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Aedes aegypti

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https://www.readbyqxmd.com/read/28213320/comparative-analysis-of-mosquito-diptera-culicidae-aedes-aegypti-liston-responses-to-the-insecticide-temephos-and-plant-derived-essential-oil-derived-from-piper-betle-l
#1
Prabhakaran Vasantha-Srinivasan, Sengottayan Senthil-Nathan, Athirstam Ponsankar, Annamalai Thanigaivel, Edward-Sam Edwin, Selvaraj Selin-Rani, Muthiah Chellappandian, Venkatraman Pradeepa, Jalasteen Lija-Escaline, Kandaswamy Kalaivani, Wayne B Hunter, Veeramuthu Duraipandiyan, Naif Abdullah Al-Dhabi
Resistance to treatments with Temephos or plant derived oil, Pb-CVO, between a field collected Wild Strain (WS) and a susceptible Laboratory Strain (LS) of Ae. aegypti were measured. The Temephos (0.1mg/L) showed the greatest percentage of mosquito mortality compared to Pb-CVO (1.5mg/L) in LS Ae. aegypti. However, WS Ae. aegypti was not significantly affected by Temephos (0.1mg/L) treatment compare to the Pb-CVO (1.5mg/L). However, both strains (LS and WS) when treated with Pb-CVO (1.5mg/L) displayed steady larval mortality rate across all instars...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28212349/household-dengue-prevention-interventions-expenditures-and-barriers-to-aedes-aegypti-control-in-machala-ecuador
#2
Naveed Heydari, David A Larsen, Marco Neira, Efraín Beltrán Ayala, Prissila Fernandez, Jefferson Adrian, Rosemary Rochford, Anna M Stewart-Ibarra
The Aedes aegypti mosquito is an efficient vector for the transmission of Zika, chikungunya, and dengue viruses, causing major epidemics and a significant social and economic burden throughout the tropics and subtropics. The primary means of preventing these diseases is household-level mosquito control. However, relatively little is known about the economic burden of Ae. aegypti control in resource-limited communities. We surveyed residents from 40 households in a high-risk community at the urban periphery in the city of Machala, Ecuador, on dengue perceptions, vector control interventions, household expenditures, and factors influencing purchasing decisions...
February 16, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28208855/dengue-an-analysis-of-epidemiological-pattern-over-a-six-year-period
#3
Nidhi Singla, Preeti Chaudhary, Monika Thakur, Jagdish Chander
INTRODUCTION: Dengue is an arboviral infection transmitted among humans by Aedes aegypti, the urban vector and Aedes albopictus as a maintenance vector in sub-urban and rural areas. The diagnosis is routinely established by detection of NS1 antigen and/or by IgM antibodies testing. Dengue infects 50-100 million cases per year worldwide with atleast half million serious cases needing hospitalization. Therefore, it is necessary to keep the surveillance ongoing to timely look out for changes occurring in disease pattern over a geographical area...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207332/leaking-containers-success-and-failure-in-controlling-the-mosquito-aedes-aegypti-in-brazil
#4
Ilana Löwy
In 1958, the Pan American Health Organization declared that Brazil had successfully eradicated the mosquito Aedes aegypti, responsible for the transmission of yellow fever, dengue fever, chikungunya, and Zika virus. Yet in 2016 the Brazilian minister of health described the situation of dengue fever as "catastrophic." Discussing the recent epidemic of Zika virus, which amplified the crisis produced by the persistence of dengue fever, Brazil's president declared in January 2016 that "we are in the process of losing the war against the mosquito Aedes aegypti...
February 16, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28206869/acoustic-control-of-mosquito-larvae-in-artificial-drinking-water-containers
#5
Seth C Britch, Herbert Nyberg, Robert L Aldridge, Tom Swan, Kenneth J Linthicum
Emerging technology designed to kill mosquito larvae with sound waves may present a nonchemical and nonbiological alternative to reduce larval populations of key medically important mosquito species such as Aedes aegypti in containers or catchments of water. These devices could benefit integrated vector management programs facing public resistance to the use of chemical or biological larvicides in stored drinking water. In this study we investigate the efficacy of a Larvasonic SD-Mini Acoustic Larvicide device in reducing larval populations of Ae...
December 2016: Journal of the American Mosquito Control Association
https://www.readbyqxmd.com/read/28206856/effect-of-photoperiod-on-permethrin-resistance-in-aedes-aegypti
#6
O Karina Villanueva, Gustavo Ponce, Beatriz Lopez, Selene M Gutierrez, Iram P Rodriguez, Guadalupe Reyes, Karla J Saavedra, William C Black, Julian Garcia, Barry Beaty, Lars Eisen, Adriana E Flores
Living organisms have been exposed to light-dark cycles that allowed them to adapt to different ecological niches. Circadian cycles affect hormone release, metabolism, and response to xenobiotic compounds. Current studies have shown that insect susceptibility to toxic agents depends on circadian cycles, mainly because the biochemical processes involved in detoxification and responses to oxidative stress are modulated by this process. The goal of this study was to determine the effect of photoperiod on resistance to permethrin in Aedes aegypti ...
December 2016: Journal of the American Mosquito Control Association
https://www.readbyqxmd.com/read/28205633/does-zika-virus-infection-affect-mosquito-response-to-repellents
#7
Walter S Leal, Rosângela M R Barbosa, Fangfang Zeng, Gabriel B Faierstein, Kaiming Tan, Marcelo H S Paiva, Duschinka R D Guedes, Mônica M Crespo, Constância F J Ayres
The World Health Organization (WHO) recommends that people travelling to or living in areas with Zika virus (ZIKV) outbreaks or epidemics adopt prophylactic measures to reduce or eliminate mosquito bites, including the use of insect repellents. It is, however, unknown whether repellents are effective against ZIKV-infected mosquitoes, in part because of the ethical concerns related to exposing a human subject's arm to infected mosquitoes in the standard arm-in-cage assay. We used a previously developed, human subject-free behavioural assay, which mimics a human subject to evaluate the top two recommended insect repellents...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28199361/bombyx-mori-and-aedes-aegypti-form-multi-functional-immune-complexes-that-integrate-pattern-recognition-melanization-coagulants-and-hemocyte-recruitment
#8
Dennis R Phillips, Kevin D Clark
The innate immune system of insects responds to wounding and pathogens by mobilizing multiple pathways that provide both systemic and localized protection. Key localized responses in hemolymph include melanization, coagulation, and hemocyte encapsulation, which synergistically seal wounds and envelop and destroy pathogens. To be effective, these pathways require a targeted deposition of their components to provide protection without compromising the host. Extensive research has identified a large number of the effectors that comprise these responses, but questions remain regarding their post-translational processing, function, and targeting...
2017: PloS One
https://www.readbyqxmd.com/read/28199323/a-large-scale-biorational-approach-using-bacillus-thuringiensis-israeliensis-strain-am65-52-for-managing-aedes-aegypti-populations-to-prevent-dengue-chikungunya-and-zika-transmission
#9
Catherine A Pruszynski, Lawrence J Hribar, Robert Mickle, Andrea L Leal
BACKGROUND: Aedes aegypti is a container-inhabiting mosquito and a vector of dengue, chikungunya, and Zika viruses. In 2009 several cases of autochthonous dengue transmission were reported in Key West, Florida, USA prompting a comprehensive response to control A. aegypti. In Key West, larvae of this mosquito develop in containers around human habitations which can be numerous and labor intensive to find and treat. Aerial applications of larvicide covering large areas in a short time can be an efficient and economical method to control A...
2017: PloS One
https://www.readbyqxmd.com/read/28196656/a-cdna-clone-launched-platform-for-high-yield-production-of-inactivated-zika-vaccine
#10
Yujiao Yang, Chao Shan, Jing Zou, Antonio E Muruato, Diniz Nunes Bruno, Barbosa de Almeida Medeiros Daniele, Pedro F C Vasconcelos, Shannan L Rossi, Scott C Weaver, Xuping Xie, Pei-Yong Shi
A purified inactivated vaccine (PIV) using the Zika virus (ZIKV) Puerto Rico strain PRVABC59 showed efficacy in monkeys, and is currently in a phase I clinical trial. High-yield manufacture of this PIV is essential for its development and vaccine access. Here we report an infectious cDNA clone-launched platform to maximize its yield. A single NS1 protein substitution (K265E) was identified to increase ZIKV replication on Vero cells (a cell line approved for vaccine production) for both Cambodian FSS13025 and Puerto Rico PRVABC59 strains...
February 6, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28193291/meteorological-variables-and-mosquito-monitoring-are-good-predictors-for-infestation-trends-of-aedes-aegypti-the-vector-of-dengue-chikungunya-and-zika
#11
Danielle Andreza da Cruz Ferreira, Carolin Marlen Degener, Cecilia de Almeida Marques-Toledo, Maria Mercedes Bendati, Liane Oliveira Fetzer, Camila P Teixeira, Álvaro Eduardo Eiras
BACKGROUND: Aedes aegypti is an important vector for arboviroses and widely distributed throughout the world. Climatic factors can influence vector population dynamics and, consequently, disease transmission. The aim of this study was to characterize the temporal dynamics of an Ae. aegypti population and dengue cases and to investigate the relationship between meteorological variables and mosquito infestation. METHODS: We monitored and analyzed the adult female Ae...
February 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28193261/prevalence-of-dengue-and-diversity-of-cultivable-bacteria-in-vector-aedes-aegypti-l-from-two-dengue-endemic-districts-kanchanpur-and-parsa-of-nepal
#12
Srinivas Thapa, Narayan Dutt Pant, Rojina Shrestha, Ganga Gc, Bidya Shrestha, Basu Dev Pandey, Ishan Gautam
BACKGROUND: Dengue fever, an endemic arboviral disease, represents one of the major public health concerns in Nepal. It is transmitted by bites of infected Aedes aegypti and Aedes albopictus, the former being primary vector. The bacterial community plays a significant role in biology of mosquitoes; however, the bacterial communities of primary vector A. aegypti remain unstudied in Nepal. The study was designed to determine the rate of dengue seropositivity and to explore the bacterial diversity of A...
February 13, 2017: Journal of Health, Population, and Nutrition
https://www.readbyqxmd.com/read/28188766/leptolegnia-chapmanii-straminipila-peronosporomycetes-as-a-future-biorational-tool-for-the-control-of-aedes-aegypti-l
#13
REVIEW
A C Gutierrez, M E Rueda Páramo, M L Falvo, C C López Lastra, J J García
The aim of the present review is to summarize the current knowledge about Leptolegnia chapmanii as a pathogen of mosquito larvae. To this end, we present data on its identification, distribution, host range and effects on non-target organisms, effects of environmental factors, in vitro growth, release and persistence in anthropic environments, and effect combined with other insecticides. The data presented allow confirming its potential as a biocontrol agent.
February 8, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28187780/levels-of-insecticide-resistance-to-deltamethrin-malathion-and-temephos-and-associated-mechanisms-in-aedes-aegypti-mosquitoes-from-the-guadeloupe-and-saint-martin-islands-french-west-indies
#14
Daniella Goindin, Christelle Delannay, Andric Gelasse, Cédric Ramdini, Thierry Gaude, Frédéric Faucon, Jean-Philippe David, Joël Gustave, Anubis Vega-Rua, Florence Fouque
BACKGROUND: In the Guadeloupe and Saint Martin islands, Aedes aegypti mosquitoes are the only recognized vectors of dengue, chikungunya, and Zika viruses. For around 40 years, malathion was used as a mosquito adulticide and temephos as a larvicide. Since the European Union banned the use of these two insecticide molecules in the first decade of the 21st century, deltamethrin and Bacillus thuringiensis var. israelensis are the remaining adulticide and larvicide, respectively, used in Guadeloupe...
February 10, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28187183/laboratory-strains-of-aedes-aegypti-are-competent-to-brazilian-zika-virus
#15
André Luis Costa-da-Silva, Rafaella Sayuri Ioshino, Helena Rocha Corrêa de Araújo, Bianca Burini Kojin, Paolo Marinho de Andrade Zanotto, Danielle Bruna Leal Oliveira, Stella Rezende Melo, Edison Luiz Durigon, Margareth Lara Capurro
The Zika virus outbreaks are unprecedented human threat in relation to congenital malformations and neurological/autoimmune complications. Since this virus has high potential to spread in regions presenting the vectors, improvement in mosquito control is a top priority. Thus, Aedes aegypti laboratory strains will be fundamental to support studies in different research fields implicated on Zika-mosquito interactions which are the basis for the development of innovative control methods. In this sense, our aim was to determine the main infection aspects of a Brazilian Zika strain in reference Aedes aegypti laboratory mosquitoes...
2017: PloS One
https://www.readbyqxmd.com/read/28186749/aedes-aegypti-larvicidal-sesquiterpene-alkaloids-from-maytenus-oblongata
#16
Seindé Touré, Charlotte Nirma, Michael Falkowski, Isabelle Dusfour, Isabelle Boulogne, Arnaud Jahn-Oyac, Maïra Coke, Didier Azam, Romain Girod, Céline Moriou, Guillaume Odonne, Didier Stien, Emeline Houël, Véronique Eparvier
Four new sesquiterpene alkaloids (1-4) with a β-dihydroagrofuran skeleton and a new triterpenoid (5) were isolated from an ethyl acetate extract of Maytenus oblongata stems. Their structures were elucidated using 1D and 2D NMR spectroscopy as well as MS and ECD experiments. The M. oblongata stem EtOAc extract and the pure compounds isolated were tested for larvicidal activity against Aedes aegypti under laboratory conditions, and compounds 2 and 3 were found to be active.
February 10, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28185126/zika-virus-and-neuroscience-the-need-for-a-translational-collaboration
#17
Lavínia Schuler-Faccini, Paulo Roehe, Eduardo R Zimmer, André Quincozes-Santos, Adriano M de Assis, Elizabeth Obino Cirne Lima, Jorge Almeida Guimarães, Cesar Victora, Vivaldo Moura Neto, Diogo O Souza
Zika virus (ZIKV) has become a major challenge for scientists and health agencies. ZIKV's involvement with human fetal microcephaly and Guillain-Barré syndrome and its transmission through Aedes africanus and Aedes aegypti mosquitos highlighted the epidemiological and neurological risks associated to ZIKV infection. In 2013, ZIKV arrives in Brazil but the first outbreak in the country was reported in 2015. Here, we used the Web of Science as a search tool for comparing the evolution of world and Brazilian scientific research on dengue virus (DENV)-also present in mosquito-, ZIKV and microcephaly...
February 9, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28182667/environmental-and-social-change-drive-the-explosive-emergence-of-zika-virus-in-the-americas
#18
REVIEW
Sofia Ali, Olivia Gugliemini, Serena Harber, Alexandra Harrison, Lauren Houle, Javarcia Ivory, Sierra Kersten, Rebia Khan, Jenny Kim, Chris LeBoa, Emery Nez-Whitfield, Jamieson O'Marr, Emma Rothenberg, R Max Segnitz, Stephanie Sila, Anna Verwillow, Miranda Vogt, Adrienne Yang, Erin A Mordecai
Since Zika virus (ZIKV) was detected in Brazil in 2015, it has spread explosively across the Americas and has been linked to increased incidence of microcephaly and Guillain-Barré syndrome (GBS). In one year, it has infected over 500,000 people (suspected and confirmed cases) in 40 countries and territories in the Americas. Along with recent epidemics of dengue (DENV) and chikungunya virus (CHIKV), which are also transmitted by Aedes aegypti and Ae. albopictus mosquitoes, the emergence of ZIKV suggests an ongoing intensification of environmental and social factors that have given rise to a new regime of arbovirus transmission...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28181326/single-molecule-rna-sequencing-uncovers-trans-splicing-and-improves-annotations-in-anopheles-stephensi
#19
X Jiang, A B Hall, J K Biedler, Z Tu
Single molecule real-time (SMRT) sequencing has recently been used to obtain full-length cDNA sequences that improve genome annotation and reveal RNA isoforms. Here, we used one such method called isoform sequencing from Pacific Biosciences (PacBio) to sequence a cDNA library from the Asian malaria mosquito Anopheles stephensi. More than 600 000 full-length cDNAs, referred to as reads of insert, were identified. Owing to the inherently high error rate of PacBio sequencing, we tested different approaches for error correction...
February 9, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28180996/predicting-the-potential-role-of-non-human-hosts-in-zika-virus-maintenance
#20
Constantino González-Salazar, Christopher R Stephens, Víctor Sánchez-Cordero
Arboviruses are often maintained in complex cycles involving vertebrates such as mammals or birds and blood-feeding mosquitoes. However, the role of wildlife hosts in their emergence or re-emergence in human populations has received little attention. The recent emergence of Zika virus in America, and previous occurrences of chikungunya and dengue, forces us to confront a potential new disease-emergence phenomenon. Using a spatial data mining framework to identify potential biotic interactions, based on the degree of co-occurrence between different species, we identified those mammal species with the highest potential for establishing mammal-vector interactions, considering as principal vector Aedes aegypti...
February 8, 2017: EcoHealth
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