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https://www.readbyqxmd.com/read/29470620/dengue-viruses-and-promising-envelope-protein-domain-iii-based-vaccines
#1
REVIEW
Hossein Fahimi, Mahshid Mohammadipour, Hamed Haddad Kashani, Farshid Parvini, Majid Sadeghizadeh
Dengue viruses are emerging mosquito-borne pathogens belonging to Flaviviridae family which are transmitted to humans via the bites of infected mosquitoes Aedes aegypti and Aedes albopictus. Because of the wide distribution of these mosquito vectors, more than 2.5 billion people are approximately at risk of dengue infection. Dengue viruses cause dengue fever and severe life-threatening illnesses as well as dengue hemorrhagic fever and dengue shock syndrome. All four serotypes of dengue virus can cause dengue diseases, but the manifestations are nearly different depending on type of the virus in consequent infections...
February 22, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29470509/co-circulation-of-all-the-four-dengue-virus-serotypes-and-detection-of-a-novel-clade-of-denv-4-genotype-i-virus-in-pune-india-during-2016-season
#2
Shubham Shrivastava, Divya Tiraki, Arundhati Diwan, Sanjay K Lalwani, Meera Modak, Akhilesh Chandra Mishra, Vidya A Arankalle
Dengue is the most common mosquito-borne viral infection in tropical and sub-tropical countries. In recent years, India has reported increased incidences of concurrent infection with multiple serotypes of dengue viruses (DENV). In the present study, we have characterized DENV circulating during a single season of 2016 in Pune, India. A total of 64 serum samples from NS1 ELISA positive dengue patients were used for PCR amplification of CprM region of the viral genome and sequencing. Phylogenetic analysis documented circulation of all the four DENV serotypes with predominance of DENV-2 (40...
2018: PloS One
https://www.readbyqxmd.com/read/29470500/glutathionylation-of-dengue-and-zika-ns5-proteins-affects-guanylyltransferase-and-rna-dependent-rna-polymerase-activities
#3
Chonticha Saisawang, Atichat Kuadkitkan, Prasert Auewarakul, Duncan R Smith, Albert J Ketterman
It has been estimated for dengue infection that the global population at risk is 3.5 billion people, which makes dengue an important public health problem. The causative agents of dengue are dengue viruses. For dengue virus replication, the dengue virus NS5 protein is of special importance as it has several enzyme activities important for viral replication. Previous reports of phosphorylation and SUMOylation of dengue NS5 have shown these protein modifications have important consequences for NS5 functions. In this report we identify glutathionylation, another reversible post translation modification that impacts on NS5 enzyme activity...
2018: PloS One
https://www.readbyqxmd.com/read/29467430/evaluation-of-macaca-radiata-as-a-non-human-primate-model-of-dengue-virus-infection
#4
Fumihiro Kato, Yuki Ishida, Akihiko Kawakami, Tomohiko Takasaki, Masayuki Saijo, Tomoyuki Miura, Takayuki Hishiki
Dengue virus (DENV) causes a wide range of illnesses in humans, including dengue fever and dengue haemorrhagic fever. Current animal models of DENV infection are limited for understanding infectious diseases in humans. Bonnet monkeys (Macaca radiata), a type of Old World monkey, have been used to study experimental and natural infections by flaviviruses, but Old World monkeys have not yet been used as DENV infection models. In this study, the replication levels of several DENV strains were evaluated using peripheral blood mononuclear cells...
February 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29466521/prolonged-zika-virus-viremia-in-a-patient-with-guillain-barr%C3%A3-syndrome-in-trinidad-and-tobago
#5
Gabriel Gonzalez-Escobar, Anne Marie Valadere, Rosmond Adams, Karen Polson-Edwards, Avery Q J Hinds, Akenath Misir, C James Hospedales
An emerging mosquito-borne flavivirus, Zika virus (ZIKV) is a significant public health concern because of the syndromes associated with the infection. In addition, ZIKV is considered a major problem due to large-scale spread of the disease and the possible clinical complications for the central nervous system, especially Guillain-Barré syndrome (GBS) and microcephaly. Since the introduction of ZIKV in the Caribbean, molecular detection of the viral RNA has been utilized as a more specific and sensitive approach to demonstrating acute infection...
February 19, 2018: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/29466517/potential-occurrence-of-zika-from-subtropical-to-temperate-argentina-considering-the-basic-reproduction-number-r0
#6
Pablo Orellano, Darío Vezzani, Nancy Quaranta, Rodolfo Cionco, Julieta Reynoso, Oscar Salomon
OBJECTIVE: To assess the potential occurrence of Zika transmission throughout Argentina by the mosquito Aedes aegypti considering the basic reproduction number (R0). METHODS: A model originally developed for dengue was adapted for Zika. R0 was estimated as a function of seven parameters, three of them were considered temperature-dependent. Seasonal Zika occurrence was evaluated in 9 locations representing different climatic suitability for the vector. Data of diary temperatures were extracted and included in the model...
February 19, 2018: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/29463410/alterations-of-mitochondrial-electron-transport-chain-and-oxidative-stress-induced-by-alkaloid-like-%C3%AE-aminonitriles-on-aedes-aegypti-larvae
#7
Mayra A Borrero Landazabal, Aurora L Carreño Otero, Vladimir V Kouznetsov, Jonny E Duque Luna, Stelia C Mendez-Sanchez
Aedes aegypti mosquitoes are responsible for dengue, chikungunya, and Zika virus transmission in tropical and subtropical areas around the world. Due to the absence of vaccines or antiviral drugs for human treatment, the majority of control strategies are targeted at Ae. aegypti elimination. Our research on mosquito control insecticidal agents has previously shown that the alkaloid girgensohnine and its analogues (α-aminonitriles) present in vitro acetylcholinesterase inhibition and in vivo insecticidal activity against Ae...
January 2018: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29462598/using-adult-aedes-aegypti-females-to-predict-areas-at-risk-for-dengue-transmission-a-spatial-case-control-study
#8
Maisa Carla Pereira Parra, Eliane Aparecida Fávaro, Margareth Regina Dibo, Adriano Mondini, Álvaro Eduardo Eiras, Erna Geessien Kroon, Mauro Martins Teixeira, Mauricio Lacerda Nogueira, Francisco Chiaravalloti-Neto
INTRODUCTION: Traditional indices for measuring dengue fever risk in a given area are based on the immature forms of the vector (larvae and pupae surveys). However, this is inefficient because only adult female mosquitoes actually transmit the virus. Based on these assumptions, our objective was to evaluate the association between an entomological index obtained from adult mosquito traps and the occurrence of dengue in a hyperendemic area. Additionally, we compared its cost to that of the Breteau Index (BI)...
February 17, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29462424/seasonal-distribution-and-container-preference-ratio-of-the-dengue-fever-vector-aedes-aegypti-diptera-culicidae-in-rawalpindi-pakistan
#9
Muhammad Uzair Mukhtar, Qian Han, Chenhong Liao, Fatima Haq, Ali Arslan, Adil Bhatti
Aedes aegypti (L.) and Aedes albopictus (Skuse) are known vectors of dengue, chikungunya, and other pathogens; however, their ecology and role in virus transmission has not been well studied in Pakistan. Here, we report on an intensive survey of potential breeding sites of Ae. aegypti in Rawalpindi, Punjab Province, Pakistan. The study continued for 11 mo and was divided into three seasons: January to June (pre-monsoon), July to September (monsoon), and October-November (post-monsoon). Larval mosquitoes were collected from all wet containers present in and around the houses...
February 15, 2018: Journal of Medical Entomology
https://www.readbyqxmd.com/read/29462169/characteristics-and-predictors-for-gastrointestinal-hemorrhage-among-adult-patients-with-dengue-virus-infection-emphasizing-the-impact-of-existing-comorbid-disease-s
#10
Wen-Chi Huang, Ing-Kit Lee, Yi-Chun Chen, Ching-Yen Tsai, Jien-Wei Liu
BACKGROUND: Gastrointestinal (GI) bleeding is a leading cause of death in dengue. This study aims to identify predictors for GI bleeding in adult dengue patients, emphasizing the impact of existing comorbid disease(s). METHODS: Of 1300 adults with dengue virus infection, 175 (mean age, 56.5±13.7 years) patients with GI bleeding and 1,125 (mean age, 49.2±15.6 years) without GI bleeding (controls) were retrospectively analyzed. RESULTS: Among 175 patients with GI bleeding, dengue hemorrhagic fever was found in 119 (68%) patients; the median duration from onset dengue illness to GI bleeding was 5 days...
2018: PloS One
https://www.readbyqxmd.com/read/29460860/aetiology-of-acute-encephalitis-syndrome-in-uttar-pradesh-india-from-2014-to-2016
#11
Parul Jain, Shantanu Prakash, Danish N Khan, Ravindra Kumar Garg, Rashmi Kumar, Amit Bhagat, V Ramakrishna, Amita Jain
Background & objectives: It is imperative to know the aetiology of acute encephalitis syndrome (AES) for patient management and policy making. The present study was carried out to determine the prevalence of common aetiological agents of AES in Uttar Pradesh (UP) state of India. Methods: Serum and/or CSF samples were collected from AES patients admitted at Gandhi Memorial and Associated Hospital, King George's Medical University, Lucknow, a tertiary care centre, UP during 2014-16...
October 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29460859/improving-vector-borne-pathogen-surveillance-a-laboratory-based-study-exploring-the-potential-to-detect-dengue-virus-and-malaria-parasites-in-mosquito-saliva
#12
Vanessa R Melanson, Ryan Jochim, Michael Yarnell, Karen Bingham Ferlez, Soumya Shashikumar, Jason H Richardson
Background & objectives: Vector-borne pathogen surveillance programmes typically rely on the collection of large numbers of potential vectors followed by screening protocols focused on detecting pathogens in the arthropods. These processes are laborious, time consuming, expensive, and require screening of large numbers of samples. To streamline the surveillance process, increase sample throughput, and improve cost-effectiveness, a method to detect dengue virus and malaria parasites (Plasmodium falciparum) by leveraging the sugar-feeding behaviour of mosquitoes and their habit of expectorating infectious agents in their saliva during feeding was investigated in this study...
October 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29460858/-aedes-vittatus-bigot-mosquito-an-emerging-threat-to-public-health
#13
REVIEW
A B Sudeep, P Shil
Aedes vittatus (Bigot) mosquito is a voracious biter of humans and has a geographical distribution throughout tropical Asia, Africa and the Mediterranean region of Europe. It is predominantly a rock-hole breeder, though it can breed in diverse macro- and micro-habitats. The mosquito plays an important role in the maintenance and transmission of yellow fever (YFV), dengue (DENV), chikungunya (CHIKV) and Zika (ZIKV) viruses. It has been implicated as an important vector of YFV in several African countries as evidenced by repeated virus isolations from the mosquito and its potential to transmit the virus experimentally...
October 2017: Journal of Vector Borne Diseases
https://www.readbyqxmd.com/read/29460745/seroprevalence-of-dengue-and-chikungunya-virus-antibodies-french-polynesia-2014-2015
#14
Maite Aubry, Anita Teissier, Michael Huart, Sébastien Merceron, Jessica Vanhomwegen, Mihiau Mapotoeke, Teheipuaura Mariteragi-Helle, Claudine Roche, Anne-Laure Vial, Sylvianne Teururai, Sébastien Sicard, Sylvie Paulous, Philippe Desprès, Jean-Claude Manuguerra, Henri-Pierre Mallet, Allison Imrie, Didier Musso, Xavier Deparis, Van-Mai Cao-Lormeau
We investigated dengue and chikungunya virus antibody seroprevalence in French Polynesia during 2014-2015. Dengue virus seroprevalence was ≈60% among schoolchildren and >83% among the general population; chikungunya virus seroprevalence was <3% before and 76% after Zika virus emergence (2013). Dengue virus herd immunity may affect Zika virus infection and pathogenesis.
March 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29460714/seroprevalence-of-dengue-antibodies-in-three-urban-settings-in-yucatan-mexico
#15
Norma Pavía-Ruz, Diana Patricia Rojas, Salja Villanueva, Pilar Granja, Angel Balam-May, Ira M Longini, M Elizabeth Halloran, Pablo Manrique, Hector Gómez-Dantés
Dengue transmission in Mexico has become a major public health problem. Few epidemiological studies have examined the seroprevalence of dengue in Mexico, and recent estimates are needed to better understand dengue transmission dynamics. We conducted a dengue seroprevalence survey among 1,668 individuals including all age groups in three urban settings in Yucatan, Mexico. Children (< 19 years old) were selected randomly from schools. The adults (≥ 19 years old) were selected from healthcare facilities. Participants were asked to provide a venous blood sample and to answer a brief questionnaire with demographic information...
February 19, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29458406/assessing-dengue-transmission-risk-and-a-vector-control-intervention-using-entomological-and-immunological-indices-in-thailand-study-protocol-for-a-cluster-randomized-controlled-trial
#16
Hans J Overgaard, Chamsai Pientong, Kesorn Thaewnongiew, Michael J Bangs, Tipaya Ekalaksananan, Sirinart Aromseree, Thipruethai Phanitchat, Supranee Phanthanawiboon, Benedicte Fustec, Vincent Corbel, Dominique Cerqueira, Neal Alexander
BACKGROUND: Dengue fever is the most common and widespread mosquito-borne arboviral disease in the world. There is a compelling need for cost-effective approaches and practical tools that can reliably measure real-time dengue transmission dynamics that enable more accurate and useful predictions of incidence and outbreaks. Sensitive surveillance tools do not exist today, and only a small handful of new control strategies are available. Vector control remains at the forefront for combating dengue transmission...
February 20, 2018: Trials
https://www.readbyqxmd.com/read/29454740/a-rapid-point-of-care-test-for-dengue-virus-1-based-on-a-lateral-flow-assay-with-a-near-infrared-fluorescent-dye
#17
Lin Chen, Huagui Wang, Tongsheng Guo, Chaohui Xiao, Licheng Liu, Xiaoguang Zhang, Bo Liu, Peiran Li, Aixia Liu, Bo Li, Boan Li, Yuanli Mao
Dengue fever is caused by the dengue virus (DENV), and DENV1 is the prevalent epidemic serotype in south China. A new lateral flow assay (LFA) based on a near-infrared (NIR) fluorescent dye was developed to detect anti-DENV1 IgG antibodies. DyLight-800 was used as the marker conjugated to goat anti-human IgG antibodies, and recombinant dengue type 1 envelope protein was used as the capture protein on the test line. Twenty samples from patients infected with DENV1 and 160 negative controls were analyzed using this new NIR-LFA...
February 15, 2018: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29454707/crystal-structure-of-the-capsid-protein-from-zika-virus
#18
Zifang Shang, Hao Song, Yi Shi, Jianxun Qi, George F Gao
Recently, Zika virus (ZIKV) emerged as a global public health concern, and is distinct from other flaviviruses in many aspects, e.g., causing transplacental infection, fetal abnormalities and vector-independent transmission through body fluids in humans. The capsid (C) protein is a multifunctional protein, since it binds to viral RNA in the process of nucleocapsid assembly and plays important roles in virus infection processes by interacting with cellular proteins, modulating cellular metabolism, apoptosis and immune response...
February 15, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29453089/botanical-essential-oils-and-uses-as-mosquitocides-and-repellents-against-dengue
#19
REVIEW
Muthiah Chellappandian, Prabhakaran Vasantha-Srinivasan, Sengottayan Senthil-Nathan, Sengodan Karthi, Annamalai Thanigaivel, Athirstam Ponsankar, Kandaswamy Kalaivani, Wayne B Hunter
Plants naturally produce bioactive compounds along with many secondary metabolites which serve as defensive chemical against herbivorers including insect pests. One group of these phytochemicals are the 'Essential Oils' (EO's), which possess an extensive range of biological activity especially insecticidal and insect repellents. This review provides a comprehensive viewpoint on potential modes of action of biosafety plant derived Essential Oils (EO's) along with their principal chemical derivatives against larvae and adult mosquito vectors of dengue virus...
February 13, 2018: Environment International
https://www.readbyqxmd.com/read/29452594/comparative-immunogenicity-of-preparations-of-yeast-derived-dengue-oral-vaccine-candidate
#20
Jyotiranjan Bal, Nguyen Ngoc Luong, Jisang Park, Ki-Duk Song, Yong-Suk Jang, Dae-Hyuk Kim
BACKGROUND: Dengue is listed as a neglected tropical disease by the Center for Disease Control and Preservation, as there are insufficient integrated surveillance strategies, no effective treatment, and limited licensed vaccines. Consisting of four genetically distinct serotypes, dengue virus (DENV) causes serious life-threatening infections due to its complexity. Antibody-dependent enhancement by pre-existing cross-reactive as well as homotypic antibodies further worsens the clinical symptoms of dengue...
February 16, 2018: Microbial Cell Factories
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