Insecticide and community interventions to control Triatoma dimidiata in localities of the State of Veracruz, Mexico

Wastavino, Gloria Rojas; Cabrera-Bravo, Margarita; Torre, G. Carbajal-De la; Vences-Blanco, Mauro Omar; Hernández, Adela Ruiz; Torres, M; Gómez, Y.; Mesa, Alejandro Escobar; Schettino, Paz María Salazar

doi:10.1590/s0074-02762004000400015

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…This study shows that traditional dwellings improvement to avoid triatomine infestation (Rojas-Wastavino et al 2004) is not effective against T. mexicana because vectors were irrespectively collected in houses built with risky and non-risky materials. We found only 1.4% and 6.6% of the dwellings with vectors inside (8/545), and in the surroundings (36/545), respectively.…”

Section: Resultsmentioning

confidence: 86%

Triatoma mexicana (Hemiptera: Reduviidae) in Guanajuato, Mexico: house infestation and seasonal variation

Schettino

Piña

Wastavino

et al. 2007

Mem. Inst. Oswaldo Cruz

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Section: Resultsmentioning

confidence: 86%

Triatoma mexicana (Hemiptera: Reduviidae) in Guanajuato, Mexico: house infestation and seasonal variation

Schettino

Piña

Wastavino

et al. 2007

Mem. Inst. Oswaldo Cruz

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“…[9][10][11] In Mexico, three cycles of spraying decreased the indoor infestation rate from > 90 to 0%. 12 While some cases could be treated with single insecticide spaying, others required multiple insecticide spraying. This study investigated the long-term effectiveness of single insecticide spraying and the impact of double and triple insecticide spraying on the infestation and colonization of T. dimidiata with reference to the geographical distribution of the target villages.…”

Section: Introductionmentioning

confidence: 99%

Impact of Single and Multiple Residual Sprayings of Pyrethroid Insecticides Against Triatoma Dimidiata (Reduviiade; Triatominae), the Principal Vector of Chagas Disease in Jutiapa, Guatemala

Hashimoto¹,

Cordón-Rosales²,

Trampe³

et al. 2006

The American Journal of Tropical Medicine and Hygiene

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This study investigated the impact of single, double, and triple insecticide sprayings on indoor infestation of Triatoma dimidiata in Jutiapa, Guatemala. Up to three successive insecticide sprayings were applied in villages, where the indoor infestation index was > 5% before each spraying round or located adjacent to the persistently infested villages. Among 64 villages with single spraying, the mean indoor infestation index reduced from 20.8% to 1.4% after 12 months, but rose to 8.1% after 33 months. In 40 double-sprayed villages, it decreased from 41.9% to 11.9% by the first spraying and to 4.8% by the second spraying. For 12 villages with triple spraying, it reduced from 40.6% to 13.2%, 10.9%, and 4.1% through each spraying round. Geographic analysis showed that originally highly infested villages were spatially clustered and were likely to remain infested after the sprayings. Indoor infestation of T. dimidiata can be controlled with less than three rounds of spraying.

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“…Indeed, it is now well established that the efficacy of conventional insecticide spraying is short-lived in the case of non-domiciliated triatomines seasonally infesting houses. [28][29][30][31] Previous control efforts in Veracruz indicated that three insecticide applications 8 months apart were required to reduce T. dimidiata infestation, 32 but there was no follow-up to assess potential re-infestation after interrupting control interventions. Re-infestation by T. dimidiata following insecticide spraying has been frequently observed in the Yucatan peninsula, Mexico, 28,31 as well as in Guatemala.…”

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confidence: 99%

House Infestation Dynamics and Feeding Sources of Triatoma dimidiata in Central Veracruz, Mexico

Torres-Montero

López‐Monteon²,

Dumonteil³

et al. 2012

The American Journal of Tropical Medicine and Hygiene

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Abstract. Chagas disease is endemic in the state of Veracruz, Mexico, and we investigated here the dynamics of house infestation by Chagas disease vectors to understand disease transmission and design effective control interventions. Bug collections in 42 rural villages confirmed the widespread distribution of Triatoma dimidiata in central Veracruz. Unexpectedly, collection data further indicated a clear pattern of seasonal infestation by mostly adult bugs. Analysis of feeding sources with a polymerase chain reaction-heteroduplex assay indicated a frequent feeding on humans, in agreement with the high seroprevalence previously observed. Feeding sources also confirmed a significant dispersal of bugs between habitats. High dispersal capabilities and seasonal infestation may thus be a shared characteristic of several of the T. dimidiata sibling species from this complex. It would thus be critical to adapt vector control interventions to this behavior to improve their efficacy and sustainability, as the control of T. dimidiata has been notoriously challenging.

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Insecticide and community interventions to control Triatoma dimidiata in localities of the State of Veracruz, Mexico

Abstract: Three different interventions to control

Cited by 14 publications

References 9 publications

Triatoma mexicana (Hemiptera: Reduviidae) in Guanajuato, Mexico: house infestation and seasonal variation

Triatoma mexicana (Hemiptera: Reduviidae) in Guanajuato, Mexico: house infestation and seasonal variation

Impact of Single and Multiple Residual Sprayings of Pyrethroid Insecticides Against Triatoma Dimidiata (Reduviiade; Triatominae), the Principal Vector of Chagas Disease in Jutiapa, Guatemala

House Infestation Dynamics and Feeding Sources of Triatoma dimidiata in Central Veracruz, Mexico

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