Susceptibility of Anopheles gambiae complex mosquitoes to microbial larvicides in diverse ecological settings in western Kenya.

Autor: Derua YA; Department of Parasitology and Entomology, Kilimanjaro Christian Medical University College, Tumaini University Makumira, Moshi, Tanzania.; Department of Research Programmes, National Institute for Medical Research, Amani Research Centre, Tanga, Tanzania., Kahindi SC; Department of Zoology, School of Pure and Applied Sciences, Pwani University, Kilifi, Kenya., Mosha FW; Department of Parasitology and Entomology, Kilimanjaro Christian Medical University College, Tumaini University Makumira, Moshi, Tanzania., Kweka EJ; Division of Livestock and Human Diseases Vector Control, Tropical Pesticides Research Institute, Arusha, Tanzania.; Department of Medical Parasitology and Entomology, Catholic University of Health and Allied Sciences, Mwanza, Tanzania., Atieli HE; Department of Public Health, Maseno University, Kisumu, Kenya., Zhou G; Programme in Public Health, College of Health Sciences, University of California Irvine, Irvine, CA, U.S.A., Lee MC; Programme in Public Health, College of Health Sciences, University of California Irvine, Irvine, CA, U.S.A., Githeko AK; Climate and Human Health Research Unit, Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya., Yan G; Programme in Public Health, College of Health Sciences, University of California Irvine, Irvine, CA, U.S.A.
Jazyk: angličtina
Zdroj: Medical and veterinary entomology [Med Vet Entomol] 2019 Jun; Vol. 33 (2), pp. 220-227. Date of Electronic Publication: 2019 Jan 09.
DOI: 10.1111/mve.12353
Abstrakt: The microbial larvicides Bacillus thuringiensis var. israelensis (Bti) and Bacillus sphaericus (Bs) (Bacillales: Bacillaceae) are well known for their efficacy and safety in mosquito control. In order to assess their potential value in future mosquito control strategies in western Kenya, the current study tested the susceptibility of five populations of Anopheles gambiae complex mosquitoes (Diptera: Culicidae), collected from five diverse ecological sites in this area, to Bti and Bs under laboratory conditions. In each population, bioassays were conducted with eight concentrations of larvicide (Bti/Bs) in four replicates and were repeated on three separate days. Larval mortality was recorded at 24 h or 48 h after the application of larvicide and subjected to probit analysis. A total of 2400 An. gambiae complex larvae from each population were tested for their susceptibility to Bti and Bs. The mean (± standard error of the mean, SEM) lethal concentration values of Bti required to achieve 50% and 95% larval mortality (LC 50 and LC 95 ) across the five populations were 0.062  (± 0.005) mg/L and 0.797 (± 0.087) mg/L, respectively. Corresponding mean  (± SEM) values for Bs were 0.058 (± 0.005) mg/L and 0.451 (± 0.053) mg/L, respectively. Statistical analysis indicated that the five populations of An. gambiae complex mosquitoes tested were fully susceptible to Bti and Bs, and there was no significant variation in susceptibility among the tested populations.
(© 2019 The Royal Entomological Society.)
Databáze: MEDLINE
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