Author:
Enriquez Gustavo Fabián,Cecere María Carla,Alvarado-Otegui Julián Antonio,Alvedro Alejandra,Gaspe María Sol,Laiño Mariano Alberto,Gürtler Ricardo Esteban,Cardinal Marta Victoria
Abstract
Abstract
Background
We conducted a matched-pairs trial of three methods for detecting house infestation with triatominae bugs in a well-defined endemic rural area in the Argentine Chaco.
Methods
The three methods included a simple double-sided adhesive tape (ST) installed near host resting sites; timed-manual collections with a dislodging aerosol (TMC, the reference method used by vector control programmes), and householders’ bug notifications (HN). Triatomine infestations were evaluated in 103 sites of 54 houses, including domiciles, kitchens and storerooms.
Results
In domiciles where Triatoma infestans was collected, sensitivity of each single method decreased from 79% by ST and 77% by HN, to 57% by TMC, and increased to 92% when ST was combined with HN. In peridomestic kitchens and storerooms, TMC was relatively as sensitive as ST and significantly more sensitive than HN. On average, the number of bugs recovered by ST was 0.94 times that collected by TMC. The ST mainly collected early-instar nymphs whereas TMC yielded late (larger) stages. Triatomines caught by ST had significantly lower mean weight-to-length ratios and lower blood-feeding rates than those caught by TMC, suggesting the ST intercepted and trapped vectors seeking a blood meal host.
Conclusions
The ST may effectively replace TMC for detecting T. infestans in domiciles, and is especially apt for early detection of low-density domestic infestations in the frame of community-based surveillance or elimination programmes; decision making on whether an area should be targeted for full-coverage insecticide spraying, and to corroborate that extant conditions are compatible with the interruption of vector-borne transmission.
Funder
Fondo para la Investigación Científica y Tecnológica
Secretaria de Ciencia y Tecnica, Universidad de Buenos Aires
Fundación Bunge y Born
Publisher
Springer Science and Business Media LLC
Subject
Infectious Diseases,Parasitology
Cited by
18 articles.
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