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Aedes aegypti

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https://www.readbyqxmd.com/read/29923520/field-testing-evaluation-of-the-efficacy-duration-of-effectiveness-of-a-biolarvicide-bactivec-%C3%A2-sc-bacillus-thuringiensis-var-israelensis-sh-14-in-bengaluru-india
#1
Sreehari Uragayala, Raghavendra Kamaraju, Satyanarayan Tiwari, Susanta Kumar Ghosh, Neena Valecha
Background & objectives: Different formulations of Bacillus thuringiensis var. israelensis (Bti) have been tested against different mosquito vectors and other insects for their residual activity. In the present study, the efficacy and residual activity of a new formulation of Bti (Bactivec Suspension Concentrate) were evaluated against immature stages of Anopheles stephensi Liston (Diptera: Culicidae), Aedes aegypti Linnaeus (Diptera: Culicidae) and Culex quinquefasciatus Say (Diptera: Culicidae), in natural habitats in Phase II and Phase III in Bengaluru, India...
March 2018: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29916450/human-blood-as-the-only-source-of-aedes-aegypti-in-churches-from-merida-yucatan-mexico
#2
Carlos M Baak-Baak, Nohemi Cigarroa-Toledo, Guadalupe A Cruz-Escalona, Carlos Machain-Williams, Rodrigo Rubi-Castellanos, Oswaldo M Torres-Chable, Raul Torres-Zapata, Julian E Garcia-Rejon
No abstract text is available yet for this article.
January 2018: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29916445/salinity-tolerant-aedes-aegypti-and-ae-albopictus-infection-with-dengue-virus-and-contribution-to-dengue-transmission-in-a-coastal-peninsula
#3
S N Surendran, T Veluppillai, T Eswaramohan, K Sivabalakrishnan, F Noordeen, R Ramasamy
Background & objectives: Aedes aegypti and Ae. albopictus are major arboviral vectors that are considered to lay eggs, and undergo preimaginal development only in fresh water collections. However, recently they have been also shown to develop in coastal brackish water habitats. The ability of the biologically variant salinity-tolerant Aedes vectors to transmit arboviral diseases is unknown. We therefore, investigated the infection of salinity-tolerant Aedes mosquitoes with dengue virus (DENV) and analysed dengue incidence and rainfall data to assess the contribution of salinity-tolerant Aedes vectors to dengue transmission in the coastal Jaffna peninsula in Sri Lanka...
January 2018: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29908171/screening-of-natural-wolbachia-infection-in-aedes-aegypti-aedes-taeniorhynchus-and-culex-quinquefasciatus-from-guadeloupe-french-west-indies
#4
D Goindin, A Cannet, C Delannay, C Ramdini, J Gustave, C Atyame, A Vega-Rúa
Guadeloupe islands are threatened by several mosquito-borne viruses such as Dengue, Chikungunya, Zika and West Nile virus. It appears essential to look for alternative mosquito control methods such as the incompatible insect technique (ITT) aiming at sterilizing wild females by inundative releases of incompatible males. Before considering the implementation of such a strategy, the characterization of genetic diversity of the endocellular bacterium Wolbachia regarding the local mosquito populations is a critical issue...
June 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29906475/prediction-and-prevention-of-urban-arbovirus-epidemics-a-challenge-for-the-global-virology-community
#5
REVIEW
Scott C Weaver
The recent emergence and rapid spread of Zika virus in tropical regions of the Western Hemisphere took arbovirologists and public health officials by surprise, and the earlier transfers of West Nile and chikungunya viruses from the Old to the New World were also unexpected. These pandemics underscore the increasing threat of zoonotic arboviruses, especially those that are capable of entering into human-amplified, urban transmission cycles transmitted by Aedes (Stegomyia) aegypti and sometimes other Aedes (Stegomyia) spp...
June 13, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29901734/lack-of-evidence-for-natural-wolbachia-infections-in-aedes-aegypti-diptera-culicidae
#6
Andrea Gloria-Soria, Tommaso G Chiodo, Jeffrey R Powell
Wolbachia is a genus of endosymbiotic bacteria that infects 66% of all insect species. Its major impact on insects is in reproduction: sterility, production of one sex, and/or parthenogenesis. Another effect was discovered when the disease-transmitting mosquito, Aedes aegypti Linnaeus (Diptera: Culicidae), was infected with Wolbachia isolated from Drosophila: infected female mosquitoes became less capable of transmitting diseases such as dengue fever and chikungunya. This has led to releases of Ae. aegypti carrying Wolbachia in an attempt to control disease...
June 13, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29899128/restoration-of-pyrethroid-susceptibility-in-a-highly-resistant-aedes-aegypti-population
#7
Marissa K Grossman, Valentin Uc-Puc, Julian Rodriguez, David J Cutler, Levi T Morran, Pablo Manrique-Saide, Gonzalo M Vazquez-Prokopec
Insecticide resistance has evolved in disease vectors worldwide, creating the urgent need to either develop new control methods or restore insecticide susceptibility to regain use of existing tools. Here we show that phenotypic susceptibility can be restored in a highly resistant field-derived strain of Aedes aegypti in only 10 generations through rearing them in the absence of insecticide.
June 2018: Biology Letters
https://www.readbyqxmd.com/read/29898004/signifying-zika-heterogeneity-in-the-representations-of-the-virus-by-history-of-infection
#8
Gilvan Ramalho Guedes, Raquel Zanatta Coutinho, Leticia Marteleto, Wesley Henrique Silva Pereira, Denise Duarte
Despite having been broadly advertised by the mass media, many negative consequences of the Zika virus have been less significant than originally predicted. It is likely that after a few months from the epidemic's onset, personal experience with the virus has altered the person's way to deal with the disease. This study explores the relation between exposure to Zika virus and the social representation of the epidemic. More specifically, one analyzes if increased exposure to the risk of Zika infection changes the characteristics of the web of meanings surrounding the epidemic...
June 7, 2018: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/29891373/evaluation-of-the-effects-of-the-larvicides-temephos-on-reproductive-performance-embryofetal-development-and-dna-integrity-of-swiss-mice
#9
Juliana Miron Vani, Laynna de Carvalho Schweich, Karla Regina Warszawski de Oliveira, Sarah Alves Auharek, Andréa Luiza Cunha-Laura, Andréia Conceição Millan Brochado Antoniolli-Silva, Carlos Eduardo Domingues Nazario, Rodrigo Juliano Oliveira
Temephos is considered the gold standard by the Ministry of Health for controlling the larvae of the mosquito Aedes aegypti. The present study evaluated the effects of Temephos larvicide on the reproductive performance, embryo-fetal development and DNA integrity of Swiss mice. This study used 30 pregnant female mice: 10 were controls treated with drinking water at a dosage of 0.1 mL/10 g (body weight - b.w., administered orally - a.o.), and 20 were treated with Temephos at doses of 0.0043 mg/kg and 0...
June 2018: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29890711/what-does-the-future-hold-for-yellow-fever-virus-i
#10
REVIEW
Raphaëlle Klitting, Ernest A Gould, Christophe Paupy, Xavier de Lamballerie
The recent resurgence of yellow fever virus (YFV) activity in the tropical regions of Africa and South America has sparked renewed interest in this infamous arboviral disease. Yellow fever virus had been a human plague for centuries prior to the identification of its urban transmission vector, the Aedes ( Stegomyia ) aegypti (Linnaeus) mosquito species, and the development of an efficient live-attenuated vaccine, the YF-17D strain. The combination of vector-control measures and vaccination campaigns drastically reduced YFV incidence in humans on many occasions, but the virus never ceased to circulate in the forest, through its sylvatic invertebrate vector(s) and vertebrate host(s)...
June 8, 2018: Genes
https://www.readbyqxmd.com/read/29889847/a-transcriptomic-survey-of-the-impact-of-environmental-stress-on-response-to-dengue-virus-in-the-mosquito-aedes-aegypti
#11
David S Kang, Martin S Barron, Diane D Lovin, Joanne M Cunningham, Matthew W Eng, Dave D Chadee, Jun Li, David W Severson
Populations of Aedes aegypti naturally exhibit variable susceptibility to dengue viruses. This natural variation can be impacted by nutritional stress resulting from larval-stage crowding, indicating the influence of environment components on the adult mosquito immune response. In particular, larval crowding was previously shown to reduce the susceptibility of adult females of a Trinidad field isolate of A. aegypti to the dengue serotype 2 (JAM1409) virus. Here, we present the first whole transcriptome study to address the impact of environmental stress on A...
June 11, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29885618/target-and-non-target-toxicity-of-fern-extracts-against-mosquito-vectors-and-beneficial-aquatic-organisms
#12
Chinnaperumal Kamaraj, Paramasivam Deepak, Govindasamy Balasubramani, Sengodan Karthi, Dhayalan Arul, Dilipkumar Aiswarya, Vadivel Amutha, Elangovan Vimalkumar, Damodaran Mathivanan, Sundaram Renjitham Suseem, Chanthini Kanagaraj Muthu-Pandian, Sengottayan Senthil-Nathan, Pachiappan Perumal
Dengue and malaria are significant mosquito-borne diseases that are rapidly spread worldwide, mainly in temperate countries. Pteridophytes were identified to be a significant source of novel mosquitocidal agents. The present research was to explore the eco-friendly larvicides from methanol extracts of ferns, viz., Actiniopteris radiata, Adiantum caudatum, Cheilanthes swartzii, Hemionitis arifolia and Lycopodium clavatum. The larvicidal potential of the extracts screened using larvae of dengue vector Aedes aegypti (III and IV instar) and malarial vector Anopheles stephensi (III and IV instar), showed 10-100% mortality rates...
June 6, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29875751/viral-determinants-and-vector-competence-of-zika-virus-transmission
#13
REVIEW
Hong-Wai Tham, Vinod Balasubramaniam, Man K Ooi, Miaw-Fang Chew
Zika virus (ZIKV) has emerged as a new global health threat. Since its first discovery in Zika forest in Uganda, this virus has been isolated from several mosquito species, including Aedes aegypti and Aedes albopictus . The geographical distribution of these mosquito species across tropical and subtropical regions has led to several outbreaks, including the recent pandemic in Brazil, followed by the Pacific islands and other areas of North and South America. This has gained attention of the scientific community to elucidate the epidemiology and transmission of ZIKV...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29874051/a-multiscale-approach-to-decipher-molecular-mechanisms-involved-in-the-direct-and-intergenerational-effect-of-ibuprofen-on-the-mosquito-aedes-aegypti
#14
Sophie Prud'homme, David Renault, Jean-Philippe David, Stephane Reynaud
The anti-inflammatory ibuprofen is an ubiquitous surface water contaminant. However, chronic impact of this pharmaceutical on aquatic invertebrate populations remains poorly known. In the model insect Aedes aegypti, we investigated the intergenerational consequences of parental chronic exposure to an environmentally relevant concentration of ibuprofen. While exposed individuals did not showed any phenotypic changes, their progeny showed an accelerated development and an increased tolerance to starvation. To understand the mechanistic processes underlying the direct and intergenerational impacts of ibuprofen, we combined transcriptomic, metabolomics and hormone kinetics studies on several life-stages of exposed individuals and their progeny...
June 6, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29873741/effects-of-temephos-permethrin-and-eucalyptus-nitens-essential-oil-on-survival-and-swimming-behavior-of-aedes-aegypti-and-anopheles-pseudopunctipennis-diptera-culicidae-larvae
#15
Agustín Alvarez Costa, Paula V Gonzalez, Laura V Harburguer, Héctor M Masuh
An essential strategy to deal with mosquito-borne diseases is the control of larvae in their development sites. The mosquitoes Anopheles pseudopunctipennis (Theobald) (Diptera: Culicidae), a malaria vector, and Aedes aegypti (L.) (Diptera: Culicidae), vector of dengue, Zika, yellow fever, and chikungunya viruses, breed in very different habitats. Insecticide treatments of mosquito larvae focus mainly on their lethal effects. However, insecticide degradation or the poor dosage of larvicides will invariably lead to the sublethal exposure of a target (and nontarget) species, the nonlethal effects of these compounds may have important effects on vital insect activities, and therefore their evaluation is necessary...
June 4, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29871615/vertical-transmission-of-dengue-virus-in-the-yogyakarta-airport-area
#16
Tri Baskoro Tunggul Satoto, Antok Listyantanto, Suzana Dewi Agustjahjani, Hari Kusnanto Josef, Barandi S Widartono
BACKGROUND: International Health Regulations controls international travel including human movement, disease vector, and imported items to prevent the spread of dengue, especially in seaports, airports, and border crossing posts. This study aimed to determine dengue Transovarial Transmission Index (TTI) and distribution of dengue virus in the areas around Adisucipto Airport of Yogyakarta, Indonesia. METHODS: The study was a descriptive analytic study with cross sectional design, conducted by mapping the spread of the dengue virus and identifying TTI in Adisucipto Airport...
June 5, 2018: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29869610/differential-effects-of-temperature-and-mosquito-genetics-determine-transmissibility-of-arboviruses-by-aedes-aegypti-in-argentina
#17
Alexander T Ciota, Pamela A Chin, Dylan J Ehrbar, Maria Victoria Micieli, Dina M Fonseca, Laura D Kramer
Aedes aegypti (L.) (Diptera: Culicidae) have a global distribution and are the primary vector of a number of mosquito-borne viruses responsible for epidemics throughout the Americas. As in much of South America, the threat from pathogens including dengue virus (DENV; Flaviviridae, Flavivirus ) and chikungunya virus (CHIKV; Togaviridae, Alphavirus ) has increased in Argentina in recent years. The complexity of transmission cycles makes predicting the occurrence and intensity of arbovirus outbreaks difficult...
June 4, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29868532/serosurvey-of-human-antibodies-recognizing-aedes-aegypti-d7-salivary-proteins-in-colombia
#18
Berlin L Londono-Renteria, Heman Shakeri, Paula Rozo-Lopez, Michael J Conway, Natasha Duggan, Majid Jaberi-Douraki, Tonya M Colpitts
Background: Dengue is one of the most geographically significant mosquito-borne viral diseases transmitted by Aedes mosquitoes. During blood feeding, mosquitoes deposit salivary proteins that induce antibody responses. These can be related to the intensity of exposure to bites. Some mosquito salivary proteins, such as D7 proteins, are known as potent allergens. The antibody response to D7 proteins can be used as a marker to evaluate the risk of exposure and disease transmission and provide critical information for understanding the dynamics of vector-host interactions...
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29867036/effect-of-the-topical-repellent-para-menthane-3-8-diol-on-blood-feeding-behavior-and-fecundity-of-the-dengue-virus-vector-aedes-aegypti
#19
Jugyeong Lee, Diane B Choi, Fang Liu, John P Grieco, Nicole L Achee
Dengue fever is an acute disease caused by the dengue virus and transmitted primarily by the mosquito Aedes aegypti . The current strategy for dengue prevention is vector control including the use of topical repellents to reduce mosquito biting. Although N , N -diethyl-m-methylbenzamide (DEET) is the most common active ingredient in topical repellent products, para-menthane-3,8-diol (PMD) is also used commercially. Studies have indicated PMD reduced biting by 90⁻95% for up to 6⁻8 h, similar to the efficacy of DEET, depending on the testing environment...
June 4, 2018: Insects
https://www.readbyqxmd.com/read/29866193/pyrethroid-resistance-in-the-dengue-vector-aedes-aegypti-in-southeast-asia-present-situation-and-prospects-for-management
#20
REVIEW
Zheng Hua Amelia-Yap, Chee Dhang Chen, Mohd Sofian-Azirun, Van Lun Low
Human arboviral diseases transmitted by Aedes aegypti such as dengue, Zika, chikungunya and yellow fever remain global public health threats to date. Of these diseases, dengue fever is particularly prevalent in Southeast Asia. Relentless vector control efforts are performed to curtail disease transmissions through which pyrethroid insecticides are broadly used as the first line of defense to control Ae. aegypti, especially in the course of disease outbreaks. Here, we compile the largest contemporary database for susceptibility profiles and underlying mechanisms involved in Ae...
June 4, 2018: Parasites & Vectors
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