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https://www.readbyqxmd.com/read/28081143/engineered-aedes-aegypti-jak-stat-pathway-mediated-immunity-to-dengue-virus
#1
Natapong Jupatanakul, Shuzhen Sim, Yesseinia I Angleró-Rodríguez, Jayme Souza-Neto, Suchismita Das, Kristin E Poti, Shannan L Rossi, Nicholas Bergren, Nikos Vasilakis, George Dimopoulos
We have developed genetically modified Ae. aegypti mosquitoes that activate the conserved antiviral JAK/STAT pathway in the fat body tissue, by overexpressing either the receptor Dome or the Janus kinase Hop by the blood feeding-induced vitellogenin (Vg) promoter. Transgene expression inhibits infection with several dengue virus (DENV) serotypes in the midgut as well as systemically and in the salivary glands. The impact of the transgenes Dome and Hop on mosquito longevity was minimal, but it resulted in a compromised fecundity when compared to wild-type mosquitoes...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28074128/epidemic-outbreak-of-chikungunya-in-two-neighboring-towns-in-the-colombian-caribbean-a-survival-analysis
#2
Misael Oviedo-Pastrana, Nelson Méndez, Salim Mattar, Germán Arrieta, Luty Gomezcaceres
BACKGROUND: The first autochthonous Chikungunya virus transmission in Colombia was reported in September 2014. Three months later, every town in the Caribbean region was affected, including the bordering towns of Ovejas and Corozal, in the department of Sucre. The objective of the study was to analyze and compare the temporal dynamics of the outbreak of Chikungunya in two towns of the department of Sucre. METHODS: Households with suspicious cases with clinical symptomatology for Chikungunya were enrolled...
2017: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/28069071/sporadic-cases-of-adult-measles-a-research-article
#3
Ranjan Premaratna, Nathasha Luke, Harsha Perera, Mahesh Gunathilake, Pubudu Amarasena, T G A Nilmini Chandrasena
BACKGROUND: Measles caused by a paramyxovirus, characterized by fever, malaise, cough, coryza conjunctivitis, a maculopapular rash is known to result in pneumonia, encephalitis and death. Fatal cases of measles in Sri Lanka are rare after implementation of the National Immunization Programme in 1984. Thereafter 0.1% case fatality rate was observed during October 1999-June 2000 which is a very low figure compared to other regional countries. Immunization guidelines were further revised in 2001, 2011 and in 2012 when additional immunization was recommended to age group 4-21 years; who are likely to have inadequate immunization, in order to achieve elimination of Measles by 2020...
January 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28062794/larvicidal-and-growth-inhibitory-activity-of-entomopathogenic-bacteria-culture-fluids-against-aedes-aegypti-diptera-culicidae
#4
João Luiz Rosa da Silva, Fernanda Undurraga Schwalm, Carlos Eugênio Silva, Marisa da Costa, Ralf Heermann, Onilda Santos da Silva
Dengue, Chikungunya, and Zika are important vector-borne diseases, and Aedes aegypti L. is their main transmitter. As the disease management is mainly based on mosquito control strategies, the search for alternative and cost-effective approaches is ongoing. The Gram-negative bacteria Xenorhabdus nematophila and Photorhabdus luminescens are symbiotically associated with entomopathogenic nematodes and are highly pathogenic for insect larvae. After we have recently confirmed the toxicity of these bacteria in Ae...
January 6, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28062188/a-comprehensive-analysis-and-immunobiology-of-autoimmune-neurological-syndromes-during-the-zika-virus-outbreak-in-c%C3%A3%C2%BAcuta-colombia
#5
Juan-Manuel Anaya, Yhojan Rodríguez, Diana M Monsalve, Daniel Vega, Ernesto Ojeda, Diana González-Bravo, Mónica Rodríguez-Jiménez, Carlos A Pinto-Díaz, Pablo Chaparro, María L Gunturiz, Aftab A Ansari, M Eric Gershwin, Nicolás Molano-González, Carolina Ramírez-Santana, Yeny Acosta-Ampudia
We have focused on the epidemiology and immunobiology of Zika virus (ZIKV) infection and factors associated with the development of Guillain-Barré syndrome (GBS) and other neurological syndromes in Cúcuta, the capital of North Santander department, Colombia. Data of patients with ZIKV disease reported to the national population-based surveillance system were used to calculate the basic reproduction number (R0) and the attack rates (ARs) as well as to develop epidemiological maps. Patients with neurological syndromes were contacted and their diagnoses were confirmed...
January 3, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28054419/identification-and-initial-characterization-of-matrix-metalloproteinases-in-the-yellow-fever-mosquito-aedes-aegypti
#6
A M Kantor, S Dong, N L Held, E Ishimwe, A L Passarelli, R J Clem, A W E Franz
Aedes aegypti is a major vector for arboviruses such as dengue, chikungunya and Zika viruses. During acquisition of a viremic bloodmeal, an arbovirus infects mosquito midgut cells before disseminating to secondary tissues, including the salivary glands. Once virus is released into the salivary ducts it can be transmitted to another vertebrate host. The midgut is surrounded by a basal lamina (BL) in the extracellular matrix, consisting of a proteinaceous mesh composed of collagen IV and laminin. BL pore size exclusion limit prevents virions from passing through...
February 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28033379/targeting-a-hidden-enemy-pyriproxyfen-autodissemination-strategy-for-the-control-of-the-container-mosquito-aedes-albopictus-in-cryptic-habitats
#7
Kshitij Chandel, Devi Shankar Suman, Yi Wang, Isik Unlu, Eric Williges, Gregory M Williams, Randy Gaugler
BACKGROUND: The Asian tiger mosquito, Aedes albopictus, is a vector of dengue, Chikungunya, and Zika viruses. This mosquito inhabits a wide range of artificial water-holding containers in urban and suburban areas making it difficult to control. We tested the hypothesis that female-driven autodissemination of an insect growth regulator could penetrate cryptic oviposition habitats difficult to treat with conventional insecticidal sprays. METHODOLOGY: Oviposition preferences of Ae...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28030537/molecular-virologic-and-clinical-characteristics-of-a-chikungunya-fever-outbreak-in-la-romana-dominican-republic-2014
#8
Rose M Langsjoen, Rebecca J Rubinstein, Tiffany F Kautz, Albert J Auguste, Jesse H Erasmus, Liddy Kiaty-Figueroa, Renessa Gerhardt, David Lin, Kumar L Hari, Ravi Jain, Nicolas Ruiz, Antonio E Muruato, Jael Silfa, Franklin Bido, Matthew Dacso, Scott C Weaver
Since emerging in Saint Martin in 2013, chikungunya virus (CHIKV), an alphavirus transmitted by the Aedes aegypti mosquito, has infected approximately two million individuals in the Americas, with over 500,000 reported cases in the Dominican Republic (DR). CHIKV-infected patients typically present with a febrile syndrome including polyarthritis/polyarthralgia, and a macropapular rash, similar to those infected with dengue and Zika viruses, and malaria. Nevertheless, many Dominican cases are unconfirmed due to the unavailability and high cost of laboratory testing and the absence of specific treatment for CHIKV infection...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28026036/the-re-emerging-arboviral-threat-hidden-enemies-the-emergence-of-obscure-arboviral-diseases-and-the-potential-use-of-wolbachia-in-their-control
#9
Heverton Leandro Carneiro Dutra, Eric Pearce Caragata, Luciano Andrade Moreira
Mayaro, Oropouche, and O'Nyong-Nyong share many traits with more prominent arboviruses, like dengue and yellow fever, chikungunya, and Zika. These include severe clinical symptoms, multiple animal hosts, and widespread vector species living in close proximity to human habitats, all of which constitute significant risk factors for more frequent outbreaks in the future, greatly increasing the potential of these hidden enemies to follow Zika and become the next wave of global arboviral threats. Critically, the current dearth of knowledge on these arboviruses might impede the success of future control efforts, including the potential application of Wolbachia pipientis...
December 27, 2016: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28024241/what-caused-the-2012-dengue-outbreak-in-pucallpa-peru-a%C3%A2-socio-ecological-autopsy
#10
Margot Charette, Lea Berrang-Ford, Elmer Alejandro Llanos-Cuentas, César Cárcamo, Manisha Kulkarni
Dengue is highly endemic in Peru, with increases in transmission particularly since vector re-infestation of the country in the 1980s. Pucallpa, the second largest city in the Peruvian Amazon, experienced a large outbreak in 2012 that caused more than 10,000 cases and 13 deaths. To date, there has been limited research on dengue in the Peruvian Amazon outside of Iquitos, and no published review or critical analysis of the 2012 Pucallpa dengue outbreak. This study describes the incidence, surveillance, and control of dengue in Ucayali to understand the factors that contributed to the 2012 Pucallpa outbreak...
December 8, 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/28011725/indoor-resting-behavior-of-aedes-aegypti-diptera-culicidae-in-acapulco-mexico
#11
Felipe Dzul-Manzanilla, Jésus Ibarra-López, Wilbert Bibiano Marín, Andrés Martini-Jaimes, Joel Torres Leyva, Fabián Correa-Morales, Herón Huerta, Pablo Manrique-Saide, Gonzalo Vazquez M Prokopec
The markedly anthropophilic and endophilic behaviors of Aedes aegypti (L.) make it a very efficient vector of dengue, chikungunya, and Zika viruses. Although a large body of research has investigated the immature habitats and conditions for adult emergence, relatively few studies have focused on the indoor resting behavior and distribution of vectors within houses. We investigated the resting behavior of Ae. aegypti indoors in 979 houses of the city of Acapulco, Mexico, by performing exhaustive indoor mosquito collections to describe the rooms and height at which mosquitoes were found resting...
December 22, 2016: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28011234/epidemic-arboviral-diseases-priorities-for-research-and-public-health
#12
REVIEW
Annelies Wilder-Smith, Duane J Gubler, Scott C Weaver, Thomas P Monath, David L Heymann, Thomas W Scott
For decades, arboviral diseases were considered to be only minor contributors to global mortality and disability. As a result, low priority was given to arbovirus research investment and related public health infrastructure. The past five decades, however, have seen an unprecedented emergence of epidemic arboviral diseases (notably dengue, chikungunya, yellow fever, and Zika virus disease) resulting from the triad of the modern world: urbanisation, globalisation, and international mobility. The public health emergency of Zika virus, and the threat of global spread of yellow fever, combined with the resurgence of dengue and chikungunya, constitute a wake-up call for governments, academia, funders, and WHO to strengthen programmes and enhance research in aedes-transmitted diseases...
December 20, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28006649/serodiagnosis-of-zika-virus-zikv-infections-by-a-novel-ns1-based-elisa-devoid-of-cross-reactivity-with-dengue-virus-antibodies-a-multicohort-study-of-assay-performance-2015-to-2016
#13
Katja Steinhagen, Christian Probst, Christiane Radzimski, Jonas Schmidt-Chanasit, Petra Emmerich, Marjan van Esbroeck, Janke Schinkel, Martin P Grobusch, Abraham Goorhuis, Jens M Warnecke, Erik Lattwein, Lars Komorowski, Andrea Deerberg, Sandra Saschenbrecker, Winfried Stöcker, Wolfgang Schlumberger
Serological diagnosis of Zika virus (ZIKV) infections is challenging due to high cross-reactivity between flaviviruses. We evaluated the diagnostic performance of a novel anti-ZIKV ELISA based on recombinant ZIKV non-structural protein 1 (NS1). Assay sensitivity was examined using sera from 27 patients with reverse transcription (RT)-PCR-confirmed and 85 with suspected ZIKV infection. Specificity was analysed using sera from 1,015 healthy individuals. Samples from 252 patients with dengue virus (n = 93), West Nile virus (n = 34), Japanese encephalitis virus (n = 25), chikungunya virus (n = 19) or Plasmodium spp...
December 15, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28001214/a-biodegradable-device-for-the-controlled-release-of-piper-nigrum-piperaceae-standardized-extract-to-control-aedes-aegypti-diptera-culicidae-larvae
#14
Kauê Muller Custódio, Joice Guilherme de Oliveira, Diego Moterle, Karine Modolon Zepon, Josiane Somariva Prophiro, Luiz Alberto Kanis
INTRODUCTION: The significant increase in dengue, Zika, and chikungunya and the resistance of the Aedes aegypti mosquito to major insecticides emphasize the importance of studying alternatives to control this vector. The aim of this study was to develop a controlled-release device containing Piper nigrum extract and to study its larvicidal activity against Aedes aegypti. METHODS: Piper nigrum extract was produced by maceration, standardized in piperine, and incorporated into cotton threads, which were inserted into hydrogel cylinders manufactured by the extrusion of carrageenan and carob...
November 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/27997935/exotic-mosquito-threats-require-strategic-surveillance-and-response-planning
#15
Cameron E Webb, Stephen L Doggett
Mosquito-borne diseases caused by endemic pathogens such as Ross River, Barmah Forest and Murray Valley encephalitis viruses are an annual concern in New South Wales (NSW), Australia. More than a dozen mosquito species have been implicated in the transmission of these pathogens, with each mosquito occupying a specialised ecological niche that influences their habitat associations, host feeding preferences and the environmental drivers of their abundance. The NSW Arbovirus Surveillance and Mosquito Monitoring Program provides an early warning system for potential outbreaks of mosquito-borne disease by tracking annual activity of these mosquitoes and their associated pathogens...
December 14, 2016: Public Health Research & Practice
https://www.readbyqxmd.com/read/27990003/current-status-of-genome-editing-in-vector-mosquitoes-a-review
#16
Appadurai Daniel Reegan, Stanislaus Antony Ceasar, Michael Gabriel Paulraj, Savarimuthu Ignacimuthu, Naif Abdullah Al-Dhabi
Mosquitoes pose a major threat to human health as they spread many deadly diseases like malaria, dengue, chikungunya, filariasis, Japanese encephalitis and Zika. Identification and use of novel molecular tools are essential to combat the spread of vector borne diseases. Genome editing tools have been used for the precise alterations of the gene of interest for producing the desirable trait in mosquitoes. Deletion of functional genes or insertion of toxic genes in vector mosquitoes will produce either knock-out or knock-in mutants that will check the spread of vector-borne diseases...
December 18, 2016: Bioscience Trends
https://www.readbyqxmd.com/read/27982119/declining-prevalence-of-disease-vectors-under-climate-change
#17
Luis E Escobar, Daniel Romero-Alvarez, Renato Leon, Manuel A Lepe-Lopez, Meggan E Craft, Mercy J Borbor-Cordova, Jens-Christian Svenning
More than half of the world population is at risk of vector-borne diseases including dengue fever, chikungunya, zika, yellow fever, leishmaniasis, chagas disease, and malaria, with highest incidences in tropical regions. In Ecuador, vector-borne diseases are present from coastal and Amazonian regions to the Andes Mountains; however, a detailed characterization of the distribution of their vectors has never been carried out. We estimate the distribution of 14 vectors of the above vector-borne diseases under present-day and future climates...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27974058/effect-of-heavy-equipment-aided-environmental-nebulization-on-aedes-aegypti-vectors-of-dengue-zika-and-chikungunya-in-s%C3%A3-o-paulo-brazil
#18
R Piovezan, J Paulo O Acorinthe, A Visockas, T S de Azevedo, C J Von Zuben
The control of dengue constitutes a great challenge for public health; however, the methods normally used have shown themselves to be insufficient to keep the indices of infestation of Aedes aegypti under control. Recently, beyond the large number of cases and deaths associated with dengue, new risks have arisen such as those represented by chikungunya fever and Zika. In the light of the great significance of these problems within the public health context, two areas in a municipality in the interior of the State of São Paulo, Brazil were selected in 2014...
December 15, 2016: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/27942961/long-lasting-permethrin-impregnated-clothing-protective-efficacy-against-malaria-in-hyperendemic-foci-and-laundering-wearing-and-weathering-effects-on-residual-bioactivity-after-worst-case-use-in-the-rain-forests-of-french-guiana
#19
Bruno Most, Vincent Pommier de Santi, Frédéric Pagès, Marie Mura, Waltraud M Uedelhoven, Michael K Faulde
Personal protective measures against hematophagous vectors constitute the first line of defense against arthropod-borne diseases. However, guidelines for the standardized testing and licensing of insecticide-treated clothing are still lacking. The aim of this study was to analyze the preventive effect of long-lasting polymer-coated permethrin-impregnated clothing (PTBDU) against malaria after exposure to high-level disease transmission sites as well as the corresponding loss of permethrin and bioactivity during worst-case field use...
December 10, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27934884/rapid-affordable-and-portable-medium-throughput-molecular-device-for-zika-virus
#20
Kamfai Chan, Scott C Weaver, Pui-Yan Wong, Sherly Lie, Eryu Wang, Mathilde Guerbois, Siva Praneeth Vayugundla, Season Wong
Zika virus (ZIKV) has gained global attention as an etiologic agent of fetal microcephaly and Guillain-Barré syndrome. Existing immuno-based rapid tests often fail to distinguish between Zika and related flaviviruses that are common in affected regions of Central and South Americas and the Caribbean. The US CDC and qualified state health department laboratories can perform the reverse transcription polymerase chain reaction (RT-PCR) ZIKV test using highly sophisticated instruments with long turnaround times...
December 9, 2016: Scientific Reports
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