A Prospective Study of the Effects of Ultralow Volume (ULV) Aerial Application of Malathion on Epidemic Plasmodium falciparum Malaria

Taylor, Roger R.; Solis, Marc; Weathers, David B.; Taylor, John W.

doi:10.4269/ajtmh.1975.24.188

Cited by 17 publications

(4 citation statements)

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“…Malathion was sprayed at a dosage of 4.5 fluid ounces per acre in the morning. The spray reduced the populations of adult A. albimanus to less than 1 % of pre-spray levels and interrupted epidemic transmission of P. falciparum malaria [ 78 ]. Prior to spraying, the incidence of malaria was similar in sprayed and unsprayed areas (176.1 and 198.7 cases/month/10,000 population, respectively).…”

Section: Resultsmentioning

confidence: 99%

Malaria vector research and control in Haiti: a systematic review

Frederick¹,

Jean²,

Lemoine³

et al. 2016

Malar J

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BackgroundHaiti has a set a target of eliminating malaria by 2020. However, information on malaria vector research in Haiti is not well known. This paper presents results from a systematic review of the literature on malaria vector research, bionomics and control in Haiti.MethodsA systematic search of literature published in French, Spanish and English languages was conducted in 2015 using Pubmed (MEDLINE), Google Scholar, EMBASE, JSTOR WHOLIS and Web of Science databases as well other grey literature sources such as USAID, and PAHO. The following search terms were used: malaria, Haiti, Anopheles, and vector control.ResultsA total of 132 references were identified with 40 high quality references deemed relevant and included in this review. Six references dealt with mosquito distribution, seven with larval mosquito ecology, 16 with adult mosquito ecology, three with entomological indicators of malaria transmission, eight with insecticide resistance, one with sero-epidemiology and 16 with vector control. In the last 15 years (2000–2015), there have only been four published papers and three-scientific meeting abstracts on entomology for malaria in Haiti. Overall, the general literature on malaria vector research in Haiti is limited and dated.DiscussionEntomological information generated from past studies in Haiti will contribute to the development of strategies to achieve malaria elimination on Hispaniola. However it is of paramount importance that malaria vector research in Haiti is updated to inform decision-making for vector control strategies in support of malaria elimination.

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Section: Resultsmentioning

confidence: 99%

Malaria vector research and control in Haiti: a systematic review

Frederick¹,

Jean²,

Lemoine³

et al. 2016

Malar J

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“…Vector abundance, biting contact, and survivorship are fundamental quantifiable parameters, expected to be in a positive-linear relationship with arbovirus transmission frequency 49 . Robust field evidence suggested that ULV applications suppressing vector populations led to the immediate decline of transmission incidence in the following four weeks 50 , while a rebound effect on the population was observed afterward. We found that more than 87.4% of total blood-engorged mosquitoes belonged to the genera Culex and Aedes , with Ae.…”

Section: Discussionmentioning

confidence: 99%

Changes in mosquito species and blood meal composition associated with adulticide applications

Kim,

Burkett-Cadena,

Reeves

2023

Sci Rep

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Although adulticide application is a pillar in the integrated management of nuisance and vector mosquitoes, non-target effects of adulticide applications within ecosystems are a substantial concern. However, the impacts of adulticide applications on non-target organisms are not necessarily detrimental, and in some cases, may provide benefits to certain organisms or wildlife. Here, we hypothesized that adulticide applications have beneficial non-target impacts on vertebrate wildlife through reduced biting pressure. To test this, we collected mosquitoes from ultra-low volume Permanone-treated (intervention) and untreated (reference) areas and assessed mosquito abundance and diversity, and abundance of blood-engorged female mosquitoes. We performed DNA barcoding analysis on mosquito blood meals to identify host species. Our results demonstrated a significant reduction in mosquito abundance by 58.9% in the intervention areas, taking into account the reduction in reference areas. Consequently, this decline led to a 64.5% reduction in the abundance of blood-engorged females. We also found a temporal dynamic of mosquito composition driven by mosquito control actions in which different mosquito species became dominant at treated sites while composition at reference areas remained similar during the same period. The present study suggests that the beneficial effects of mosquito control treatments for humans extend to other vertebrates, which represents an unstudied and rarely recognized non-target impact.

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“…In outside environments, factors such as tree canopy and buildings have been shown to reduce aerosol penetration (Mount et al 1970a;Taylor et al 1975;Perich et al 1992Perich et al , 2000. However, information on how speciÞc physical features inside buildings impact aerosol insecticide dispersal is limited.…”

Section: Discussionmentioning

confidence: 99%

Spatial Pattern in Aerosol Insecticide Deposition Inside a Flour Mill

2014

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Aerosol insecticides are commonly used for management of stored-product pests inside food facilities, but the physical complexity of the interior of most food facilities may inßuence the dispersal and deposition of droplets and create spatial variation in dosage. The spatial pattern in aerosol deposition was evaluated inside a ßour mill using a high density grid of bioassay insects. Three insecticides, Aerotech with NyGuard and Pyrocide 100 ϩ Diacon II, both pyrethrin and insect growth regulator combinations, and Vap20, an organophosphate, were evaluated at normal (27ЊC) and high (40ЊC) target temperatures. Using a newly developed efÞcacy index, there was spatial pattern to aerosol deposition detected for the pyrethrin insecticides and the pattern differed between aerosols and temperatures. Walls and corners, especially behind the direction of application, were especially vulnerable to zones of lower efÞcacy, and open areas in center of the room tended to have the highest efÞcacy. The organophosphate insecticide provided complete efÞcacy at all bioassay dish locations, probably due in part to its vapor toxicity. Using boxes 1 m in depth and 5, 10, or 20 cm in height and open on only one end, it was shown that aerosol dispersal under horizontal surfaces could be impacted by gap height, aerosol, and temperature. These results show the potential for spatial variation in aerosol efÞcacy within a food facility and identify locations with the potential to receive a lower insecticide dosage. To increase overall efÞcacy, these locations may be targeted for additional interventions to provide more uniform pest population suppression.

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A Prospective Study of the Effects of Ultralow Volume (ULV) Aerial Application of Malathion on Epidemic Plasmodium falciparum Malaria

Cited by 17 publications

References 0 publications

Malaria vector research and control in Haiti: a systematic review

Malaria vector research and control in Haiti: a systematic review

Changes in mosquito species and blood meal composition associated with adulticide applications

Spatial Pattern in Aerosol Insecticide Deposition Inside a Flour Mill

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