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Mathematical assessment of the role of vector insecticide resistance and feeding/resting behavior on malaria transmission dynamics:Optimal control analysis

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Infectious Disease Modelling 2018年第1期3卷 301-321页

作者： Jemal Mohammed-Awel Folashade Agusto Ronald E.Mickens Abba B.Gumel Department of Mathematics Valdosta State UniversityValdostaGA 31698USA Department of Ecology and Evolutionary Biology University of KansasLawrenceKS USA Department of Physics Clark Atlanta UniversityAtlantaGA 30314USA School of Mathematical and Statistical Sciences Arizona State UniversityTempeAZ85287USA

The large-scale use of insecticide-treated bednets(ITNs)and indoor residual spraying(IRS),over the last two decades,has resulted in a dramatic reduction of malaria incidence ***,the effectiveness of these interventions is now being threatened by numerous factors,such as resistance to insecticide in the mosquito vector and their preference to feed and rest outdoors or early in the evening(when humans are not protected by the bednets).This study presents a new deterministic model for assessing the population-level impact of mosquito insecticide resistance on malaria transmission dynamics.A notable feature of the model is that it stratifies the mosquito population in terms of type(wild or resistant to insecticides)and feeding preference(indoor or outdoor).The model is rigorously analysed to gain insight into the existence and asymptotic stability properties of the various disease-free equilibria of the model namely the trivial diseasefree equilibrium,the non-trivial resistant-only boundary disease-free equilibrium and a non-trivial disease-free equlibrium where both the wild and resistant mosquito geneotypes co-exist).Simulations of the model,using data relevant to malaria transmission dynamics in Ethiopia(a malaria-endemic nation),show that the use of optimal ITNs alone,or in combination with optimal IRS,is more effective than the singular implementation of an optimal IRS-only ***,when the effect of the fitness cost of insecticide resistance with respect to fecundity(i.e.,assuming a decrease in the baseline birth rate of new resistant-type adult female mosquitoes)is accounted for,numerical simulations of the model show that the combined optimal ITNs-IRS strategy could lead to the effective control of the disease,and insecticide resistance effectively managed during the first 8 years of the 15-year implementation period of the insecticides-based anti-malaria control measures in the community.

关键词： Malaria insecticide resistance ITNs IRS Equilibria

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Modeling insecticide resistance in Endemic Regions of Kenya

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Applied Mathematics 2016年第6期7卷 542-555页

作者： Josephine Wairimu Marilyn Ronoh School of Mathematics University of Nairobi Nairobi Kenya

In this study, we develop an SIS model for two types of mosquitoes, a traditional one and one that is resistant to IRS and ITNs. The resistant mosquito develops behavioral adaptation to control measures put in place to reduce their biting rate. They also bite early before dusk and later after dark when people are outside the houses and nets. We determine the effect of the two types of mosquitoes on malaria transmission in Kenya. The basic reproduction number R 0 is established as a sharp threshold that determines whether the disease dies out or persists in the population. Precisely, if R 0 ≤ 1, the disease-free equilibrium is globally asymptotically stable and the disease always dies out and if R 0 > 1, there exists a unique endemic equilibrium which is globally stable and the disease persists. The contribution of the two types of mosquitoes to the basic reproduction number and to the level of the endemic equilibrium is analyzed.

关键词： Malaria insecticide resistance ITNs IRS Reproduction Number

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Monitoring of insecticide resistance and Genetic Analysis of Triazophos resistance in Chilo suppressalis (Lepidoptera: Pyralidae)

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Rice Science 2004年第Z1期 297-304页

作者： CAO Ming-zhang, SHEN Jin-Hang, ZHANG Jin-zhen, Lu Mei, LIU Xiao-yu, ZHOU Wei-jun (Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China)

During 2001 and 2002, insecticide resistance in the fourth instar larvae of striped stem borer (Chilo suppressalis), which were collected from Zhejiang, Jiangsu, Anhui and Jiangxi provinces in China, was monitored using topical application method. Low level of resistance to fipronil (6.5-fold) was detected for the first time in RA (Rui'an) population from southeast Zhejiang, but the other six populations tested remained susceptible to this recently introduced insecticide. No resistance to abamectin had been found after examining six populations from Zhejiang, Jiangsu and Anhui provinces. resistance to triazophos was monitored in ten populations from the four Provinces, and very high level resistance(163.1-fold) was found in RA population, moderate (18.2-fold) in WZ (Wenzhou, Zhejiang Province) population, and low (6.7- to 9.7-fold) in populations of CS (Changshu), XS (Xishan) and JT (Jintan) from south Jiangsu, whereas the other five populations were susceptible. All the nine populations monitored were resistant to monosultap with varying degree, i.e. high level (113.7- and 57.6-fold, respectively) of resistance in RA and YF (Yifeng, Jiangxi Province) populations, moderate (11.0- to 29.7-fold) in WZ, CS, JT and TH (Taihu, Anhui Province) populations, low (6.7- and 7.5-fold, respectively) in XY (Xinyang, Jiangsu Province) and XS populations, and the lowest (3.7-fold) in GY (Guanyun, Jiangsu Province) population. Inheritance of resistance in triazophos selected strain Rts was studied through reciprocal cross and backcross experiments. The preliminary results indicated that inheritance of triazophos resistance in Rts strain was incompletely dominant, with degrees of dominance being 0.46 and 0.68 for reciprocal crosses, and that the resistance was controlled by a major gene, though minor modifying gene(s) might be involved.

关键词： Chilo suppressalis insecticide resistance fipronil triazophos monosultap abamectin resistance inheritance

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Comparison of insecticide resistance and Its Enzyme Mechanisms among Aedes aegypti Collected with Three Methods in a Dengue-Endemic City in Southern Mexico

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Advances in Entomology 2022年第3期10卷 252-266页

作者： Walter Eduardo Quezada-Yaguachi Americo D. Rodriguez Francisco Solís-Santoyo Alma Delia López-Solís William C. Black IV Karla Saavedra-Rodriguez Diego Morales-Viteri R. Patricia Penilla-Navarro Centro Regional de Investigación en Salud Pública Instituto Nacional de Salud Pública Tapachula Mexico Arthropod Borne and Infectious Diseases Laboratory Department of Microbiology Immunology and Pathology College of Veterinary Medicine and Biomedical Sciences Colorado State University Fort Collins CO USA Sector “El Dorado” Centro de Referencia Nacional de Vectores Instituto Nacional de Investigación en Salud Pública Quito Ecuador

Background: Despite the physical and chemical effort to control Aedes aegypti, the arboviruses transmission in the south of Mexico remains latent. Trying to improve the methods of entomological surveillance routinely used, whether the estimation of resistance to insecticides used for its control, as well as their enzyme mechanisms, were influenced by the phase in which the mosquitoes were collected through three different collection methods was investigated. Materials and Methods: Mosquito collections from the “5 de Febrero” neighborhood in Tapachula, Mexico were obtained by ovitraps, larvitraps, and a CDC backpack aspirator. insecticide resistance of F1 females was determined by WHO diagnostic doses and resistance ratios (RR50), furthermore, levels of insecticide metabolism enzymes were determined by biochemical assays. Results: Overall, in mosquitoes collected by ovitraps, larvitraps, and CDC backpack aspirator respectively, the low mortalities obtained with the discriminant dose to Malathion (27.57%, 26.97%, and 26.91%), and to Bendiocarb (50.5%, 45.36%, and 54.97%) suggest resistance. However, LC50 for Malathion (0.922, 0.934, and 0.915) and for Bendiocarb (0.112, 0.109, and 0.107);and the low resistance ratios (RR50) for Malathion (3.34, 3.29, and 3.27) and for Bendiocarb (2.15, 2.1, and 2.06) does not suggest resistance. Although a slight numerical variation is observed between the three LC50 values, the overlap observed between their confidence intervals allows us to assume that there were no differences between the three methods. In general, esterases (determined with three substrates), glutathion S-transferases (GST) and cytochromes P450 were statistically higher than those of the susceptible strain;and the three enzyme levels were statistically different among the three collection methods (P Conclusion: Although using a CDC backpack aspirator demonstrated being the best collection method det

关键词： CDC Backpack Aspirator insecticide resistance Larvitraps Mosquitoes Ovitraps

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Evidence of insecticide resistance selection in wildmosquitoes due to agricultural pesticide use

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Infectious Diseases of Poverty 2019年第4期8卷 41-48页

作者： Chouaibou Seidou Mouhamadou Sarah Souline de Souza Behi Kouadio Fodjo Marius Gonse Zoh Nestor Kesse Bli Benjamin Guibehi Koudou Centre Suisse de Recherches Scientifiques en Cote d'Ivoire(CSRS) AbidjanCote dlvoire Department of Entom ology and Plant Pathology North Carolina State UniversityRaleighNCUSA Bayer West-Central Africa SA AbidjanCote dlvoire Universite Nangui Abrogoua AbidjanCote dlvoire Laboratoire d'Ecologie Alpine(LECA) CNRSGrenobleFrance Universite Grenoble-Alpes GrenobleFrance Environmental and Systems Biology(BEeSy) Universite Grenoble-AlpesGrenobleFrance

Background:The wetlands used for some agricultural activities constitute productive breeding sites for many mosquito ***,the agricultural use of insecticide targeting other pests may select for insecticide resistance in malaria *** purpose of this study is to clarify some knowledge gaps on the role of agrochemicals in the development of insecticide resistance in malaria vectors is of utmost importance for vector ***:Using the CDC bottle test and the log-probit analysis,we investigated for the first time the resistance levels ofAnopheles coluzzii mosquitoes to neonicotinoids,insecticides used exclusively for crop protection in C?te d’*** study was conducted in two agricultural regions(Tiassale and Gagnoa)and one non-agricultural region(Vitre)between June and August 2017 using clothianidin,acetamiprid and ***:Mosquito populations from Tiassale and Gagnoa(agricultural settings)were determined to be resistant to acetamiprid with mortality rates beinginsecticides can cause insecticide resistance in malaria vector *** resistance driven by agrochemical usage should be considered when vector control strategies are developed.

关键词： Vector control insecticide resistance resistance selection Agriculture Anopheles coluzzii

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Feeding behavior and hormoligosis associated with imidacloprid resistance in Asian citrus psyllid,Diaphorina citri

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Insect Science 2024年第4期31卷 1211-1221页

作者： Xue Dong Chen Justin George Lauren M.Diepenbrock Hunter Gossett Guoping Liu Jawwad A.Qureshi Lukasz L.Stelinski Entomology and Nematology Department University of FloridaCitrus Research and Education CenterLake AlfredFloridaUSA Southern Insect Management Research Unit USDA-ARSStonevilleMississippiUSA Entomology and Nematology Department University of FloridaSouthwest Florida Research and Education CenterImmokaleeFloridaUSA

Imidacloprid is a neonicotinoid insecticide used for managing the Asian citrus psyllid,Diaphorina citri Kuwayama,which serves as vector of phytopathogens causing citrus ***,development of resistance to neonicotinoids among populations of *** has coincided with occasional control failures in the *** objectives of this research were to(1)survey current levels of imidacloprid resistance in Florida citrus;(2)compare feeding behavior between imidacloprid-resistant and susceptible *** using electrical penetration graph recordings,and(3)investigate the possible amplification of insecticide hormoligosis associated with *** surveys confirmed that the susceptibility of *** populations to imidacloprid has decreased in commercial Florida citrus groves compared with a laboratory-susceptible *** 12 generations of selection,resistance to imidacloprid increased by 438 fold compared with the susceptible ***-susceptible *** feeding on citrus exhibited significantly more bouts associated with intercellular pathway(C),phloem penetration(D),phloem salivation(E1),and nonprobing(Np)activities than imidacloprid-resistant ***,there were no differences observed in the frequency or duration of phloem ingestion or xylem feeding between susceptible and resistant *** was no statistical difference in fecundity between resistant and susceptible ***,the fecundity of imidacloprid-susceptible female *** treated with a sublethal concentration of imidacloprid(LC_(25))increased significantly compared with controls,while such hormoligosis was less pronounced among imidacloprid-resistant *** results suggest that imidacloprid-resistant psyllids may cease feeding sooner than susceptible counterparts following sublethal exposure to this insecticide,indicative of a behavioral resistance mechanism.

关键词： artificial selection electrical penetration graph feeding behavior hormoligosis insecticide resistance sublethal exposure

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中国北方棉蚜对杀虫剂的抗药性(英文)

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Insect Science 1994年第3期1卷 242-250页

作者：孙耘芹冯国蕾袁家珪龚坤元中国科学院动物研究所北京100080 中国科学院动物研究所

棉蚜(Aphis gossypu Glover)是我国北方棉区的主要害虫。自1953年开始使用有机磷杀虫剂对硫磷和1059等防治棉蚜以来,田间喷雾浓度和使用次数逐年增大,棉蚜产生的抗性。80年代使用高效拟除虫菊酯类杀虫剂溴氰菊酯和氰戊菊酯等,三年后棉... 详细信息

棉蚜(Aphis gossypu Glover)是我国北方棉区的主要害虫。自1953年开始使用有机磷杀虫剂对硫磷和1059等防治棉蚜以来,田间喷雾浓度和使用次数逐年增大,棉蚜产生的抗性。80年代使用高效拟除虫菊酯类杀虫剂溴氰菊酯和氰戊菊酯等,三年后棉蚜抗性增长了171倍,有些地区达3230倍。此文报道棉蚜的抗性机制的研究结果,证实了棉蚜抗性与杀虫剂穿透能力降低、多功能氧化酶、α-乙酸萘酯酶和α-乙酸萘酯羧酸酶的活力增加、乙酰胆碱酯酶对杀虫剂敏感性的降低有关。在这基础上进行增效剂SV对多种有机磷和拟除虫菊酯杀虫剂的增效试验,得出SV对防治抗性棉蚜有明显的增效作用,能延缓抗性的发展。并研究了杀虫剂抗性的防治策略及综合治理措施,为防治棉蚜抗性和延缓抗性发展取得了较好的效果。

关键词： Aphis gossypii Glover organophosphorus pyrethroid insecticide resistance

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棉铃虫抗药性基因频率的测定(英文)

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Insect Science 1998年第4期5卷 355-361页

作者：乔传令闫艳春中国科学院动物研究所!北京100080

本文介绍了用单个棉铃虫测定杀虫药剂抗性基因频率的灵敏方法。该技术是基于比较三个相等量单个棉铃虫的乙酰胆碱酯酶的活性，每个棉铃虫要用微量滴定板同时做3个试验（也可用Enppen－dorf管）（No．1－3）：1）不加抑制剂（No．1）；2... 详细信息

本文介绍了用单个棉铃虫测定杀虫药剂抗性基因频率的灵敏方法。该技术是基于比较三个相等量单个棉铃虫的乙酰胆碱酯酶的活性，每个棉铃虫要用微量滴定板同时做3个试验（也可用Enppen－dorf管）（No．1－3）：1）不加抑制剂（No．1）；2）不加酶源（No．2）；3）加一定浓度的残杀威以抑制编码敏感AceS等位基因的乙酰胆碱酯酶，但不能抑制编码抗性AceR等位基因的乙酰胆碱酯酶。如果No．1和No．3的强度一样强，说明残杀威对乙酰胆碱酯酶的活性没有影响，那么基因型应是纯合抗性（AceRR，No3＝No．1）。No．2和地．3的强度一样弱时，说明残杀威完全抑制了乙酰碱酯酶的活性，那么基因型应是纯合敏感（AceSS，No．3＝No．2）。No．3的强度介于No．1（强）和No．2（弱）之间显示出残杀威部分地抑制了乙酰胆碱酯酶的活性；基因型是杂合型（AceSR，No．2＜No.3＜No．1）。作者用该方法测定了1995，1996两年从河北省邯郸和固安县棉田采集的棉铃虫，在邯郸棉铃虫抗药性高发地区，其抗性基因频率AceRR分别是68．3％和65．3％；但在棉铃虫抗药性低发区的固安县其抗性基因频率分别是23．9％和29．4％。

关键词： Helicoverpa armigera insecticide resistance Ace gene genotype frequency

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Cloning and Overexpression of CYP6F1,a Cytochrome P450 Gene,from Deltamethrin-resistant Culex pipiens pallens

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Acta Biochimica et Biophysica Sinica 2005年第5期37卷 317-326页

作者： Mao-Qing GONG Yan GU Xiao-Bang HU Yan SUN Lei MA Xiu-Lan LI Li-Xin SUN Jing SUN Jin QIAN Chang-Liang ZHU Department of Pathogenic Biology, Nanjing Medical University: Key Laboratory of Modern Pathogenic Biology of Jiangsu Province, Nanjing 210029, China Department of Pathogenic Biology Nanjing Medical University Key Laboratory of Modern Pathogenic Biology of Jiangsu ProvinceNanjing 210029 China

CYP6F1(GenBank/EMBL accession ***662654),a novel gene with a complete encodingsequence in the cytochrome P450 family 6,was cloned and sequenced from deltamethrin-resistant 4thinstar larvae of Culex pipiens *** cDNA sequence of CYP6F1 has an open reading frame of 1527bp,which encodes a putative protein of 508 amino acid *** deduced amino acid sequence ofCYP6F1 indicated that the encoded P450 has conserved domains of a putative membrane-anchoring signal,putative reductase-binding sites,a typical heme-binding site,an ETLR motif and substrate recognition ***-quantitative RT-PCR analysis indicated that the CYP6F1 gene was expressed to a greater extent in thedeltamethrin-resistant strain than in the susceptible strain of *** *** expression levels ofthe CYP6F1 gene in the deltamethrin-resistant 1 st,2nd,3rd,4th instar larvae and adult female mosquitoesdiffered,with highest expression levels in the 4th instar *** addition,the CYP6F1 gene was stablyexpressed in mosquito C6/36 cells,and the expected 61.2 kDa band was identified by Western *** transfected with CYP6F1 had an increased resistance to deltamethrin as compared with control *** results indicate that CYP6F1 is expressed at higher levels in the deltamethrin-resistant strain,and mayconfer some insecticide resistance in *** pallens.

关键词： Culex pipiens pallens insecticide resistance cytochrome P450 RT-PCR

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Does cypermethrin affect enzyme activity, respiration rate and walking behavior of the maize weevil （Sitophilus zeamais）？

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Insect Science 2013年第3期20卷 358-366页

作者： Ronnie Von Santos Veloso Eliseu Jose G. Pereira Raul Narciso C. Guedes Maria Goreti A. Oliveira Departamento de Entomologia Departamento de Bioquimica e Biologia Molecular Universidade Federal de Vicosa Brazil

insecticides cause a range of sub-lethal effects on targeted insects, which are frequently detrimental to them. However, targeted insects are able to cope with insecti- cides within sub-lethal ranges, which vary with their susceptibility. Here we assessed the response of three strains of the maize weevil Sitophilus zeamais Motschulsky （Coleoptera.＂ Curculionidae） to sub-lethal exposure to the pyrethoid insecticide cypermethrin. We ex- pected enzyme induction associated with cypermethrin resistance since it would aid the resistant insects in surviving such exposure. Lower respiration rate and lower activity were also expected in insecticide-resistant insects since these traits are also likely to favor survivorship under insecticide exposure. Curiously though, cypermethrin did not affect ac- tivity of digestive and energy metabolism enzymes, and even reduced the activity of some enzymes （particularly for cellulase and cysteine-proteinase activity in this case）. There was strain variation in response, which may be （partially） related to insecticide resistance in some strains. Sub-lethal exposure to cypermethrin depressed proteolytic and mainly cellulolytic activity in the exposed insects, which is likely to impair their fitness. However, such exposure did not affect respiration rate and walking behavior of the insects （except for the susceptible strain where walking activity was reduced）. Walking activity varies with strain and may minimize insecticide exposure, which should be a concern, particularly if associated with （physiological） insecticide resistance.

关键词： insecticides insecticide resistance pyrethroids stored grain insect sub-lethal effects

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