPCHLR) carries out entomological evaluation of domiciliary units (DUs) and spraying of those where T. infestans is found. The lack of government funds has led to low visitation frequency by the PPCHLR, especially in areas with a low infestation rate, which are not prioritized. Therefore, seeking possible alternatives to complement control activities is necessary. Involving householders in entomological evaluation could be a control alternative. The major objective was to determine the cost of entomological evaluation with and without community participation. Methods For entomological evaluation without community participation, PPCHLR data collected in February 2017 over 359 DUs of the Castro Barros Department (CBD) were used. For entomological evaluation with community participation, 434 DUs of the same department were selected in November 2017. Each householder was trained in collecting insects, which were kept in labeled plastic bags, recovered after 2 weeks, and analyzed in the laboratory for the presence of T. cruzi. Using householders' collection data, a spatial scan statistic was used to detect clusters of different T. infestans infestations. Entomological evaluation costs with and without community participation related to the numbers of DUs visited, DUs evaluated, and DUs sprayed were calculated and compared between methodologies. In addition, the number of DUs evaluated of the DUs visited was compared. Results According to the results, the triatomines did not show evidence of T. cruzi infection. Spatial analysis detected heterogeneity of T. infestans infestation in the area. Costs related to the DUs visited, evaluated, and sprayed were lower with community participation (p < 0.05). In addition, more DUs were evaluated in relation to those visited and a greater surface area was covered with community participation. Conclusion Participation of the community in the infestation survey is an efficient complement to vertical control, allowing the spraying to be focused on infested houses and thus reducing the PPCHLR's costs and intervention times.

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Spatial distribution of Triatoma dimidiata peridomestic colonies modulated by distance between susceptible microhabitat patches

Chan-Espinoza,

Ruiz-Piña,

Canché-Pool

et al. 2024

Acta Tropica

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Rethinking the old hypothesis that new housing construction has an impact on the vector control of Triatoma infestans: A metapopulation analysis

Cited by 3 publications

References 62 publications

Impact involving the community in entomological surveillance of the Triatoma infestans vectorial control

Impact involving the community in entomological surveillance of the Triatoma infestans vectorial control

Impact of involving the community in entomological surveillance of Triatoma infestans (Klug, 1834) (Hemiptera, Triatominae) vectorial control

Spatial distribution of Triatoma dimidiata peridomestic colonies modulated by distance between susceptible microhabitat patches

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