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https://www.readbyqxmd.com/read/28448490/the-value-of-daily-platelet-counts-for-predicting-dengue-shock-syndrome-results-from-a-prospective-observational-study-of-2301-vietnamese-children-with-dengue
#1
Phung Khanh Lam, Tran Van Ngoc, Truong Thi Thu Thuy, Nguyen Thi Hong Van, Tran Thi Nhu Thuy, Dong Thi Hoai Tam, Nguyen Minh Dung, Nguyen Thi Hanh Tien, Nguyen Tan Thanh Kieu, Cameron Simmons, Bridget Wills, Marcel Wolbers
BACKGROUND: Dengue is the most important mosquito-borne viral infection to affect humans. Although it usually manifests as a self-limited febrile illness, complications may occur as the fever subsides. A systemic vascular leak syndrome that sometimes progresses to life-threatening hypovolaemic shock is the most serious complication seen in children, typically accompanied by haemoconcentration and thrombocytopenia. Robust evidence on risk factors, especially features present early in the illness course, for progression to dengue shock syndrome (DSS) is lacking...
April 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28442105/towards-development-of-a-universal-dengue-vaccine-how-close-are-we
#2
REVIEW
Ee Leen Pang, Hwei-San Loh
Dengue has been ranked as one of the top emerging diseases in Asia and Latin America. Current epidemiological data may not even reflect the true burden of disease due to under-reported figures. Vector control programmes have failed to contain the disease and worst of all, no specific treatment is available at the moment. Thereby, this pushes the demand for a dengue vaccine as a long-term protective approach. Despite there are numerous vaccine candidates ahead, they could be held back by different aspects in promoting vaccine implementation...
March 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28432975/vaccination-strategies-against-zika-virus
#3
REVIEW
Estefania Fernandez, Michael S Diamond
The epidemic emergence of Zika virus (ZIKV) in 2015-2016 has been associated with congenital malformations and neurological sequela. Current efforts to develop a ZIKV vaccine build on technologies that successfully reduced infection or disease burden against closely related flaviviruses or other RNA viruses. Subunit-based (DNA plasmid and modified mRNA), viral vectored (adeno- and measles viruses) and inactivated viral vaccines are already advancing to clinical trials in humans after successful mouse and non-human primate studies...
April 19, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28403440/case-management-of-dengue-lessons-learned
#4
Siripen Kalayanarooj, Alan L Rothman, Anon Srikiatkhachorn
The global burden of dengue and its geographic distribution have increased over the past several decades. The introduction of dengue in new areas has often been accompanied by high case-fatality rates. Drawing on the experience in managing dengue cases at the Queen Sirikit National Institute of Child Health in Bangkok, Thailand, this article provides the authors' perspectives on key clinical lessons to improve dengue-related outcomes. Parallels between this clinical experience and outcomes reported in randomized controlled trials, results of efforts to disseminate practice recommendations, and suggestions for areas for further research are also discussed...
March 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28403438/current-status-of-dengue-therapeutics-research-and-development
#5
REVIEW
Jenny G H Low, Eng Eong Ooi, Subhash G Vasudevan
Dengue is a significant global health problem. Even though a vaccine against dengue is now available, which is a notable achievement, its long-term protective efficacy against each of the 4 dengue virus serotypes remains to be definitively determined. Consequently, drugs directed at the viral targets or critical host mechanisms that can be used safely as prophylaxis or treatment to effectively ameliorate disease or reduce disease severity and fatalities are still needed to reduce the burden of dengue. This review will provide a brief account of the status of therapeutics research and development for dengue...
March 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28401481/why-is-aedes-aegypti-linnaeus-so-successful-as-a-species
#6
REVIEW
F D Carvalho, L A Moreira
Diseases transmitted by mosquitoes impose enormous burden towards human morbidity and mortality. Over the last three decades, Brazil has suffered from severe Dengue epidemics. In September 2014, this situation is further complicated by the introduction of two other viruses, Zika and Chikungunya, placing Brazil in a triple epidemic. In this article, we discuss the biology of Aedes aegypti Linnaeus, and the principal initiatives currently used to control mosquito populations and the diseases they transmit. Aedes aegypti has broad global distribution and is involved in the transmission of various arboviral diseases such as Dengue, Zika, and Chikungunya...
April 11, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28396423/el-ni%C3%A3-o-and-the-shifting-geography-of-cholera-in-africa
#7
Sean M Moore, Andrew S Azman, Benjamin F Zaitchik, Eric D Mintz, Joan Brunkard, Dominique Legros, Alexandra Hill, Heather McKay, Francisco J Luquero, David Olson, Justin Lessler
The El Niño Southern Oscillation (ENSO) and other climate patterns can have profound impacts on the occurrence of infectious diseases ranging from dengue to cholera. In Africa, El Niño conditions are associated with increased rainfall in East Africa and decreased rainfall in southern Africa, West Africa, and parts of the Sahel. Because of the key role of water supplies in cholera transmission, a relationship between El Niño events and cholera incidence is highly plausible, and previous research has shown a link between ENSO patterns and cholera in Bangladesh...
April 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28393598/-zika-virus-infection-in-pregnancy
#8
Gabriella Varjasi, Róbert Póka
The Zika virus is a flavivirus spread by mosquitoes. Its primary vectors are the Aedes aegypti and the Aedes albopictus. Before 2007 it sporadically caused benign morbidity. Since 2015, it started spreading "explosively" in America, especially in Brazil. In August 2016 they reported cases from New York and Poland, too. Most of the infections don't produce any symptoms, but can cause grave complications. The most important lesion is microcephalia that forms in fetuses. Microcephalia's most serious consequence is mental retardation, which puts great burden on both the family and the society...
April 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28392806/epidemiological-characteristics-of-dengue-disease-in-latin-america-and-in-the-caribbean-a-systematic-review-of-the-literature
#9
REVIEW
Jaime Rafael Torres, Tomás Agustín Orduna, Maricela Piña-Pozas, Daniela Vázquez-Vega, Elsa Sarti
Dengue, an important mosquito-borne virus transmitted mainly by Aedes aegypti, is a major public health issue in Latin America and the Caribbean. National epidemiological surveillance systems, usually based on passive detection of symptomatic cases, while underestimating the true burden of dengue disease, can provide valuable insight into disease trends and excess reporting and potential outbreaks. We carried out a systematic review of the literature to characterize the recent epidemiology of dengue disease in Latin America and the English-speaking and Hispanic Caribbean Islands...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28380060/cost-effectiveness-of-dengue-vaccination-in-yucat%C3%A3-n-mexico-using-a-dynamic-dengue-transmission-model
#10
Eunha Shim
BACKGROUND: The incidence of dengue fever (DF) is steadily increasing in Mexico, burdening health systems with consequent morbidities and mortalities. On December 9th, 2015, Mexico became the first country for which the dengue vaccine was approved for use. In anticipation of a vaccine rollout, analysis of the cost-effectiveness of the dengue vaccination program that quantifies the dynamics of disease transmission is essential. METHODS: We developed a dynamic transmission model of dengue in Yucatán, Mexico and its proposed vaccination program to incorporate herd immunity into our analysis of cost-effectiveness analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28333935/dengue-seroprevalence-seroconversion-and-risk-factors-in-dhaka-bangladesh
#11
Parnali Dhar-Chowdhury, Kishor Kumar Paul, C Emdad Haque, Shakhawat Hossain, L Robbin Lindsay, Antonia Dibernardo, W Abdullah Brooks, Michael A Drebot
BACKGROUND: Dengue virus (DENV) activity has been reported in Dhaka, Bangladesh since the early 1960s with the greatest burden of dengue fever and dengue hemorrhagic fever cases observed in 2000. Since this time, the intensity of dengue activity has varied from year to year, and its determining factors remained relatively unknown. In light of such gaps in knowledge, the main objectives of this study were to determine the magnitude of seroprevalence and seroconversion among the surveyed population, and establish the individual/household level risk factors for the presence of DENV antibodies among all age groups of target populations in the city of Dhaka...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28332822/screening-of-wolbachia-endosymbiont-infection-in-aedes-aegypti-mosquitoes-using-attenuated-total-reflection-mid-infrared-spectroscopy
#12
Aazam Khoshmanesh, Dale Christensen, David Perez-Guaita, Iñaki Iturbe-Ormaetxe, Scott L O'Neill, Don McNaughton, Bayden R Wood
Dengue fever is the most common mosquito transmitted viral infection afflicting humans, estimated to generate around 390 million infections each year in over 100 countries. The introduction of the endosymbiotic bacterium Wolbachia into Aedes aegypti mosquitoes has the potential to greatly reduce the public health burden of the disease. This approach requires extensive PCR (Polymerase Chain Reaction) testing of the Wolbachia-infection status of mosquitoes in areas where Wolbachia-A. aegypti are released. Here we report the first example of small organism mid-infrared spectroscopy where we have applied Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) spectroscopy and multivariate modelling methods to determine sex, age and the presence of Wolbachia (wMel strain) in laboratory mosquitoes and sex and age in field mosquitoes...
March 23, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28320741/hypoxia-enhances-antibody-dependent-dengue-virus-infection
#13
Esther Shuyi Gan, Wei Fun Cheong, Kuan Rong Chan, Eugenia Ziying Ong, Xiaoran Chai, Hwee Cheng Tan, Sujoy Ghosh, Markus R Wenk, Eng Eong Ooi
Dengue virus (DENV) has been found to replicate in lymphoid organs such as the lymph nodes, spleen, and liver in post-mortem analysis. These organs are known to have low oxygen levels (~0.5-4.5% O2) due to the vascular anatomy. However, how physiologically low levels of oxygen affect DENV infection via hypoxia-induced changes in the immune response remains unknown. Here, we show that monocytes adapted to 3% O2 show greater susceptibility to antibody-dependent enhancement of DENV infection. Low oxygen level induces HIF1α-dependent upregulation of fragment crystallizable gamma receptor IIA (FcγRIIA) as well as HIF1α-independent alterations in membrane ether lipid concentrations...
March 20, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28320174/etiological-agents-of-viral-meningitis-in-children-from-a-dengue-endemic-area-southeast-region-of-brazil
#14
Danilo B de Oliveira, Talitah M Candiani, Ana Paula M Franco-Luiz, Gabriel M F Almeida, Jônatas S Abrahão, Maria Rios, Roney S Coimbra, Erna G Kroon
Meningitis is a disease with a global distribution that constitutes a worldwide burden, with viruses as the primary etiologic agents. The range of viral meningitis severity depends mainly on age, immune status and etiological agent. The aim of this work was to investigate the suspected cases of viral meningitis using molecular techniques to confirm the viral infection. The diagnosed virus was correlated with clinical findings and cytochemical parameters in cerebrospinal liquid (CSF) of patients. CSF of 70 children with the presumptive diagnosis of viral meningitis was analyzed by real time PCR (qPCR)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28280265/effect-of-blood-type-on-anti-%C3%AE-gal-immunity-and-the-incidence-of-infectious-diseases
#15
Alejandro Cabezas-Cruz, Lourdes Mateos-Hernández, Pilar Alberdi, Margarita Villar, Gilles Riveau, Emmanuel Hermann, Anne-Marie Schacht, Jamal Khalife, Margarida Correia-Neves, Christian Gortazar, José de la Fuente
The identification of factors affecting the susceptibility to infectious diseases is essential toward reducing their burden on the human population. The ABO blood type correlates with susceptibility to malaria and other infectious diseases. Due to the structural similarity between blood antigen B and Galα1-3Galβ1-(3)4GlcNAc-R (α-Gal), we hypothesized that self-tolerance to antigen B affects the immune response to α-Gal, which in turn affects the susceptibility to infectious diseases caused by pathogens carrying α-Gal on their surface...
March 10, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28280063/surveillance-report-of-zika-virus-among-canadian-travellers-returning-from-the-americas
#16
Andrea K Boggild, Jennifer Geduld, Michael Libman, Cedric P Yansouni, Anne E McCarthy, Jan Hajek, Wayne Ghesquiere, Yazdan Mirzanejad, Jean Vincelette, Susan Kuhn, Pierre J Plourde, Sumontra Chakrabarti, David O Freedman, Kevin C Kain
BACKGROUND: Widespread transmission of Zika virus in the Americas has occurred since late 2015. We examined demographic and travel-related characteristics of returned Canadian travellers with Zika infection acquired in the Americas to illuminate risk factors for acquisition and the clinical spectrum. METHODS: We analyzed demographic and travel-related data for returned Canadian travellers who presented to a CanTravNet site between October 2015 and September 2016 for care of Zika virus acquired in the Americas...
March 6, 2017: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
https://www.readbyqxmd.com/read/28278416/arboviral-diseases-and-malaria-in-australia-2013-14-annual-report-of-the-national-arbovirus-and-malaria-advisory-committee
#17
Katrina E Knope, Mike Muller, Nina Kurucz, Stephen L Doggett, Rebecca Feldman, Cheryl A Johansen, Michaela Hobby, Sonya Bennett, Stacey Lynch, Angus Sly, Bart J Currie
This report describes the epidemiology of mosquito-borne diseases of public health importance in Australia during the 2013-14 season (1 July 2013 to 30 June 2014) and includes data from human notifications, sentinel chicken, vector and virus surveillance programs. The National Notifiable Diseases Surveillance System received notifications for 8,898 cases of disease transmitted by mosquitoes during the 2013-14 season. The Australasian alphaviruses Barmah Forest virus and Ross River virus accounted for 6,372 (72%) total notifications...
September 30, 2016: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/28278157/societal-impact-of-dengue-outbreaks-stakeholder-perceptions-and-related-implications-a-qualitative-study-in-brazil-2015
#18
Joël Ladner, Mariana Rodrigues, Ben Davis, Marie-Hélène Besson, Etienne Audureau, Joseph Saba
BACKGROUND: The growing burden of dengue in many countries worldwide and the difficulty of preventing outbreaks have increased the urgency to identify alternative public health management strategies and effective approaches to control and prevent dengue outbreaks. The objectives of this study were to understand the impact of dengue outbreak on different stakeholders in Brazil, to explore their perceptions of approaches used by governmental authorities to control and prevent dengue outbreaks and to define the challenges and implications of preventing future outbreaks...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28270154/pandemics-pathogenicity-and-changing-molecular-epidemiology-of-cholera-in-the-era-of-global-warming
#19
REVIEW
Fazle Rabbi Chowdhury, Zannatun Nur, Nazia Hassan, Lorenz von Seidlein, Susanna Dunachie
BACKGROUND: Vibrio cholerae, a Gram-negative, non-spore forming curved rod is found in diverse aquatic ecosystems around the planet. It is classified according to its major surface antigen into around 206 serogroups, of which O1 and O139 cause epidemic cholera. A recent spatial modelling technique estimated that around 2.86 million cholera cases occur globally every year, and of them approximately 95,000 die. About 1.3 billion people are currently at risk of infection from cholera. Meta-analysis and mathematical modelling have demonstrated that due to global warming the burden of vector-borne diseases like malaria, leishmaniasis, meningococcal meningitis, viral encephalitis, dengue and chikungunya will increase in the coming years in the tropics and beyond...
March 7, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28250620/clinical-score-to-differentiate-scrub-typhus-and-dengue-a-tool-to-differentiate-scrub-typhus-and-dengue
#20
Shubhanker Mitra, Ira Gautam, Mohan Jambugulam, Kundavaram Paul Prabhakar Abhilash, Vishalakshi Jayaseeelan
BACKGROUND: Dengue and scrub typhus share similar clinical and epidemiological features, and are difficult to differentiate at initial presentation. Many places are endemic to both these infections where they comprise the majority of acute undifferentiated febrile illnesses. MATERIALS AND METHODS: We aimed to develop a score that can differentiate scrub typhus from dengue. In this cross-sectional study, 188 cases of scrub typhus and 201 cases of dengue infection who presented to the emergency department or medicine outpatient clinic from September 2012 to April 2013 were included...
January 2017: Journal of Global Infectious Diseases
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