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https://www.readbyqxmd.com/read/27923950/results-of-a-zika-virus-zikv-immunoglobulin-m-specific-diagnostic-assay-are-highly-correlated-with-detection-of-neutralizing-anti-zikv-antibodies-in-neonates-with-congenital-disease
#1
Marli T Cordeiro, Carlos A A Brito, Lindomar J Pena, Priscila M S Castanha, Laura H V G Gil, Kennya G S Lopes, Rafael Dhalia, Jucille A Meneses, Ana C Ishigami, Luisa M Mello, Liciana X E Alencar, Klarissa M Guarines, Laura C Rodrigues, Ernesto T A Marques
BACKGROUND:  Usually, immunoglobulin M (IgM) serologic analysis is not sufficiently specific to confirm Zika virus (ZIKV) infection. However, since IgM does not cross the placenta, it may be a good marker of infection in neonates. METHODS:  We tested blood from 42 mothers and neonates with microcephaly and collected cerebrospinal fluid (CSF) specimens from 30 neonates. Molecular assays were performed for detection of ZIKV, dengue virus, and chikungunya virus; IgM enzyme-linked immunosorbent assays and plaque-reduction neutralization tests (PRNTs) were performed to detect ZIKV and dengue virus...
December 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27923889/zika-virus-a-serious-global-health-threat
#2
Candice J McNeil, Avinash K Shetty
In February 2016, the World Health Organization declared Zika virus (ZIKV) infection a public health emergency of international concern, given the precipitous spread of the virus across the Americas. Unlike arboviruses such as Chikungunya and Dengue, which have also recently emerged in the western hemisphere, ZIKV was identified in communities where concurrent neurologic conditions such as microcephaly and Guillain-Barre (GB) syndrome were occurring at alarming rates. Thus, investigations to systematically evaluate the link between ZIKV, congenital malformations (including microcephaly) and GB syndrome remain a top priority...
December 5, 2016: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/27922001/anthropogenic-impacts-on-mosquito-populations-in-north-america-over-the-past-century
#3
Ilia Rochlin, Ary Faraji, Dominick V Ninivaggi, Christopher M Barker, A Marm Kilpatrick
The recent emergence and spread of vector-borne viruses including Zika, chikungunya and dengue has raised concerns that climate change may cause mosquito vectors of these diseases to expand into more temperate regions. However, the long-term impact of other anthropogenic factors on mosquito abundance and distributions is less studied. Here, we show that anthropogenic chemical use (DDT; dichlorodiphenyltrichloroethane) and increasing urbanization were the strongest drivers of changes in mosquito populations over the last eight decades in areas on both coasts of North America...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27918261/indoor-development-of-aedes-aegypti-in-germany-2016
#4
Helge Kampen, Stephanie Jansen, Jonas Schmidt-Chanasit, Doreen Walther
In spring 2016, a German traveller returning from Martinique cultivated imported plant offsets in her home, and accidentally bred Aedes aegypti. Thirteen adult mosquito specimens submitted for identification and the traveller were tested for Zika, dengue and chikungunya virus infections, with negative results. The detection of Ae. aegypti by the 'Mueckenatlas' project demonstrates the value of this passive surveillance scheme for potential public health threats posed by invasive mosquitoes in Germany.
November 24, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27903317/laboratory-surveillance-of-arboviral-infections-in-a-southern-france-region-colonized-by-aedes-albopictus
#5
L Cadot, M Segondy, V Foulongne
The establishment of Aedes albopictus in southern France, a recognized competent vector for several arboviruses, represents a new threat for the local transmission and spread of what were until recently considered as tropical diseases. A preparedness and response plan, based on vigilance of both clinicians and laboratories, has introduced significant changes in guidelines and behaviour regarding patients' care specifically during the activity period of mosquitoes. In the present study, we report the results of a 1-year activity in arboviral infection diagnosis...
December 1, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27902502/zika-virus-and-patient-blood-management
#6
Lawrence T Goodnough, Marisa B Marques
Sporadic Zika virus infections had only occurred in Africa and Asia until an outbreak in Micronesia (Oceania) in 2007. In 2013 to 2014, several outer Pacific Islands reported local outbreaks. Soon thereafter, the virus was likely introduced in Brazil from competing athletes from French Polynesia and other countries that participated in a competition there. Transmission is thought to have occurred through mosquito bites and spread to the immunologically naive population. Being also a flavivirus, the Zika virus is transmitted by the Aedes mosquito that is endemic in South and Central America that is also the vector of West Nile virus, dengue, and chikungunya...
November 29, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27886338/frequency-of-the-val1016ile-mutation-on-the-kdr-gene-in-aedes-aegypti-diptera-culicidae-in-south-brazil
#7
M L Collet, C Frizzo, E Orlandin, L D P Rona, J C Nascimento, M A E Montano, G A Müller, G Wagner
Recently, the number of Aedes aegypti foci has increased in west of Santa Catarina, south Brazil, which has increased concern regarding mosquito-borne disease outbreaks such as dengue fever, Zika virus, and chikungunya. Therefore, it is important to monitor genetic resistance to insecticides through "knockdown resistance". Homozygosity (Ile/Ile) at position 1016 in the coding region of a voltage-dependent sodium channel gene (Nav) may induce resistance to pyrethroid insecticides. We evaluated the frequency of these alleles in A...
November 21, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27881181/efficacy-of-ulv-and-thermal-aerosols-of-deltamethrin-for-control-of-aedes-albopictus-in-nice-france
#8
Saïd C Boubidi, David Roiz, Marie Rossignol, Fabrice Chandre, Romain Benoit, Marc Raselli, Charles Tizon, Bernard Cadiou, Reda Tounsi, Christophe Lagneau, Didier Fontenille, Paul Reiter
BACKGROUND: Ultra-low volume (ULV) insecticidal aerosols dispensed from vehicle-mounted cold-foggers are widely considered the method of choice for control of Aedes aegypti and Ae. albopictus during outbreaks of dengue and chikungunya and, more recently, Zika. Nevertheless, their effectiveness has been poorly studied, particularly in Europe. Nearly all published studies of ULV efficacy are bio-assays based on the mortality of caged mosquitoes. In our study we preferred to monitor the direct impact of treatments on the wild mosquito populations...
November 23, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27881148/susceptibility-profile-and-metabolic-mechanisms-involved-in-aedes-aegypti-and-aedes-albopictus-resistant-to-ddt-and-deltamethrin-in-the-central-african-republic
#9
Carine Ngoagouni, Basile Kamgang, Cécile Brengues, Gildas Yahouedo, Christophe Paupy, Emmanuel Nakouné, Mirdad Kazanji, Fabrice Chandre
BACKGROUND: Aedes aegypti and Ae. albopictus are the main epidemic vectors of dengue, chikungunya and Zika viruses worldwide. Their control during epidemics relies mainly on control of larvae and adults with insecticides. Unfortunately, loss of susceptibility of both species to several insecticide classes limits the efficacy of interventions. In Africa, where Aedes-borne viruses are of growing concern, few data are available on resistance to insecticides. To fill this gap, we assessed the susceptibility to insecticides of Ae...
November 24, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27876647/the-invasive-asian-tiger-mosquito-aedes-albopictus-diptera-culicidae-in-germany-local-reproduction-and-overwintering
#10
D Walther, D E Scheuch, H Kampen
Within the framework of a German mosquito monitoring programme, the 'Mueckenatlas' (mosquito atlas) has been established as an instrument of citizen participation in mosquito mapping. In 2015, a strikingly large number of Aedes albopictus, which had not been considered established in Germany, was submitted. Three of six collection sites showed local reproduction, with demonstration of developmental stages over three months at two sites. The third populated site was checked only once in October. Developmental stages of Ae...
November 19, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27876643/the-emergence-of-arthropod-borne-viral-diseases-a-global-prospective-on-dengue-chikungunya-and-zika-fevers
#11
REVIEW
Sandra V Mayer, Robert B Tesh, Nikos Vasilakis
Arthropod-borne viruses (arboviruses) present a substantial threat to human and animal health worldwide. Arboviruses can cause a variety of clinical presentations that range from mild to life threatening symptoms. Many arboviruses are present in nature through two distinct cycles, the urban and sylvatic cycle that are maintained in complex biological cycles. In this review we briefly discuss the factors driving the emergence of arboviruses, such as the anthropogenic aspects of unrestrained human population growth, economic expansion and globalization...
November 19, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27876044/generation-of-monoclonal-antibodies-against-native-viral-proteins-using-antigen-expressing-mammalian-cells-for-mouse-immunization
#12
Natalie Rose, Carlos Augusto Pinho-Nascimento, Alessia Ruggieri, Paola Favuzza, Marco Tamborrini, Hanna Roth, Marcia Terezinha Baroni de Moraes, Hugues Matile, Thomas Jänisch, Gerd Pluschke, Katharina Röltgen
BACKGROUND: Due to their rising incidence and progressive geographical spread, infections with mosquito-borne viruses, such as dengue (DENV), chikungunya and zika virus, have developed into major public health challenges. Since all of these viruses may cause similar symptoms and can occur in concurrent epidemics, tools for their differential diagnosis and epidemiological monitoring are of urgent need. RESULTS: Here we report the application of a novel strategy to rapidly generate monoclonal antibodies (mAbs) against native viral antigens, exemplified for the DENV nonstructural glycoprotein 1 (NS1)...
November 22, 2016: BMC Biotechnology
https://www.readbyqxmd.com/read/27870689/zika-virus-and-diagnostics
#13
Claudia Raja Gabaglia
PURPOSE OF REVIEW: The purpose of this review is to present what is known about the Zika virus (ZIKV) at the time of writing this review. The viral structure and its phylogeny, as well as the limitations of current available techniques used for diagnosis, are discussed. RECENT FINDINGS: Crystallography and cryo-electron microscopy of the whole ZIKV, or a few of its proteins, are confirming its overall antigenic relatedness to other flaviviruses. Sequencing has revealed its dynamic genetic variation and has placed the Western cluster of Zika isolates within the Asian phylogenic tree...
November 18, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27869959/-zika-dengue-and-chikungunya-challenges-and-issues
#14
Denise Valle, Denise Nacif Pimenta, Raquel Aguiar
No abstract text is available yet for this article.
April 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27869724/mosquito-oviposition-behavior-and-vector-control
#15
REVIEW
Jonathan F Day
The burden of gene transfer from one mosquito generation to the next falls on the female and her eggs. The selection of an oviposition site that guarantees egg and larval survival is a critical step in the reproductive process. The dangers associated with ephemeral aquatic habitats, lengthy droughts, freezing winters, and the absence of larval nutrition makes careful oviposition site selection by a female mosquito extremely important. Mosquito species exhibit a remarkable diversity of oviposition behaviors that ensure eggs are deposited into microenvironments conducive for successful larval development and the emergence of the next mosquito generation...
November 18, 2016: Insects
https://www.readbyqxmd.com/read/27869394/-recommendations-for-the-surveillance-of-aedes-aegypti
#16
Roberto Barrera
Diseases caused by arboviruses transmitted by Aedes aegypti, such as dengue, chikungunya and Zika, continue to rise in annual incidence and geographic expansion. A key limitation for achieving control of A. aegypti has been the lack of effective tools for monitoring its population, and thus determine what control measures actually work. Surveillance of A. aegypti has been based mainly on immature indexes, but they bear little relation to the number of mosquito females, which are the ones capable of transmitting the viruses...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27869391/-first-report-of-the-f1534c-mutation-associated-with-cross-resistance-to-ddt-and-pyrethroids-in-aedes-aegypti-from-colombia
#17
María Claudia Atencia, María De Jesús Pérez, María Cristina Jaramillo, Sandy Milena Caldera, Suljey Cochero, Eduar Elías Bejarano
The main strategy for the control of Aedes aegypti, vector of dengue, chikungunya and Zika viruses, is based on the use of insecticides to reduce its populations. However, their use has led to insect resistance to these chemicals. Objective: To determine the presence of the F1534C mutation associated with cross-resistance to DDT and pyrethroids in A. aegypti in Sincelejo, Colombia. Materials and methods: We studied nine specimens of A. aegypti that showed resistance to lambdacyhalothrin in bioassays developed by the Secretaría de Salud de Sucre...
September 1, 2016: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/27866611/facile-fabrication-of-eco-friendly-nano-mosquitocides-biophysical-characterization-and-effectiveness-on-neglected-tropical-mosquito-vectors
#18
Marimuthu Govindarajan, S L Hoti, Giovanni Benelli
Mosquito (Diptera: Culicidae) vectors are solely responsible for transmitting important diseases such as malaria, dengue, chikungunya, Japanese encephalitis, lymphatic filariasis and Zika virus. Eco-friendly control tools of Culicidae vectors are a priority. In this study, we proposed a facile fabrication process of poly-disperse and stable silver nanoparticles (Ag NPs) using a cheap leaf extract of Ichnocarpus frutescens (Apocyanaceae). Bio-reduced Ag NPs were characterized by UV-vis spectrophotometry, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM)...
December 2016: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/27866470/the-inevitable-colonisation-of-singapore-by-zika-virus
#19
EDITORIAL
Dale Fisher, Jeffery Cutter
Singapore is endemic for Dengue virus, with approximately 10,000 to 20,000 annual cases reported in recent years. In 2012, Chikungunya was introduced, although the numbers of cases reported is much fewer. The current Zika virus pandemic originating in Brazil represents a threat to all regions with Aedes mosquitoes, particularly those well connected by travellers. In this respect, it was felt inevitable that Singapore would eventually realise its third endemic flavivirus. In late August 2016, a primary care practitioner observed a cluster of geographically linked patients attending with fever and rash...
November 21, 2016: BMC Medicine
https://www.readbyqxmd.com/read/27862008/zika-virus-global-health-challenge-threat-and-current-situation
#20
REVIEW
Hafsa Aziz, Aadarash Zia, Amania Anwer, Muneeba Aziz, Shazia Fatima, Muhammad Faheem
ZIKV has emerged as grave global health issue in the past few years. ZIKV was firstly isolated in 1947 from a rhesus sentinel monkey in the Zika forest in Uganda. It is usually transmitted by the bite of infected mosquitoes and infects skin fibroblasts, skin keratinocytes etc. ZIKV until now was under reported because of its clinical similarity with the dengue and chikungunya. It usually spread through the course of the sylvatic cycle. In this cycle, the virus or pathogen lifespan is spent between the wild animal and vectors...
November 10, 2016: Journal of Medical Virology
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