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Perugini E, Pichler V, Guelbeogo WM, Micocci M, Poggi C, Manzi S, Ranson H, Della Torre A, Mancini E, Pombi M. Longitudinal survey of insecticide resistance in a village of central region of Burkina Faso reveals co-occurrence of 1014F, 1014S and 402L mutations in Anopheles coluzzii and Anopheles arabiensis. Malar J 2024; 23:250. [PMID: 39164725 PMCID: PMC11334353 DOI: 10.1186/s12936-024-05069-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 08/07/2024] [Indexed: 08/22/2024] Open
Abstract
BACKGROUND Pyrethroid resistance is one of the major threats for effectiveness of insecticide-treated bed nets (ITNs) in malaria vector control. Genotyping of mutations in the voltage gated sodium channel (VGSC) gene is widely used to easily assess the evolution and spread of pyrethroid target-site resistance among malaria vectors. L1014F and L1014S substitutions are the most common and best characterized VGSC mutations in major African malaria vector species of the Anopheles gambiae complex. Recently, an additional substitution involved in pyrethroid resistance, i.e. V402L, has been detected in Anopheles coluzzii from West Africa lacking any other resistance alleles at locus 1014. The evolution of target-site resistance mutations L1014F/S and V402L was monitored in An. coluzzii and Anopheles arabiensis specimens from a Burkina Faso village over a 10-year range after the massive ITN scale-up started in 2010. METHODS Anopheles coluzzii (N = 300) and An. arabiensis (N = 362) specimens collected both indoors and outdoors by different methods (pyrethrum spray catch, sticky resting box and human landing collections) in 2011, 2015 and 2020 at Goden village were genotyped by TaqMan assays and sequencing for the three target site resistance mutations; allele frequencies were statistically investigated over the years. RESULTS A divergent trend in resistant allele frequencies was observed in the two species: 1014F decreased in An. coluzzii (from 0.76 to 0.52) but increased in An. arabiensis (from 0.18 to 0.70); 1014S occurred only in An. arabiensis and slightly decreased over time (from 0.33 to 0.23); 402L increased in An. coluzzii (from 0.15 to 0.48) and was found for the first time in one An. arabiensis specimen. In 2020 the co-occurrence of different resistance alleles reached 43% in An. coluzzii (alleles 410L and 1014F) and 32% in An. arabiensis (alleles 1014F and 1014S). CONCLUSIONS Overall, an increasing level of target-site resistance was observed among the populations with only 1% of the two malaria vector species being wild type at both loci, 1014 and 402, in 2020. This, together with the co-occurrence of different mutations in the same specimens, calls for future investigations on the possible synergism between resistance alleles and their phenotype to implement local tailored intervention strategies.
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Affiliation(s)
- Eleonora Perugini
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Verena Pichler
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Wamdaogo M Guelbeogo
- Centre National de Recherche et Formation Sur le Paludisme, Ouagadougou, Burkina Faso
| | - Martina Micocci
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Cristiana Poggi
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Sara Manzi
- Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy
| | - Hilary Ranson
- Liverpool School of Tropical Medicine, Department of Vector Biology, Liverpool, UK
| | - Alessandra Della Torre
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy
| | - Emiliano Mancini
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, Rome, Italy
| | - Marco Pombi
- Department of Public Health and Infectious Diseases, Sapienza University of Rome, Rome, Italy.
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McCarthy ML, Wallace DI. Optimal control of a tick population with a view to control of Rocky Mountain Spotted Fever. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:18916-18938. [PMID: 38052583 DOI: 10.3934/mbe.2023837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
In some regions of the Americas, domestic dogs are the host for the tick vector Rhipicephalus sanguineus, and spread the tick-borne pathogen Rickettsia rickettsii, which causes Rocky Mountain Spotted Fever (RMSF) in humans. Interventions are carried out against the vector via dog collars and acaricidal wall treatments. This paper investigates the optimal control of acaricidal wall treatments, using a prior model for populations and disease transmission developed for this particular vector, host, and pathogen. It is modified with a death term during questing stages reflecting the cost of control and level of coverage. In the presence of the control, the percentage of dogs and ticks infected with Ri. rickettsii decreases in a short period and remains suppressed for a longer period, including after treatment is discontinued. Risk of RMSF infection declines by 90% during this time. In the absence of re-application, infected tick and dog populations rebound, indicating the eventual need for repeated treatment.
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Affiliation(s)
- Maeve L McCarthy
- Department of Mathematics & Statistics, Murray State University, 203A Industry & Technology, Murray KY 42071, USA
| | - Dorothy I Wallace
- Department of Mathematics, Dartmouth College, 27 N. Main Street, 6188 Kemeny Hall, Hanover, NH 03755-3551, USA
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Poda SB, Buatois B, Lapeyre B, Dormont L, Diabaté A, Gnankiné O, Dabiré RK, Roux O. No evidence for long-range male sex pheromones in two malaria mosquitoes. Nat Ecol Evol 2022; 6:1676-1686. [DOI: 10.1038/s41559-022-01869-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 08/01/2022] [Indexed: 11/09/2022]
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Silalahi CN, Tu WC, Chang NT, Singham GV, Ahmad I, Neoh KB. Insecticide Resistance Profiles and Synergism of Field Aedes aegypti from Indonesia. PLoS Negl Trop Dis 2022; 16:e0010501. [PMID: 35666774 PMCID: PMC9203003 DOI: 10.1371/journal.pntd.0010501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/16/2022] [Accepted: 05/16/2022] [Indexed: 12/05/2022] Open
Abstract
Information on the insecticide resistance profiles of Aedes aegypti in Indonesia is fragmentary because of the lack of wide-area insecticide resistance surveillance. We collected Ae. aegypti from 32 districts and regencies in 27 Indonesian provinces and used WHO bioassays to evaluate their resistance to deltamethrin, permethrin, bendiocarb, and pirimiphos-methyl. To determine the possible resistance mechanisms of Ae. aegypti, synergism tests were conducted using piperonyl butoxide (PBO) and S,S,S-tributylphosphorotrithioates (DEF). The Ae. aegypti from all locations exhibited various levels of resistance to pyrethroids. Their resistance ratio (RR50) to permethrin and deltamethrin ranged from 4.08× to 127× and from 4.37× to 72.20×, respectively. In contrast with the findings of other studies, most strains from the highly urbanized cities on the island of Java (i.e., Banten, Jakarta, Bandung, Semarang, Yogyakarta, and Surabaya) exhibited low to moderate resistance to pyrethroids. By contrast, the strains collected from the less populated Kalimantan region exhibited very high resistance to pyrethroids. The possible reasons are discussed herein. Low levels of resistance to bendiocarb (RR50, 1.24–6.46×) and pirimiphos-methyl (RR50, 1.01–2.70×) were observed in all tested strains, regardless of locality. PBO and DEF synergists significantly increased the susceptibility of Ae. aegypti to permethrin and deltamethrin and reduced their resistance ratio to less than 16×. The synergism tests suggested the major involvement of cytochrome P450 monooxygenases and esterases in conferring pyrethroid resistance. On the basis of our results, we proposed a 6-month rotation of insecticides (deltamethrin + synergists ➝ bendiocarb ➝ permethrin + synergists ➝ pirimiphos-methyl) and the use of an insecticide mixture containing pyrethroid and pyrimiphos-methyl to control Ae. aegypti populations and overcome the challenge of widespread Ae. aegypti resistance to pyrethroid in Indonesia. Insecticide resistance is a major impediment to the successful management of vector-transmitted diseases because it increases the vector’s chances of surviving under insecticide treatment. In Indonesia, the implementation of insecticide resistance management at the national level is particularly challenging due to the vast area and regional disparities in terms of population, health, and socioeconomic status. Previous studies on determining insecticide resistance of Aedes mosquito only focused on several cities in some provinces of Indonesia, making resistance monitoring results difficult to interpret and arguably reflect the generality in Indonesia. To complicate the matter, data released by the Ministry of Agriculture of Indonesia in 2022 showed that approximately 82% of insecticides registered to control Ae. aegypti in Indonesia are pyrethroid-based products. Principally, we found that the synergists PBO and DEF significantly reduce the resistance of field Ae. aegypti from Indonesia toward permethrin and deltamethrin. Bendiocarb and pirimiphos-methyl remain highly toxic to the field strains of Ae. aegypti. We suggest the feasible choice of insecticide group for Ae. aegypti vector management based on the currently registered insecticide inventory. The finding also underscores the urgent need to approve other non-pyrethroid-based insecticides as alternative tools for reducing the risk of resistance development during an outbreak.
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Affiliation(s)
| | - Wu-Chun Tu
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
| | - Niann-Tai Chang
- Department of Plant Medicine, National Pingtung University of Science and Technology, Pingtung, Taiwan
| | - G. Veera Singham
- Centre for Chemical Biology, Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
| | - Intan Ahmad
- School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung, West Java, Indonesia
- * E-mail: (IA); (KBN)
| | - Kok-Boon Neoh
- Department of Entomology, National Chung Hsing University, Taichung, Taiwan
- * E-mail: (IA); (KBN)
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Banjara MR, Das ML, Gurung CK, Singh VK, Joshi AB, Matlashewski G, Kroeger A, Olliaro P. Integrating Case Detection of Visceral Leishmaniasis and Other Febrile Illness with Vector Control in the Post-Elimination Phase in Nepal. Am J Trop Med Hyg 2019; 100:108-114. [PMID: 30426921 PMCID: PMC6335889 DOI: 10.4269/ajtmh.18-0307] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Nepal has completed the attack phase of visceral leishmaniasis (VL) elimination and now needs active case detection (ACD) and vector control methods that are suitable to the consolidation and maintenance phases. We evaluated different ACD approaches and vector control methods in Saptari district. We assessed 1) mobile teams deployed in villages with VL cases in 2015 to conduct combined camps for fever and skin lesions to detect VL/PKDL (post–kala-azar dermal leishmaniasis) and other infections; 2) an incentive approach by trained female community health volunteers (FCHVs) in villages with no VL cases in 2015. Both were followed by house-to-house visits. For vector control, four villages were randomly allocated to insecticide impregnation of bednets, insecticide wall painting, indoor residual spraying (IRS), and control. Sandfly density (by CDC light traps, The John W. Hock Company, USA) and mortality (World Health Organization cone bioassay) were assessed in randomly selected households. One VL, three tuberculosis, one leprosy, and one malaria cases were identified among 395 febrile cases attending the camps. Post-camp house-to-house screening involving 7,211 households identified 679 chronic fever and 461 skin lesion cases but no additional VL/PKDL. No VL/PKDL case was found by FCHVs. The point prevalence of chronic fever in camp and FCHV villages was 242 and 2 per 10,000 populations, respectively. Indoor residual spraying and bednet impregnation were effective for 1 month versus 12 months with insecticidal wall paint. Twelve-month sandfly mortality was 23%, 26%, and 80%, respectively, on IRS, bednet impregnation, and insecticide wall painting. In Nepal, fever camps and insecticidal wall paint prove to be alternative, sustainable strategies in the VL post-elimination program.
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Affiliation(s)
- Megha Raj Banjara
- Central Department of Microbiology, Tribhuvan University, Kathmandu, Nepal
| | | | | | - Vivek Kumar Singh
- Public Health and Infectious Disease Research Center, Kathmandu, Nepal
| | | | - Greg Matlashewski
- Department of Microbiology and Immunology, McGill University, Montreal, Canada
| | - Axel Kroeger
- Centre for Medicine and Society/Anthropology, Freiburg University, Freiburg, Germany.,Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization (WHO), Geneva, Switzerland
| | - Piero Olliaro
- Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization (WHO), Geneva, Switzerland
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Namountougou M, Soma DD, Kientega M, Balboné M, Kaboré DPA, Drabo SF, Coulibaly AY, Fournet F, Baldet T, Diabaté A, Dabiré RK, Gnankiné O. Insecticide resistance mechanisms in Anopheles gambiae complex populations from Burkina Faso, West Africa. Acta Trop 2019; 197:105054. [PMID: 31175862 DOI: 10.1016/j.actatropica.2019.105054] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 10/26/2022]
Abstract
Vector control constitutes a fundamental approach in reducing vector density and the efficient option to break malaria transmission in Africa. Malaria vectors developed resistance to almost all classes of insecticides recommended by WHO for vector control in most places of African countries and may compromise the vector control strategies. This study updated the resistance status of Anopheles gambiae complex populations to insecticides recommended for vector control in the western part of Burkina Faso. Insecticide susceptibility bioassays were performed on seven natural populations of An. gambiae complex from western Burkina Faso in the 2016 rainy season using the WHO protocol. Biochemical assays were carried out according to the WHO protocol on the same populations to estimate detoxifying enzymes activities including non-specific esterases (NSEs), oxidases (cytochrome P450) and Glutathione-S-Transferases (GSTs). Polymerase Chain Reactions (PCRs) were performed for the identification of the An. gambiae complex species as well as the detection of kdr-west and ace-1 mutations. Susceptibility bioassays showed that An. gambiae complex was multi-resistant to pyrethroids, DDT and carbamates in almost all areas. The mortality rates ranged from 10 to 38%, 2.67 to 59.57% and 64.38 to 98.02% for Deltamethrin, DDT and Bendiocarb respectively. A full susceptibility (100%) to an organophosphate, the Chlorpyrifos-methyl, was observed at the different sites. Three (3) species of the An. gambiae complex were identified: An. gambiae s.s, An. coluzzii and An. arabiensis. The frequencies of the kdr-w mutation were highly widespread (0.66 to 0.98) among the three species of the complex. The ace-1 mutation was detected at low frequencies (0 to 0.12) in An. gambiae s.s and An. coluzzii. A high level of GSTs and NSEs were observed within the different populations of the An. gambiae complex. Several mechanisms of insecticide resistance were found simultaneously in the same populations of An. gambiae complex conferring high multi-resistance to DDT, Carbamate and Pyrethroids. The full susceptibility of An. gambiae complex to organophosphates is a useful data for the national malaria control program in selecting the most appropriate products to both maintain the effectiveness of vector control strategies and best manage insecticide resistance as well as developing new alternative strategies for the control of major malaria vectors in Burkina Faso.
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Poda SB, Soma DD, Hien A, Namountougou M, Gnankiné O, Diabaté A, Fournet F, Baldet T, Mas-Coma S, Mosqueira B, Dabiré RK. Targeted application of an organophosphate-based paint applied on windows and doors against Anopheles coluzzii resistant to pyrethroids under real life conditions in Vallée du Kou, Burkina Faso (West Africa). Malar J 2018; 17:136. [PMID: 29609597 PMCID: PMC5879594 DOI: 10.1186/s12936-018-2273-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 03/14/2018] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND A novel strategy applying an organophosphate-based insecticide paint on doors and windows in combination with long-lasting insecticide-treated nets (LLINs) was tested for the control of pyrethroid-resistant malaria vectors in a village setting in Vallée du Kou, a rice-growing area west of Burkina Faso. METHODS Insecticide Paint Inesfly 5A IGR™, comprised of two organophosphates and an insect growth regulator, was applied to doors and windows and tested in combination with pyrethroid-treated LLINs. The killing effect was monitored for 5 months by early morning collections of anophelines and other culicids. The residual efficacy was evaluated monthly by WHO bioassays using Anopheles gambiae 'Kisumu' and local populations of Anopheles coluzzii resistant to pyrethroids. The spatial mortality efficacy (SME) at distances of 1 m was also assessed against pyrethroid-susceptible and -resistant malaria vectors. The frequency of L1014F kdr and Ace-1 R G119S mutations was, respectively, reported throughout the study. The Insecticide Paint Inesfly 5A IGR had been tested in past studies yielding a long-term mortality rate of 80% over 12 months against An. coluzzii, the local pyrethroid-resistant malaria vector. The purpose of the present study is to test if treating smaller, targeted surfaces (e.g. doors and windows) was also efficient in killing malaria vectors. RESULTS Treating windows and doors alone yielded a killing efficacy of 100% for 1 month against An. coluzzii resistant to pyrethroids, but efficacy reduced quickly afterwards. Likewise, WHO cone bioassays yielded mortalities of 80-100% for 2 months but declined to 90 and 40% 2 and 3 months after treatment, respectively. Mosquitoes exposed to insecticide paint-treated surfaces at distances of 1 m, yielded mortality rates of about 90-80% against local pyrethroids-resistant An. coluzzii during the first 2 months, but decreased to 30% afterwards. Anopheles coluzzii was reported to be exclusively the local malaria vector and resistant to pyrethroids with high L1014 kdr frequency. CONCLUSION The combination of insecticide paint on doors and windows with LLINs yielded high mortality rates in the short term against wild pyrethroid-resistant malaria vector populations. A high SME was observed against laboratory strains of pyrethroid-resistant malaria vectors placed for 30 min at 1 m from the treated/control walls. The application of the insecticide paint on doors and windows led to high but short-lasting mortality rates. The strategy may be an option in a context where low cost, rapid responses need to be implemented in areas where malaria vectors are resistant to pyrethroids.
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Affiliation(s)
- Serge B Poda
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso
- Université Ouaga 1 Pr Joseph Ki-Zerbo, Ouagadougou, Burkina Faso
| | - Dieudonné D Soma
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso
- Université Nazi Boni, Bobo-Dioulasso, Burkina Faso
| | - Aristide Hien
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso
| | - Moussa Namountougou
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso
- Université Nazi Boni, Bobo-Dioulasso, Burkina Faso
| | - Olivier Gnankiné
- Université Ouaga 1 Pr Joseph Ki-Zerbo, Ouagadougou, Burkina Faso
| | - Abdoulaye Diabaté
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso
| | - Florence Fournet
- Institut de Recherche pour le Développement (IRD), BP 64501, 34394, Montpellier Cedex 5, France
| | - Thierry Baldet
- Cirad, UMR15 CMAEE, INRA, UMR1309 CMAEE, Montpellier, France
| | - Santiago Mas-Coma
- Departamento de Parasitología, Facultad de Farmacia, Universitat de Valencia, Av. Vicent Andrés Estellés s/n, Burjassot, 46100, Valencia, Spain
| | - Beatriz Mosqueira
- Departamento de Parasitología, Facultad de Farmacia, Universitat de Valencia, Av. Vicent Andrés Estellés s/n, Burjassot, 46100, Valencia, Spain
| | - Roch K Dabiré
- Institut de Recherche en Sciences de la Santé (IRSS)/Centre Muraz, 01 BP 545, Bobo-Dioulasso 01, Burkina Faso.
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Soma DD, Maïga H, Mamai W, Bimbile-Somda NS, Venter N, Ali AB, Yamada H, Diabaté A, Fournet F, Ouédraogo GA, Lees RS, Dabiré RK, Gilles JRL. Does mosquito mass-rearing produce an inferior mosquito? Malar J 2017; 16:357. [PMID: 28882146 PMCID: PMC5590130 DOI: 10.1186/s12936-017-2012-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 09/04/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The success of the sterile insect technique depends, among other things, on continuous releases of sexually competitive sterile males within the target area. Several factors (including high rearing density and physical manipulation, such as larvae and pupae separation) can influence the quality of males produced in mass-rearing facilities. The different steps in mass production in the laboratory may modify the behaviour of mosquitoes, directly or through loss of natural characters as a result of adaptation to lab rearing, and lead to the competitiveness of sterile male being reduced. In the present study, the objective was to evaluate the effect of mass-rearing conditions on sterile male sexual competitiveness in semi-field cages compared to routine small scale laboratory rearing methods. METHODS Anopheles arabiensis immature stages were reared both on a large scale using a rack and tray system developed by the FAO/IAEA (MRS), and on a small scale using standard laboratory rearing trays (SRS). Mosquito life history traits such as pupation rate, emergence rate, adult size as well as the effect of irradiation on adult longevity were evaluated. Moreover, 5-6 day old mosquitoes were released into field cages and left for two nights to mate and the mating competitiveness between sterile mass-reared males and fertile males reared on a small scale when competing for small scale reared virgin females was investigated. Resulting fertility in a treatment ratio of 1:1:1 (100 irradiated males: 100 non-irradiated males: 100 virgin females) was compared to control cages with 0:100:100 (non-irradiated control) and 100:0:100 (irradiated control). RESULTS No significant differences in life history parameters were observed between rearing methods. The competitiveness index of mass reared males (0.58) was similar to males reared on a small scale (0.59). A residual fertility rate of 20% was observed in the irradiated control (100:0:100), measured as the percentage of eggs collected from the cages which developed to adulthood. No significant difference was observed (t = 0.2896, df = 4, P = 0.7865) between the rearing treatments (MRS and SRS) in the fertility rate, a measure of mating competitiveness. CONCLUSIONS The results showed that the FAO/IAEA mass-rearing process did not affect mosquito life history parameters or the mating competitiveness of males.
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Affiliation(s)
- Dieudonné D Soma
- Institut de Recherche en Sciences de la Santé/Centre Muraz, BP 545, Bobo-Dioulasso, Burkina Faso. .,Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria. .,Université Nazi Boni, Bobo-Dioulasso, Burkina Faso.
| | - Hamidou Maïga
- Institut de Recherche en Sciences de la Santé/Centre Muraz, BP 545, Bobo-Dioulasso, Burkina Faso.,Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Wadaka Mamai
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.,Institut de Recherche Agricole pour le Développement (IRAD), Yaoundé, Cameroon
| | - Nanwintoun S Bimbile-Somda
- Institut de Recherche en Sciences de la Santé/Centre Muraz, BP 545, Bobo-Dioulasso, Burkina Faso.,Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Nelius Venter
- Vector Control Reference Laboratory, Centre for Opportunistic, Tropical & Hospital Infections, National Institute for Communicable Diseases / Wits Research Institute for Malaria, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Adel B Ali
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Hanano Yamada
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria
| | - Abdoulaye Diabaté
- Institut de Recherche en Sciences de la Santé/Centre Muraz, BP 545, Bobo-Dioulasso, Burkina Faso
| | - Florence Fournet
- Institut de Recherche pour le Développement (IRD), MIVEGEC, BP 64501, 34394, Montpellier Cedex 5, France
| | | | - Rosemary S Lees
- Liverpool Insect Testing Establishment (LITE), Vector Biology Department, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - Roch K Dabiré
- Institut de Recherche en Sciences de la Santé/Centre Muraz, BP 545, Bobo-Dioulasso, Burkina Faso
| | - Jeremie R L Gilles
- Insect Pest Control Laboratory, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Vienna, Austria.
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Vantaux A, Lefèvre T, Cohuet A, Dabiré KR, Roche B, Roux O. Larval nutritional stress affects vector life history traits and human malaria transmission. Sci Rep 2016; 6:36778. [PMID: 27827429 PMCID: PMC5101500 DOI: 10.1038/srep36778] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 10/17/2016] [Indexed: 11/15/2022] Open
Abstract
Exposure to stress during an insect’s larval development can have carry-over effects on adult life history traits and susceptibility to pathogens. We investigated the effects of larval nutritional stress for the first time using field mosquito vectors and malaria parasites. In contrast to previous studies, we show that larval nutritional stress may affect human to mosquito transmission antagonistically: nutritionally deprived larvae showed lower parasite prevalence for only one gametocyte carrier; they also had lower fecundity. However, they had greater survival rates that were even higher when infected. When combining these opposing effects into epidemiological models, we show that larval nutritional stress induced a decrease in malaria transmission at low mosquito densities and an increase in transmission at high mosquito densities, whereas transmission by mosquitoes from well-fed larvae was stable. Our work underscores the importance of including environmental stressors towards understanding host–parasite dynamics to improve disease transmission models and control.
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Affiliation(s)
- Amélie Vantaux
- MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), UMR IRD 224-CNRS 5290-UM, Montpellier, France.,Institut de Recherche en Sciences de la Santé (IRSS), 01BP171 Bobo-Dioulasso, Burkina Faso
| | - Thierry Lefèvre
- MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), UMR IRD 224-CNRS 5290-UM, Montpellier, France.,Institut de Recherche en Sciences de la Santé (IRSS), 01BP171 Bobo-Dioulasso, Burkina Faso
| | - Anna Cohuet
- MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), UMR IRD 224-CNRS 5290-UM, Montpellier, France.,Institut de Recherche en Sciences de la Santé (IRSS), 01BP171 Bobo-Dioulasso, Burkina Faso
| | - Kounbobr Roch Dabiré
- Institut de Recherche en Sciences de la Santé (IRSS), 01BP171 Bobo-Dioulasso, Burkina Faso.,Centre Muraz, Bobo-Dioulasso, Burkina Faso
| | - Benjamin Roche
- UMMISCO (Unité de Modélisation Mathématique et Informatique des Systèmes Complexes), UMI IRD/UPMC 209, Bondy, France
| | - Olivier Roux
- MIVEGEC (Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle), UMR IRD 224-CNRS 5290-UM, Montpellier, France.,Institut de Recherche en Sciences de la Santé (IRSS), 01BP171 Bobo-Dioulasso, Burkina Faso
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Schiøler KL, Alifrangis M, Kitron U, Konradsen F. Insecticidal Paints: A Realistic Approach to Vector Control? PLoS Negl Trop Dis 2016; 10:e0004518. [PMID: 27101473 PMCID: PMC4839634 DOI: 10.1371/journal.pntd.0004518] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Karin L. Schiøler
- Global Health Section, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
| | - Michael Alifrangis
- Centre for Medical Parasitology, Department of Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
- Department of Infectious Diseases, Copenhagen University Hospital, Copenhagen, Denmark
| | - Uriel Kitron
- Department of Environmental Sciences, Emory University, Atlanta, Georgia, United States of America
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Flemming Konradsen
- Global Health Section, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
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