Dispersal of female and male Aedes aegypti from discarded container habitats using a stable isotope mark-capture study design in South Texas

Juarez, Jose G.; Garcia-Luna, Selene; Chaves, Luis Fernando; Carbajal, Ester; Valdez, Edwin; Avila, Courtney; Tang, Wendy; Martin, Estelle; Barrera, Roberto; Hemme, Ryan R.; Mutebi, John-Paul; Vuong, Nga; Roark, E. Brendan; Maupin, C. R.; Badillo-Vargas, Ismael E.; Hamer, Gabriel L.

doi:10.1038/s41598-020-63670-9

Cited by 34 publications

(34 citation statements)

References 42 publications

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“…This was done to account for the effect of AGO coverage (measured as the number of traps and houses within an area based on the dispersal of female Ae. aegypti [38]) during the intervention periods (August to December), since it has been observed that these traps modulate the abundance of female Ae. aegypti [39].…”

Section: Discussionmentioning

confidence: 99%

The Eco-Bio-Social Factors That Modulate Aedes aegypti Abundance in South Texas Border Communities

Juarez

Garcia-Luna

Medeiros

et al. 2021

Insects

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Aedes aegypti control requires dedicated resources that are usually scarce, limiting the reach and sustainability of vector control programs. This generates a need to focus on areas at risk of disease transmission and also understand the factors that might modulate local mosquito abundance. We evaluated the eco-bio-social factors that modulate indoor and outdoor relative abundance of female Ae. aegypti in communities of South Texas. We conducted housing quality and Knowledge Attitudes and Practices surveys in households that were part of a weekly mosquito surveillance program in November of 2017 and 2018. Our results showed widespread knowledge of mosquitoes and Zika virus by our participants. However, less than 35% considered them as serious problems in this region. The presence of window-mounted air conditioning units increased the risk of female mosquito relative abundance indoors. An increase in outdoor relative abundance was associated with larger properties and a higher number of children between 6 to 17 years of age. Interestingly, we observed that an increasing number of children <5 years of age modulated both indoor and outdoor relative abundance, with a 52% increase indoors and 30% decrease outdoors. The low perception of mosquito and disease risk highlights engagement needs for vector-borne disease prevention in this region. The identified risk factors can help guide public health officials in their efforts to reduce human and vector contact.

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Section: Discussionmentioning

confidence: 99%

The Eco-Bio-Social Factors That Modulate Aedes aegypti Abundance in South Texas Border Communities

Juarez

Garcia-Luna

Medeiros

et al. 2021

Insects

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“…In this study, non-experimental households were inter-dispersed between the experimental households, and then possibly the unexposed males migrated to adjacent non-experimental households, which were not surveyed by human landing collections and therefore must be examined in future studies. Last, in a recent study conducted approximately at 15 km (in USA, across the border) from this study site, examined larvae marked with isotopes in tires that produced males collected in BG Sentinel traps at 220 m ( Juarez et al., 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Estimating Contact Rates Between Metarhizium anisopliae–Exposed Males With Female Aedes aegypti

Reyes-Villanueva

Russell

Rodríguez‐Pérez

2021

Front. Cell. Infect. Microbiol.

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IntroductionEffective control of Aedes aegypti will reduce the frequency and severity of outbreaks of dengue, chikungunya, and Zika; however, control programs are increasingly threatened by the rapid development of insecticide resistance. Thus, there is an urgent need for novel vector control tools, such as auto-dissemination of the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana. The aim of this study was to estimate contact rates of M. anisopliae-exposed males with wild female Ae. aegypti. As a control the contact rates of untreated males with wild females was contrasted.MethodsThe study was conducted in Reynosa, Mexico. The treatment and control households (n = 15 per group) were geographically separated by an arid and hot area that naturally prevented the flight of males between arms. In each control household, 40 M. anisopliae-exposed male Ae. aegypti were released per week for 8 weeks (specimens were exposed to a concentration of 5.96 × 107 conidia/cm2 for 24 h; n = 4,800 males). In each control household, 40 untreated males were released per week for 8 weeks (n = 4,800 males). All specimens were dust-marked prior to release. Mosquito abundance was monitored with human landing collections, and captured Ae. aegypti were examined for any dust-marking.ResultsIn the treatment households, the contact rate of Ae. aegypti females with marked, fungus-treated males was 14% (n = 29 females marked from 197). Where in the control households, the contact rate of females with marked, untreated males was only 6% (n = 22 marked from 365). In the treatment households the recapture rate of released males was at 5% and higher than that for the control households (which was 2%). Auto-dissemination of M. anisopliae from infected males to female Ae. aegypti was demonstrated through the recovery of an infected female from the floor of a household.ConclusionsOverall, the contact rate between M. anisopliae-infected males with the natural female population was 60% higher than for the control group of healthy males. The results provide further support to the release of fungus-exposed males as a potentially useful strategy against Ae. aegypti, though further research is required.

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“…Both sexes of Ae. aegypti typically disperse less than this and most estimates suggest 150-250 m is typical [123][124][125][126].…”

Section: Release Locationsmentioning

confidence: 99%

Sterile Insect Technique (SIT) against Aedes Species Mosquitoes: A Roadmap and Good Practice Framework for Designing, Implementing and Evaluating Pilot Field Trials

Oliva

Benedict²,

Collins

et al. 2021

Insects

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Aedes albopictus and Aedes aegypti are invasive mosquito species that impose a substantial risk to human health. To control the abundance and spread of these arboviral pathogen vectors, the sterile insect technique (SIT) is emerging as a powerful complement to most commonly-used approaches, in part, because this technique is ecologically benign, specific, and non-persistent in the environment if releases are stopped. Because SIT and other similar vector control strategies are becoming of increasing interest to many countries, we offer here a pragmatic and accessible ‘roadmap’ for the pre-pilot and pilot phases to guide any interested party. This will support stakeholders, non-specialist scientists, implementers, and decision-makers. Applying these concepts will ensure, given adequate resources, a sound basis for local field trialing and for developing experience with the technique in readiness for potential operational deployment. This synthesis is based on the available literature, in addition to the experience and current knowledge of the expert contributing authors in this field. We describe a typical path to successful pilot testing, with the four concurrent development streams of Laboratory, Field, Stakeholder Relations, and the Business and Compliance Case. We provide a graphic framework with criteria that must be met in order to proceed.

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Dispersal of female and male Aedes aegypti from discarded container habitats using a stable isotope mark-capture study design in South Texas

Cited by 34 publications

References 42 publications

The Eco-Bio-Social Factors That Modulate Aedes aegypti Abundance in South Texas Border Communities

The Eco-Bio-Social Factors That Modulate Aedes aegypti Abundance in South Texas Border Communities

Estimating Contact Rates Between Metarhizium anisopliae–Exposed Males With Female Aedes aegypti

Sterile Insect Technique (SIT) against Aedes Species Mosquitoes: A Roadmap and Good Practice Framework for Designing, Implementing and Evaluating Pilot Field Trials

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