1
|
Park D, Bowles J, Norrid K, Dobson FS, Abebe A, Narayanan HV, Prakash M, Blagburn B, Starkey L, Zohdy S. Effect of age on wingbeat frequency of Aedes aegypti and potential application for age estimation of mosquitoes. MEDICAL AND VETERINARY ENTOMOLOGY 2023; 37:491-498. [PMID: 36872598 DOI: 10.1111/mve.12647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
To combat mosquito-borne diseases, a variety of vector control tools have been implemented. Estimating age structure in populations of vector species is important for understanding transmission potential. Age-grading techniques have been used as critical methods for evaluating the efficacy of vector control tools. However, methods like mark-release-recapture and ovarian dissection are laborious and require a high level of training. For decades, scientists have discussed the wide array of acoustic signatures of different mosquito species. These distinguishable wingbeat signatures with spatiotemporal classification allow mosquitoes of the same species to locate one another for mating. In recent years, the use of sensitive acoustic devices like mobile phones have proved effective. Wingbeat signatures can be used to identify mosquito species without the challenge of intensive field collections and morphological and molecular identifications. In this study, laboratory Aedes aegypti (L.) female and male wingbeats were recorded using mobile phones to determine whether sex and age differences with chronological time, and across different physiological stages, can be detected. Our results indicate significantly different wingbeat signatures between male and female Ae. aegypti, and a change of wingbeat frequencies with age and reproduction stage in females.
Collapse
Affiliation(s)
- Doyeon Park
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, Alabama, USA
| | - Joy Bowles
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Kate Norrid
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, Alabama, USA
| | - F Stephen Dobson
- Department of Biological Sciences, Auburn University, Auburn, Alabama, USA
| | - Ash Abebe
- Department of Mathematics and Statistics, Auburn University, Auburn, Alabama, USA
| | - Haripriya Vaidehi Narayanan
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, California, USA
| | - Manu Prakash
- Department of Bioengineering, Stanford University, Stanford, California, USA
| | - Byron Blagburn
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Lindsay Starkey
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Sarah Zohdy
- College of Forestry, Wildlife and Environment, Auburn University, Auburn, Alabama, USA
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| |
Collapse
|
2
|
Krupa E, Gréhal AL, Esnault J, Bender C, Mathieu B. Laboratory Evaluation of Flight Capacities of Aedes japonicus (Diptera: Culicidae) Using a Flight Mill Device. JOURNAL OF INSECT SCIENCE (ONLINE) 2021; 21:6449198. [PMID: 34865033 PMCID: PMC8643834 DOI: 10.1093/jisesa/ieab093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Dispersion expands the distribution of invasive species and as such, it is a key factor of the colonization process. Aedes japonicus japonicus (Theobald, 1901) is an invasive species of mosquito and a vector of various viruses. It was detected in the northeast of France in 2014. The population of this species can expand its distribution by several kilometers per year. However, though flight capacities play an active part in the dispersion of Ae. japonicus, they remain unknown for this species. In this study, we investigated the flight capacities of Ae. japonicus in a laboratory setting using the flight mill technique. We evaluated the influence of age on flight. We recorded videos of individual flights with a camera mounted on Raspberry Pi. We extracted data on distance, duration, and speed of flight using the Toxtrac and Boris software. Our analysis showed a median flight distance of 438 m with a maximum of 11,466 m. Strong flyers, which represented 10% of the females tested, flew more than 6,115 m during 4 h and 28 min at a speed of 1.7 km per h. As suspected, Ae. japonicus is a stronger flyer than the other invasive species Aedes albopictus (Skuse, 1894) (Diptera: Culicidae). To our knowledge, this is the first flight mill study conducted on Ae. japonicus and therefore the first evaluation of its flight capacity. In the future, the flight propensity of Ae. japonicus determined in this study can be included as a parameter to model the colonization process of this invasive vector species.
Collapse
Affiliation(s)
- Eva Krupa
- Institut de Parasitologie et Pathologie Tropicale, UR7292 Dynamique des interactions hôte pathogène, Fédération de Médecine Translationnelle, Université de Strasbourg, F-67000, Strasbourg, France
| | - Alexa-Lou Gréhal
- Institut de Parasitologie et Pathologie Tropicale, UR7292 Dynamique des interactions hôte pathogène, Fédération de Médecine Translationnelle, Université de Strasbourg, F-67000, Strasbourg, France
| | - Jérémy Esnault
- Syndicat de Lutte contre les Moustiques du Bas-Rhin (SLM67), F-67630, Lauterbourg, France
| | - Christelle Bender
- Syndicat de Lutte contre les Moustiques du Bas-Rhin (SLM67), F-67630, Lauterbourg, France
| | - Bruno Mathieu
- Institut de Parasitologie et Pathologie Tropicale, UR7292 Dynamique des interactions hôte pathogène, Fédération de Médecine Translationnelle, Université de Strasbourg, F-67000, Strasbourg, France
| |
Collapse
|
3
|
Oliveira FM, Wanderley-Teixeira V, Cruz GS, Silva CT, Dutra KA, Costa HN, Braga VA, Silva EJ, Guedes CA, Alves TJ, Teixeira ÁA. Histological, histochemical and energy disorders caused by R-limonene on Aedes aegypti L. larvae (Diptera: Culicidae). Acta Trop 2021; 221:105987. [PMID: 34058162 DOI: 10.1016/j.actatropica.2021.105987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/14/2021] [Accepted: 05/24/2021] [Indexed: 10/21/2022]
Abstract
The study evaluated the effects of R-limonene, in sublethal concentration, on the histology, histochemistry, biochemistry, and carbohydrates and proteins levels in the third instar Aedes aegypti larvae. The R-limonene (LC50 of 27 ppm) and control groups were analyzed 12 and 24 h after the beginning of treatments. The midgut of the control larvae was composed of cylindrical and elongated cells with a spherical and central nucleus and regenerative cells with a pyramidal shape. After 12 h of treatment, columnar cells, protuberances, and cytoplasmic vacuolization were found. However, 24 h after treatment, complete disorganization of the epithelium was observed. There was a positive reaction in all treatments for the presence of glycogen. However, the midgut of larvae treated with R-limonene showed higher levels. For the total protein, positive marking occurred in all groups evaluated, with higher levels in treatments and the lowest in control 12 h. The levels of total protein and glycogen increased in the treated larvae compared to the 12 h control. Besides, a reduction in total sugar levels was observed in the treated larvae compared to controls 12 and 24 h, being more evident in the last one. Therefore, these results demonstrate that R-Limonene caused pathological changes in the epithelium of the A. aegypti midgut at histophysiological and biochemical levels.
Collapse
|
4
|
Shin J, Jung J. Comparative population genetics of the invasive mosquito Aedes albopictus and the native mosquito Aedes flavopictus in the Korean peninsula. Parasit Vectors 2021; 14:377. [PMID: 34315478 PMCID: PMC8314453 DOI: 10.1186/s13071-021-04873-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 07/07/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Aedes mosquitoes are important invasive species contributing to the spread of chikungunya, dengue fever, yellow fever, zika virus, and other dangerous vector-borne diseases. Aedes albopictus is native to southeast Asia, with rapid expansion due to human activity, showing a wide distribution in the Korean peninsula. Aedes flavopictus is considered to be native to East Asia, with a broad distribution in the region, including the Korean peninsula. A better understanding of the genetic diversity of these species is critical for establishing strategies for disease prevention and vector control. METHODS We obtained DNA from 148 specimens of Ae. albopictus and 166 specimens of Ae. flavopictus in Korea, and amplified two mitochondrial genes (COI and ND5) to compare the genetic diversity and structure of the two species. RESULTS We obtained a 658-bp sequence of COI and a 423-bp sequence of ND5 from both mosquito species. We found low diversity and a nonsignificant population genetic structure in Ae. albopictus, and high diversity and a nonsignificant structure in Ae. flavopictus for these two mitochondrial genes. Aedes albopictus had fewer haplotypes with respect to the number of individuals, and a slight mismatch distribution was confirmed. By contrast, Ae. flavopictus had a large number of haplotypes compared with the number of individuals, and a large unimodal-type mismatch distribution was confirmed. Although the genetic structure of both species was nonsignificant, Ae. flavopictus exhibited higher genetic diversity than Ae. albopictus. CONCLUSIONS Aedes albopictus appears to be an introduced species, whereas Ae. flavopictus is endemic to the Korean peninsula, and the difference in genetic diversity between the two species is related to their adaptability and introduction history. Further studies on the genetic structure and diversity of these mosquitos will provide useful data for vector control.
Collapse
Affiliation(s)
- Jiyeong Shin
- The Division of EcoCreative, Ewha Womans University, Seoul, 03760 South Korea
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul, 03760 South Korea
- Department of Science Education, Ewha Womans University, Seoul, 03760 South Korea
| |
Collapse
|
5
|
Bega AG, Moskaev AV, Gordeev MI. Ecology and Distribution of the Invasive Mosquito Species Aedes albopictus (Skuse, 1895) in the South of the European Part of Russia. RUSSIAN JOURNAL OF BIOLOGICAL INVASIONS 2021. [DOI: 10.1134/s2075111721020041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
ECOLOGY AND DISTRIBUTION OF INVASIVE MOSQUITO SPECIES<i> AEDES ALBOPICTUS</i> (SKUSE, 1895) IN THE SOUTH OF EUROPEAN PART OF RUSSIA. RUSSIAN JOURNAL OF BIOLOGICAL INVASIONS 2021. [DOI: 10.35885/1996-1499-2021-14-1-27-37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim of the study was to show ecological preferences and to establish the actual range of the invasive mosquito species Aedes albopictus . The moving of Ae. albopictus from the Black Sea coast of the Caucasus into the interior of the European part of Russia for the period 2017-2019 is shown. The northern border of the distribution of this species in 2019 passed through the cities: Timashevsk, Kropotkin, and Armavir. The limiting environmental parameters for the preimaginal stages of Ae. albopictus development are: the content of oxygen dissolved in the water and the water acidity. We believe that the air humidity and the floristic composition of the territory are the main factors determining the movement of the Aedes albopictus mosquitoes deep into the Russian Plain. The data obtained can be used for epidemiological surveillance and planning of preventive measures.
Collapse
|
7
|
Osório HC, Rocha J, Roquette R, Guerreiro NM, Zé-Zé L, Amaro F, Silva M, Alves MJ. Seasonal Dynamics and Spatial Distribution of Aedes albopictus (Diptera: Culicidae) in a Temperate Region in Europe, Southern Portugal. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7083. [PMID: 32992664 PMCID: PMC7579007 DOI: 10.3390/ijerph17197083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/21/2020] [Accepted: 09/24/2020] [Indexed: 11/16/2022]
Abstract
Aedes albopictus is an invasive mosquito that has colonized several European countries as well as Portugal, where it was detected for the first time in 2017. To increase the knowledge of Ae. albopictus population dynamics, a survey was carried out in the municipality of Loulé, Algarve, a Southern temperate region of Portugal, throughout 2019, with Biogents Sentinel traps (BGS traps) and ovitraps. More than 19,000 eggs and 400 adults were identified from May 9 (week 19) and December 16 (week 50). A positive correlation between the number of females captured in the BGS traps and the number of eggs collected in ovitraps was found. The start of activity of A. albopictus in May corresponded to an average minimum temperature above 13.0 °C and an average maximum temperature of 26.2 °C. The abundance peak of this A. albopictus population was identified from September to November. The positive effect of temperature on the seasonal activity of the adult population observed highlight the importance of climate change in affecting the occurrence, abundance, and distribution patterns of this species. The continuously monitoring activities currently ongoing point to an established population of A. albopictus in Loulé, Algarve, in a dispersion process to other regions of Portugal and raises concern for future outbreaks of mosquito-borne diseases associated with this invasive mosquito species.
Collapse
Affiliation(s)
- Hugo C. Osório
- Centre for Vectors and Infectious Diseases Research/National Institute of Health Doutor Ricardo Jorge, Avenida da Liberdade 5, 2965-575 Águas de Moura, Portugal; (L.Z.-Z.); (F.A.); (M.S.); (M.J.A.)
- Instituto de Saúde Ambiental, Faculty of Medicine, University of Lisbon, Av. Prof. Egas Moniz, Ed. Egas Moniz, Piso0, Ala C, 1649-028 Lisboa, Portugal
| | - Jorge Rocha
- Institute of Geography and Spatial Planning, University of Lisbon, Rua Branca Edmée Marques, 1600-276 Lisboa, Portugal;
| | - Rita Roquette
- Department of Epidemiology/National Institute of Health Doutor Ricardo Jorge, Avenida Padre Cruz, 1649-019 Lisboa, Portugal;
- NOVA Information Management School, Campus de Campolide, 1070-312 Lisboa, Portugal
| | - Nélia M. Guerreiro
- Department of Public Health and Planning, Algarve Regional Health Administration, IP, Rua Brites de Almeida, n° 6, 3rd Dt° 8000-234 Faro, Portugal;
| | - Líbia Zé-Zé
- Centre for Vectors and Infectious Diseases Research/National Institute of Health Doutor Ricardo Jorge, Avenida da Liberdade 5, 2965-575 Águas de Moura, Portugal; (L.Z.-Z.); (F.A.); (M.S.); (M.J.A.)
- BioISI—Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisbon, 1749-016 Lisbon, Portugal
| | - Fátima Amaro
- Centre for Vectors and Infectious Diseases Research/National Institute of Health Doutor Ricardo Jorge, Avenida da Liberdade 5, 2965-575 Águas de Moura, Portugal; (L.Z.-Z.); (F.A.); (M.S.); (M.J.A.)
- Instituto de Saúde Ambiental, Faculty of Medicine, University of Lisbon, Av. Prof. Egas Moniz, Ed. Egas Moniz, Piso0, Ala C, 1649-028 Lisboa, Portugal
| | - Manuel Silva
- Centre for Vectors and Infectious Diseases Research/National Institute of Health Doutor Ricardo Jorge, Avenida da Liberdade 5, 2965-575 Águas de Moura, Portugal; (L.Z.-Z.); (F.A.); (M.S.); (M.J.A.)
| | - Maria João Alves
- Centre for Vectors and Infectious Diseases Research/National Institute of Health Doutor Ricardo Jorge, Avenida da Liberdade 5, 2965-575 Águas de Moura, Portugal; (L.Z.-Z.); (F.A.); (M.S.); (M.J.A.)
- Instituto de Saúde Ambiental, Faculty of Medicine, University of Lisbon, Av. Prof. Egas Moniz, Ed. Egas Moniz, Piso0, Ala C, 1649-028 Lisboa, Portugal
| |
Collapse
|
8
|
Miazgowicz KL, Shocket MS, Ryan SJ, Villena OC, Hall RJ, Owen J, Adanlawo T, Balaji K, Johnson LR, Mordecai EA, Murdock CC. Age influences the thermal suitability of Plasmodium falciparum transmission in the Asian malaria vector Anopheles stephensi. Proc Biol Sci 2020; 287:20201093. [PMID: 32693720 PMCID: PMC7423674 DOI: 10.1098/rspb.2020.1093] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Models predicting disease transmission are vital tools for long-term planning of malaria reduction efforts, particularly for mitigating impacts of climate change. We compared temperature-dependent malaria transmission models when mosquito life-history traits were estimated from a truncated portion of the lifespan (a common practice) versus traits measured across the full lifespan. We conducted an experiment on adult female Anopheles stephensi, the Asian urban malaria mosquito, to generate daily per capita values for mortality, egg production and biting rate at six constant temperatures. Both temperature and age significantly affected trait values. Further, we found quantitative and qualitative differences between temperature-trait relationships estimated from truncated data versus observed lifetime values. Incorporating these temperature-trait relationships into an expression governing the thermal suitability of transmission, relative R0(T), resulted in minor differences in the breadth of suitable temperatures for Plasmodium falciparum transmission between the two models constructed from only An. stephensi trait data. However, we found a substantial increase in thermal niche breadth compared with a previously published model consisting of trait data from multiple Anopheles mosquito species. Overall, this work highlights the importance of considering how mosquito trait values vary with mosquito age and mosquito species when generating temperature-based suitability predictions of transmission.
Collapse
Affiliation(s)
- K L Miazgowicz
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA
| | - M S Shocket
- Biology Department, Stanford University, Stanford, CA, USA.,Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
| | - S J Ryan
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, USA.,Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA.,School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - O C Villena
- Computational Modeling and Data Analytics, Department of Statistics, Virginia Tech, Blacksburg, VA, USA
| | - R J Hall
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA.,Odum School of Ecology, University of Georgia, Athens, GA, USA
| | - J Owen
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - T Adanlawo
- Odum School of Ecology, University of Georgia, Athens, GA, USA
| | - K Balaji
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - L R Johnson
- Computational Modeling and Data Analytics, Department of Statistics, Virginia Tech, Blacksburg, VA, USA
| | - E A Mordecai
- Biology Department, Stanford University, Stanford, CA, USA
| | - C C Murdock
- Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.,Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, USA.,Center of Ecology of Infectious Diseases, University of Georgia, Athens, GA, USA.,Odum School of Ecology, University of Georgia, Athens, GA, USA.,Center for Vaccines and Immunology, University of Georgia, Athens, GA, USA.,River Basin Center, University of Georgia, Athens, GA, USA.,Department of Entomology, Cornell University, Ithaca, NY, USA
| |
Collapse
|
9
|
Vavassori L, Saddler A, Müller P. Active dispersal of Aedes albopictus: a mark-release-recapture study using self-marking units. Parasit Vectors 2019; 12:583. [PMID: 31831040 PMCID: PMC6909613 DOI: 10.1186/s13071-019-3837-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 12/03/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Understanding the dispersal dynamics of invasive mosquito species is fundamental to improve vector surveillance and to target control efforts. Aedes albopictus has been deemed a poor flyer as its range of active dispersal is generally assumed to be limited to a few hundred metres, while laboratory studies suggest this mosquito could actually fly several kilometres. The discrepancy may be due to differences in the local environment or to the methodological approach. In Switzerland, Ae. albopictus has been present since 2003 and has since then expanded its range. While passive dispersal is a key driver, it remains unclear how far this mosquito spreads through active flight and what the age structure and size of the local population are, all important parameters for vector surveillance and control. METHOD We investigated the active dispersal, daily survival rate and population size of Ae. albopictus in mark-release-recapture studies in Coldrerio and Lugano, two areas of intensive control in Switzerland. To mark mosquitoes emerging from breeding sites, we used self-marking units with fluorescent pigment that have minimal impact on mosquito survival and behaviour. We recaptured the adult mosquitoes with BG-Sentinel traps within a radius of 1 km from the marking units over 22 consecutive days. RESULTS We found that 77.5% of the recaptured Ae. albopictus individuals flew further than 250 m, the limit that is usually deemed sufficient for vector containment. The average age of females and males was 8.6 days and 7.8 days in Coldrerio and Lugano, respectively, while the estimated mosquito population densities were 134 mosquitoes/ha in Coldrerio and 767 mosquitoes/ha in Lugano. CONCLUSIONS Self-marking units are an effective tool to mark wild mosquitoes. Using this approach, we found that mosquitoes survive long enough to potentially transmit arboviral disease in our study area and that host-seeking Ae. albopictus females may travel further than previously assumed for European mosquito populations. This finding has direct implications for vector control as emergency treatments around positive cases, as well as surveillance and control around detections of new infestations, might need to be extended beyond the usual recommended range of just a few hundred metres.
Collapse
Affiliation(s)
- Laura Vavassori
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland. .,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland.
| | - Adam Saddler
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland.,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland.,Ifakara Health Institute, Environmental Health and Ecological Sciences, P.O. Box 74, Bagamoyo, Tanzania
| | - Pie Müller
- Swiss Tropical and Public Health Institute, Socinstrasse 57, P.O. Box, 4002, Basel, Switzerland.,University of Basel, Petersplatz 1, P.O. Box, 4001, Basel, Switzerland
| |
Collapse
|
10
|
Guo JW, Li P, Zhang J, Liu XD, Zhai BP, Hu G. Cnaphalocrocis medinalis Moths Decide to Migrate when Suffering Nutrient Shortage on the First Day after Emergence. INSECTS 2019; 10:insects10100364. [PMID: 31635147 PMCID: PMC6835577 DOI: 10.3390/insects10100364] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/15/2019] [Accepted: 10/16/2019] [Indexed: 11/23/2022]
Abstract
Migration is a costly strategy in terms of reproduction output. Competition for limited internal resources leads to physiological management of migration-reproduction trade-offs in energy allocation. Migratory insects must choose to determine to allocate energy into reproduction or migration when confronted insufficient energy supply. Although nutrient shortage is known to stimulate insect migration to escape deteriorating habitat, little is known about when and how migratory insects make decisions when confronted by a nutritional shortage. Here Cnaphalocrocis medinalis (Lepidoptera: Pyralidae), a migratory rice pest in eastern Asia, was used to study the effects of starvation on reproductive traits, behavioral traits and energy allocation. The result showed that one or two days’ starvation before preoviposition did not significantly reduce the fertility (total egg per female laid) and flight capability (flight duration and distance) of both sexes C. medinalis. The preoviposition period was extended significantly only if moths were starved starting on the first day after emergence. Also, take-off percentage of moths starved since their first day increased significantly, and continued to increase even if supplemental nutrients were supplied as honey solution in later days. Moths starved on the first day appeared to allocate or transfer triglycerides into the thorax to maintain the migration process: the quantity of thoracic triglycerides did not differ with age, but abdominal triglycerides decreased with age if starvation continued. These results indicate that the first day post-emergence is a critical period for C. medinalis to decide to migrate or not in response to lack of food. This furthers our understanding of the population dynamics of migratory insects under natural conditions.
Collapse
Affiliation(s)
- Jia-Wen Guo
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Ping Li
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Jie Zhang
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Xiang-Dong Liu
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Bao-Ping Zhai
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Gao Hu
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| |
Collapse
|
11
|
Maoz D, Ward T, Samuel M, Müller P, Runge-Ranzinger S, Toledo J, Boyce R, Velayudhan R, Horstick O. Community effectiveness of pyriproxyfen as a dengue vector control method: A systematic review. PLoS Negl Trop Dis 2017; 11:e0005651. [PMID: 28715426 PMCID: PMC5531696 DOI: 10.1371/journal.pntd.0005651] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 07/27/2017] [Accepted: 05/19/2017] [Indexed: 01/08/2023] Open
Abstract
Background Vector control is the only widely utilised method for primary prevention and control of dengue. The use of pyriproxyfen may be promising, and autodissemination approach may reach hard to reach breeding places. It offers a unique mode of action (juvenile hormone mimic) and as an additional tool for the management of insecticide resistance among Aedes vectors. However, evidence of efficacy and community effectiveness (CE) remains limited. Objective The aim of this systematic review is to compile and analyse the existing literature for evidence on the CE of pyriproxyfen as a vector control method for reducing Ae. aegypti and Ae. albopictus populations and thereby human dengue transmission. Methods Systematic search of PubMed, Embase, Lilacs, Cochrane library, WHOLIS, Web of Science, Google Scholar as well as reference lists of all identified studies. Removal of duplicates, screening of abstracts and assessment for eligibility of the remaining studies followed. Relevant data were extracted, and a quality assessment conducted. Results were classified into four main categories of how pyriproxyfen was applied: - 1) container treatment, 2) fumigation, 3) auto-dissemination or 4) combination treatments,–and analysed with a view to their public health implication. Results Out of 745 studies 17 studies were identified that fulfilled all eligibility criteria. The results show that pyriproxyfen can be effective in reducing the numbers of Aedes spp. immatures with different methods of application when targeting their main breeding sites. However, the combination of pyriproxyfen with a second product increases efficacy and/or persistence of the intervention and may also slow down the development of insecticide resistance. Open questions concern concentration and frequency of application in the various treatments. Area-wide ultra-low volume treatment with pyriproxyfen currently lacks evidence and cannot be recommended. Community participation and acceptance has not consistently been successful and needs to be further assessed. While all studies measured entomological endpoints, only two studies measured the reduction in human dengue cases, with inconclusive results. Conclusions Although pyriproxyfen is highly effective in controlling the immature stages of dengue transmitting mosquitoes, and–to a smaller degree–adult mosquitoes, there is weak evidence for a reduction of human dengue cases. More well designed larger studies with appropriate standardised outcome measures are needed before pyriproxyfen is incorporated in routine vector control programmes. Additionally, resistance to pyriproxyfen has been reported and needs investigation. There is evidence that pyriproxyfen may effectively reduce the density of immature mosquito stages when applied to identified breeding sites. Various formulations are commercially available, and easy to use without a health threat to the user. However, questions remain regarding its use as a single agent in a community setting. Considering its mode of action, it would not be the product of choice for use in an acute outbreak setting. However, for a sustainable community approach, especially slow-release pyriproxyfen formulations seem promising, because they are the longest lasting choice. The analysis suggests, that combination with a second vector control chemical, preferably an adulticide tackling different stages of mosquito development, increases the efficacy of pyriproxyfen and prolongs the duration of a single application. This systematic literature review clearly shows that there is a need for further studies, preferably utilising cluster-randomised controlled (cRCT) designs, to investigate the community effectiveness of pyriproxyfen and to link entomological outcomes to human dengue transmission.
Collapse
Affiliation(s)
- Dorit Maoz
- Department of Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Tara Ward
- Public Health Specialist, Accra, Ghana
| | - Moody Samuel
- Institute of Public Health, University of Heidelberg, Heidelberg, Germany
| | - Pie Müller
- Department of Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | | | - Joao Toledo
- Public Health Specialist, Ministry of Health, Brasilia, Brazil
| | - Ross Boyce
- Division of Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Raman Velayudhan
- Department for the Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Olaf Horstick
- Institute of Public Health, University of Heidelberg, Heidelberg, Germany
- * E-mail:
| |
Collapse
|
12
|
Sweet waste extract uptake by a mosquito vector: Survival, biting, fecundity responses, and potential epidemiological significance. Acta Trop 2017; 169:84-92. [PMID: 28174057 DOI: 10.1016/j.actatropica.2017.01.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 01/17/2017] [Accepted: 01/17/2017] [Indexed: 01/23/2023]
Abstract
In nature, adult mosquitoes typically utilize nectar as their main energy source, but they can switch to other as yet unidentified sugary fluids. Contemporary lifestyles, with their associated unwillingness to consume leftovers and improper disposal of waste, have resulted in the disposal of huge amounts of waste into the environment. Such refuse often contains unfinished food items, many of which contain sugar and some of which can collect water from rain and generate juices. Despite evidence that mosquitoes can feed on sugar-rich suspensions, semi-liquids, and decaying fruits, which can be abundant in garbage sites, the impacts of sweet waste fluids on dengue vectors are unknown. Here, we investigated the effects of extracts from some familiar sweet home waste items on key components of vectorial capacity of Aedes aegypti. Adult mosquitoes were fed one of five diets in this study: water (WAT); sucrose (SUG); bakery product (remnant of chocolate cake, BAK); dairy product (yogurt, YOG); and fruit (banana (BAN). Differences in survival, response time to host, and egg production were examined between groups. For both males and females, maintenance on BAK extract resulted in marked survival levels that were similar to those seen with SUG. Sweet waste extracts provided better substrates for survival compared to water, but this superiority was mostly seen with BAK. Females maintained on BAK, YOG, and BAN exhibited shorter response times to a host compared to their counterparts maintained on SUG. The levels of egg production were equivalent in waste extract- and SUG-fed females. The findings presented here illustrate the potential of sweet waste-derived fluids to contribute to the vectorial capacity of dengue vectors and suggest the necessity of readdressing the issue of waste disposal, especially that of unfinished sweet foods. Such approaches can be particularly relevant in dengue endemic areas where rainfall is frequent and waste collection infrequent.
Collapse
|
13
|
Ellison HE, Estévez-Lao TY, Murphree CS, Hillyer JF. Deprivation of both sucrose and water reduces the mosquito heart contraction rate while increasing the expression of nitric oxide synthase. JOURNAL OF INSECT PHYSIOLOGY 2015; 74:1-9. [PMID: 25640058 DOI: 10.1016/j.jinsphys.2015.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 01/13/2015] [Accepted: 01/20/2015] [Indexed: 06/04/2023]
Abstract
Adult female mosquitoes rely on carbohydrate-rich plant nectars as their main source of energy. In the present study we tested whether the deprivation of a carbohydrate dietary source or the deprivation of both carbohydrate and water affects mosquito heart physiology. Intravital video imaging of Anopheles gambiae showed that, relative to sucrose fed mosquitoes, the deprivation of both sucrose and water for 24h, but not the deprivation of sucrose alone, reduces the heart contraction rate. Measurement of the protein, carbohydrate and lipid content of mosquitoes in the three treatment groups did not explain this cardiac phenotype. However, while the deprivation of sucrose reduced mosquito weight and abdominal width, the deprivation of both sucrose and water reduced mosquito weight even further without augmenting the change in abdominal width, indirectly suggesting that starvation and dehydration reduces hemolymph pressure. Analysis of the mRNA levels of crustacean cardioactive peptide (CCAP), FMRFamide, corazonin, neuropeptide F and short neuropeptide F then suggested that these neuropeptides do not regulate the cardiac phenotype observed. However, relative to sucrose fed and sucrose deprived mosquitoes, the mRNA level of nitric oxide synthase (NOS) was significantly elevated in mosquitoes that had been deprived of both sucrose and water. Given that nitric oxide suppresses the heart rate of vertebrates and invertebrates, these data suggest a role for this free radical in modulating mosquito heart physiology.
Collapse
Affiliation(s)
- Haley E Ellison
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA; Department of Biology, Belmont University, Nashville, TN, USA
| | - Tania Y Estévez-Lao
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA
| | | | - Julián F Hillyer
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA.
| |
Collapse
|