Arboviruses in Yucatan, Mexico

Villegas-Chim, Josué; Gómez–Dantés, Héctor; PaviaRuz, Norma; Vera-Gamboa, Ligia; Rafful-Ceballos, María José; Ramos-Valencia, Jimmy Emmanuel; Manrique-Saide, Pablo

doi:10.4324/9780429456558-7

Cited by 2 publications

(1 citation statement)

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“…In the present study, ITS was very well accepted by the community, with a perceived efficacy on reductions on mosquito abundance and biting, and furthermore, reduction in other domestic insect pests; evidence that reinforces the positive outcomes found in other studies [ 20 , 42 ]. In the case of ITS, two main limiting factors for its accessibility by the community have been identified.…”

Section: Discussionsupporting

confidence: 88%

Insecticide-treated house screening protects against Zika-infected Aedes aegypti in Merida, Mexico

et al. 2021

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Background The integration of house-screening and long-lasting insecticidal nets, known as insecticide-treated screening (ITS), can provide simple, safe, and low-tech Aedes aegypti control. Cluster randomised controlled trials in two endemic localities for Ae. aegypti of south Mexico, showed that ITS conferred both, immediate and sustained (~2 yr) impact on indoor-female Ae. aegypti infestations. Such encouraging results require further validation with studies quantifying more epidemiologically-related endpoints, including arbovirus infection in Ae. aegypti. We evaluated the efficacy of protecting houses with ITS on Ae. aegypti infestation and arbovirus infection during a Zika outbreak in Merida, Yucatan, Mexico. Methodology/Principal findings A two-arm cluster-randomised controlled trial evaluated the entomological efficacy of ITS compared to the absence of ITS (with both arms able to receive routine arbovirus vector control) in the neighbourhood Juan Pablo II of Merida. Cross-sectional entomological surveys quantified indoor adult mosquito infestation and arbovirus infection at baseline (pre-ITS installation) and throughout two post-intervention (PI) surveys spaced at 6-month intervals corresponding to dry/rainy seasons over one year (2016–2017). Household-surveys assessed the social reception of the intervention. Houses with ITS were 79–85% less infested with Aedes females than control houses up to one-year PI. A similar significant trend was observed for blood-fed Ae. aegypti females (76–82%). Houses with ITS had significantly less infected female Ae. aegypti than controls during the peak of the epidemic (OR = 0.15, 95%CI: 0.08–0.29), an effect that was significant up to a year PI (OR = 0.24, 0.15–0.39). Communities strongly accepted the intervention, due to its perceived mode of action, the prevalent risk for Aedes-borne diseases in the area, and the positive feedback from neighbours receiving ITS. Conclusions/Significance We show evidence of the protective efficacy of ITS against an arboviral disease of major relevance, and discuss the relevance of our findings for intervention adoption.

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Section: Discussionsupporting

confidence: 88%

Insecticide-treated house screening protects against Zika-infected Aedes aegypti in Merida, Mexico

et al. 2021

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Community Engagement and Social Assessment for Wolbachia-Based Suppression of Natural Populations of Aedes aegypti: The Mexican Experience

Josue¹,

Martín-Park²,

Puerta-Guardo³

et al. 2023

Mosquito Research - Recent Advances in Pathogen Interactions, Immunity, and Vector Control Strategies

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The Wolbachia-based approach is under evaluation as a control strategy against Aedes aegypti in Mexico. From 2017 to 2019, we performed a pilot study to evaluate an open-field mass-release of wAlbB-infected Ae. aegypti male mosquitoes, as part of an integrated vector management (IVM) plan led by the Ministry of Health in Mexico to suppress natural populations of Ae. aegypti in southern Mexico. Community engagement and social evaluation were part of the key activities conducted. Overall, results showed the positive benefits of this Wolbachia-based method in the reduction of Aedes mosquitoes (90%). Mosquito’s nuisance at bedtime and the increasing circulation of mosquitoes during the releasing days were reported as the negative perceptions of this method. Importantly, participants understood the difference between wild mosquitoes and those released as part of the project, as well as the importance of the IVM. A significant number of the population accepted and supported the project, and feedback was given to improve future mosquito-releasing activities. The social license was a key factor in the success of the intervention and should be part of innovative paradigms for mosquito-vector control strategies involving community engagement. We outline the Mexican experience of community engagement and social assessment in implementing a Wolbachia-based strategy.

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Arboviruses in Yucatan, Mexico

Cited by 2 publications

References 1 publication

Insecticide-treated house screening protects against Zika-infected Aedes aegypti in Merida, Mexico

Insecticide-treated house screening protects against Zika-infected Aedes aegypti in Merida, Mexico

Community Engagement and Social Assessment for Wolbachia-Based Suppression of Natural Populations of Aedes aegypti: The Mexican Experience

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