Decreased proportions of indoor feeding and endophily in Anopheles gambiae s.l. populations following the indoor residual spraying and insecticide-treated net interventions in Benin (West Africa)

Particle and Fibre Toxicology

Martin Akogbeto²  Michel Sezonlin¹  Aikpon Rock²  Virgile Gnanguenon²  Olivier Oussou²  Ossé Razack²  Roseric Azondekon²  Anges Yadouleton²  Ghelus Gbedjissi²  Gil Germain Padonou² 

[1] Faculte des Sciences et Techniques de l’Universite d’Abomey Calavi, Abomey Calavi, Benin;Centre de Recherche Entomologique de Cotonou (CREC), Cotonou, Benin

关键词: Benin;    Anopheles gambiae;    Behavior;    Deltamethrin;    Bendiocarb;    LLITNs;    IRS;   

Others  :  1228839
DOI  :  10.1186/1756-3305-5-262

 received in 2012-07-13, accepted in 2012-10-20,  发布年份 2012

【 摘 要 】

Background

In many parts of Africa as in Benin, the main strategies of vector control are based on the scaling-up of Long Lasting Insecticide Treated Nets (LLITNs) and indoor residual spraying (IRS). The need to understand the biological implications of IRS in large scale and full coverage of LLITNs is paramount. It is in this context that the present study was conducted. It aims to evaluate the effect of a large scale IRS using a non-pyrethroid insecticide and full coverage of deltamethrin treated nets on the behavior of An. gambiae s.l. in the intervention areas compared to untreated areas used as controls.

Methods

Mosquitoes were collected using human landing catches, pyrethrum spray catches and window exit traps to assess reduction of entry rate, endophily rate, endophagy rate and overall mortality rate in natural populations of An. gambiae s.l. before IRS and LLITNs intervention (2007) and after in 2008 and 2010.

Results

In the IRS arm, endophily rate was 67.13% before intervention and 4.5% after intervention, whereas in the control arm it was stable at 51.67% (P > 0 .05). In the LLITN arm endophily rates also decreased after intervention. After the IRS, no gravid mosquitoes were collected from all treated localities, but LLITN performance was not that spectacular. The proportion of mosquitoes biting indoors in the IRS arm decreased from 67.09% before intervention to 42.85% after intervention, compared to a low but significant decrease (71.31% to 57. 46%) in the LLITN arm.

The use of vector control tools and behavior of the host would be the main factors that modify the behavior of taking a human blood meal observed on An. gambiae s.l. inside human dwellings.

Conclusion

The impact on the behavior of An. gambiae s.l. observed with the bendiocarb used in IRS was highly effective compared with the free distribution of LLITNs in terms of mortality and the decrease of proportions of indoor feeding. Despite this efficacy, there is a need for complementary tools and research of alternative strategy oriented on effective health education, and the use of powerful tools such as IRS, LLITNs, larviciding and repellents.

【 授权许可】

   
2012 Padonou et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

【 参考文献 】

• [1]Okiro EA, Hay SI, Gikandi PW, Sharif SK, Noor AM, Peshu N, Marsh K, Snow RW: The decline in paediatric malaria admissions on the coast of Kenya. Malaria J 2007, 15:151.
• [2]Ceesay SJ, Casals-Pascual C, Erskine J, Anya SE, Duah NO, Fulford AJC, Sesay SSS, Abubakar I, Dunyo S, Sey O, Palmer A, Fofana M, Corrah T, Bojang KA, Whittle HC, Greenwood BM, Conway DJ: Changes in malaria indices between 1999 and 2007 in The Gambia: a retrospective analysis. Lancet 2008, 372:1545-1554.
• [3]Barutwanayo M, Coosemans M, Delacollette C, Bisore S, Mpitabakana P, Seruzingo D: La lutte contre les vecteurs du paludisme dans le cadre d’un projet de developpement rural au Burundi. Ann Soc Belg Med Trop 1991, 71:113-125.
• [4]Reimer LJ, Tripet F, Slotman M, Spielman A, Fondjo E, Lanzaro GC: An unusual distribution of the kdr gene among populations of Anopheles gambiae on the island of Bioko, Equatorial Guinea. Insect Mol Biol 2005, 14:683-688.
• [5]Protopopoff N, Verhaeghen K, Van Bortel W, Roelants P, Marcotty T, Baza D, D’Alessandro U, Coosemans M: A high increase in kdr in Anopheles gambiae isassociated with an intensive vector control intervention in Burundi highlands. Trop Med Int Health 2008, 13:1479-1487.
• [6]Zaim M, Guillet P: Alternative insecticides: an urgent need. Trends Parasitol 2002, 18:161-163.
• [7]Mpofu SM, Kanyimo KH, Masendu H: Potential use of bendiocarb (Ficam VC) for malaria control in an area of Zimbabwe. J Am Mosq Control Assoc 1991, 7(4):536-42.
• [8]Asinas CY, Hugo CT, Boase CJ, Evans RG: Evaluation of selective spraying of bendiocarb (Ficam VC) for the control of Anopheles flavirostris in the Philippines. J Am Mosq Control Assoc 1994, 10:496-500.
• [9]Asidi AN, N’Guessan R, Koffi AA, Curtis CF, Hougard JM, Chandre F, Corbel V, Darriet F, Zaim M, Rowland MW: Experimental hut evaluation of bednets treated with an organophosphate (chlorpyriphos-methyl) or a pyrethroid (lambdacyhalothrin) alone and in combination against insecticide-resistant Anopheles gambiae and Culex quinquefasciatus mosquitoes. Malar J 2005, 4:25. BioMed Central Full Text
• [10]Akogbeto MC, Padonou GG, Gbenou D, Irish S, Yadouleton A: Bendiocarb, a potential alternative against pyrethroid resistant Anopheles gambiae in Benin, West Africa. Malaria J 2010, 9:204. BioMed Central Full Text
• [11]L M: Le projet Garki: recherches sur l’epidemiologie du paludisme et la lutte antipaludique dans la savane soudanienne de l’Afrique occidentale. OMS: Geneve; 1980.
• [12]Payne D, Grab B, Fontaine RE, Hempel JH: Impact of control measures on malaria transmission and general mortality. Bull World Health Organ 1976, 54:369-77.
• [13]Mutuku FM, King CH, Mungai P, Mbogo C, Mwangangi J, Muchiri EM, Walker ED, Kitron U: Impact of insecticide-treated bed nets on malaria transmission indices on the south coast of Kenya. Malaria J 2011, 10:356. BioMed Central Full Text
• [14]Sungvornyothrin S, Chareonviriyaphap T, Prabaripai A, Trirakhupt V, Ratanatham S, Bangs MJ: Effects of nutritional and physiological status on behavioral avoidance of Anopheles minimus (Diptera: Culicidae) to DDT, deltamethrin and lambdacyhalothrin. J Vector Ecol 2001, 26:202-215.
• [15]Feachem RGA, Phillips AA, Hwang J, Cotter C, Wielgosz B, Greenwood BM, Sabot O, Rodriguez MH, Abeyasinghe RR, Ghebreyesus TA, Snow RW: Shrinking the malaria map: progress and prospects. Lancet 2010, 376:1566-1578.
• [16]Padonou GG, Sezonlin M, Gbedjissi GL, Ayi I, Azondekon R, Djenontin A, Bio-Bangana S, Oussou O, Yadouleton A, Boakye D, Akogbeto M: Biology of Anopheles gambiae and insecticide resistance: Entomological study for a large scale of indoor residual spraying in South East Benin. J Parasitol Vector Biol 2011, 3(4):59-68.
• [17]Akogbeto M, Padonou GG, Bankole HS, Gazard DK, Gbedjissi GL: Dramatic decrease in malaria transmission after large-scale indoor residual spraying with Bendiocarb in Benin, an area of high resistance of Anopheles gambiae to Pyrethroids. Am J Trop Med Hyg 2011, 85(4):586-593.
• [18]Padonou GG, Sezonlin M, Osse R, Aizoun N, Oke-Agbo F, Oussou O, Gbedjissi G, Akogbeto M: Impact of three years of large scale Indoor Residual Spraying (IRS) and Insecticide Treated Nets (ITNs) interventions on insecticide resistance in Anopheles gambiae s.l. in Benin. Parasit Vectors 2012, 5:72. BioMed Central Full Text
• [19]Gillies MT, De Meillon B: The Anophelinae of Africa south of the Sahara. Johannesburg: Publication of the South African Institute for Medical Research; 1968:54.
• [20]OMS: Entomologie du paludisme et contrôle des vecteurs. Genève: Organisation mondiale de la Santé; 2002. [WHO/CDS/CPE/SMT/2002.18 Rev.1]
• [21]Howard SC, Omumbo J, Nevill C, Some ES, Donnelly CA, Snow RW: Evidence for a mass community effect of insecticide-treated bednets on the incidence of malaria on the Kenyan coast. Trans R Soc Trop Med Hyg 2000, 94(4):357-60.
• [22]Curtis CF, Maxwell CA, Finch RJ, Njunwa KJ: A comparison of use of a pyrethroid either for house spraying or for bednet treatment against malaria vectors. Trop Med Int Health 1998, 3:619-631.
• [23]Mouchet J, Gariou J: Exophilie et exophagie d’Anopheles gambiae Giles 1902, dans le sud Cameroun. Bull Soc Pathol Exot 1957, 3:446-461.
• [24]Faye O, Konate L, Mouchet J, Fontenille D, Sy N, Hebrard G, Herve JP: Indoor resting by outdoor biting females of Anopheles gambiae complex (Diptera: Culicidae) in the sahel of northern Senegal. J Med Entomol 1997, 34:285-289.
• [25]N’Guessan R, Corbel V, Akogbeto M, Rowland M: Reduced efficacy of insecticide-treated nets and indoor residual spraying for malaria control in pyrethroid resistance area, Benin. Emerg Infect Dis 2007, 13(2):199-206.
• [26]Djenontin A, Chabi J, Baldet T, Irish S, Pennetier C, Hougard JM, Corbel V, Akogbeto M, Chandre F: Managing insecticide resistance in malaria vectors by combining carbamate-treated plastic wall sheeting and pyrethroid-treated bed nets. Malaria J 2009, 8:233. BioMed Central Full Text
• [27]Djogbenou L, Dabire R, Diabate A, Kengne P, Akogbeto M, Hougard JM, Chandre F: Identification and geographic distribution of the ace 1R mutation in the malaria vector Anopheles gambiae in south-western Burkina Faso, West Africa. Am J Trop Med Hyg 2008, 78(2):298-302.
• [28]Akogbeto M, et Yakoubou S: Resistance des vecteurs du paludisme vis-à-vis des pyréthrinoides utilises pour l’imprégnation des moustiquaires au Benin, Afrique de l’Ouest. Bull Soc Pathol Exot 1999, 2:123-130.
• [29]Noor AM, Moloney G, Borle M, Fegan GW, Shewchuk T, Snow Robert W: The Use of Mosquito Nets and the Prevalence of Plasmodium falciparum Infection in Rural South Central Somalia. PLoS ONE 2008, 3(5):2081.
• [30]Premji Z, Lubega P, Hamisi Y, Mchopa E, Minjas J, Checkley W, Shiff C: Changes in malaria associated morbidity in children using insecticide treated mosquito nets in the Bagamoyo district of coastal Tanzania. Trop Med Parasitol 1995, 46(3):147-53.
• [31]Habicht JP, Victora CG, Vaughan JP: Evaluation designs for adequacy, plausibility and probability of public health programme performance and impact. Int J Epidemiol 1999, 28:10-18.
• [32]Charlwood JD, Smith T, Kihonda J, Heiz B, Billingsley PF, Takken W: Density independent feeding success of malaria vectors (Diptera: Culicidae) in Tanzania. Bull Entomol Res 1995, 85:29-35.
• [33]Reddy MR, Overgaard HJ, Abaga S, Reddy VP, Caccone A, Kiszewski AE, Slotman MA: Outdoor host seeking behaviour of Anopheles gambiae mosquitoes following initiation of malaria vector control on Bioko Island. Equatorial Guinea. Malaria J 2011, 10:184. BioMed Central Full Text
• [34]Russell TL, Govella NJ, Azizi S, Drakeley CJ, Kachur SP, Killeen GF: Increased proportions of outdoor feeding among residual malaria vector populations following increased use of insecticide-treated nets in rural Tanzania. Malaria J 2011, 10:80. BioMed Central Full Text
• [35]Mbogo CNM, Baya NM, Ofulla AVO, Githure JI, Snow RW: The impact of permethrin-impregnated bednets on malaria vectors on the Kenyan coast. Med Vet Entomol 1996, 10:251-259.
• [36]Najera JA, Zaim M: Lutte contre les vecteurs du paludisme. OMS Geneve: Criteres et procedures de prise de decision pour une utilisation raisonnee des insecticides; 2004.
• [37]Howard AFV, N’Guessan R, Koenraadt CJM, Asidi A, Farenhorst M, Akogbeto M, Thomas MB, Knols BGJ, Takken W: The entomopathogenic fungus Beauveria bassiana reduces instantaneous blood feeding in wild multi-insecticide-resistant mosquitoes in Benin, West Africa. Parasit Vectors 2010, 3:87. BioMed Central Full Text
• [38]Munhenga G, Brooke BD, Chirwa TF, Hunt RH, Coetzee M, Govender D, Koekemoer LL: Evaluating the potential of the sterile insect technique for malaria control: relative fitness and mating compatibility between laboratory colonized and a wild population of Anopheles arabiensis from the Kruger National Park, South Africa. Parasit Vectors 2011, 4:208-11. BioMed Central Full Text