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https://www.readbyqxmd.com/read/28424034/clinical-and-laboratory-factors-associated-with-mortality-in-dengue
#1
Atul Saroch, Vivek Arya, Nitin Sinha, R S Taneja, Pooja Sahai, R K Mahajan
Dengue is endemic in more than 100 countries, giving rise to an increased number of deaths in the last five years in the South-East Asian region. We report our findings from a retrospective study of adults admitted with confirmed dengue at our institution. We studied the clinical and laboratory parameters associated with mortality in these patients. Of the 172 hospitalised patients studied, 156 (90.69 %) recovered while 16 (9.3%) died. Univariate analysis showed altered sensorium on presentation, lower haemoglobin and haematocrit levels, higher serum creatinine, higher serum transaminase and lower serum albumin levels to be significantly associated with mortality in dengue...
April 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28424031/yellow-fever-from-angola-and-congo-a-storm-gathers
#2
Qanta A Ahmed, Ziad A Memish
In common with Zika, Chikungunya and Dengue, Yellow Fever (YF) is an arthropod-borne flavivirus. It is transmitted between humans and from monkeys by mosquitoes of the Aedes aegypti (its principal vector), haemogogus and albopictus varieties. Three cycles of transmission may occur: urban; sylvatic; and intermediate. Recently, sub-Saharan Africa has seen the resurgence of this neglected disease. The current YF outbreak in Angola began in December 2015 in the capital Luanda and by October 2016 there had been > 4300 suspected cases, with 376 deaths (case fatality rate = 8...
April 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28422757/cross-reactive-dengue-human-monoclonal-antibody-prevents-severe-pathologies-and-death-from-zika-virus-infections
#3
Yiu-Wing Kam, Cheryl Yi-Pin Lee, Teck-Hui Teo, Shanshan W Howland, Siti Naqiah Amrun, Fok-Moon Lum, Peter See, Nicholas Qing-Rong Kng, Roland G Huber, Mei-Hui Xu, Heng-Liang Tan, Andre Choo, Sebastian Maurer-Stroh, Florent Ginhoux, Katja Fink, Cheng-I Wang, Lisa F P Ng, Laurent Rénia
Zika virus (ZIKV) infections have been linked with neurological complications and congenital Zika syndrome. Given the high level of homology between ZIKV and the related flavivirus dengue virus (DENV), we investigated the level of cross-reactivity with ZIKV using a panel of DENV human mAbs. A majority of the mAbs showed binding to ZIKV virions, with several exhibiting neutralizing capacities against ZIKV in vitro. Three of the best ZIKV-neutralizing mAbs were found to recognize diverse epitopes on the envelope (E) glycoprotein: the highly conserved fusion-loop peptide, a conformation-specific epitope on the E monomer, and a quaternary epitope on the virion surface...
April 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28401256/immune-mediated-cytokine-storm-and-its-role-in-severe-dengue
#4
REVIEW
Anon Srikiatkhachorn, Anuja Mathew, Alan L Rothman
Dengue remains one of the most important mosquito-borne diseases worldwide. Infection with one of the serologically related dengue viruses (DENVs) can lead to a wide range of clinical manifestations and severity. Severe dengue is characterized by plasma leakage and abnormal bleeding that can lead to shock and death. There is currently no specific treatment for severe dengue due to gaps in understanding of the underlying mechanisms. The transient period of vascular leakage is usually followed by a rapid recovery and is suggestive of the effects of short-lived biological mediators...
April 11, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/28380060/cost-effectiveness-of-dengue-vaccination-in-yucat%C3%A3-n-mexico-using-a-dynamic-dengue-transmission-model
#5
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/28358796/yellow-fever-outbreak-kongo-central-province-democratic-republic-of-the-congo-august-2016
#6
John O Otshudiema, Nestor G Ndakala, Elande-Taty K Mawanda, Gaston P Tshapenda, Jacques M Kimfuta, Loupy-Régence N Nsibu, Abdou S Gueye, Jacob Dee, Rossanne M Philen, Coralie Giese, Christopher S Murrill, Ray R Arthur, Benoit I Kebela
On April 23, 2016, the Democratic Republic of the Congo's (DRC's) Ministry of Health declared a yellow fever outbreak. As of May 24, 2016, approximately 90% of suspected yellow fever cases (n = 459) and deaths (45) were reported in a single province, Kongo Central Province, that borders Angola, where a large yellow fever outbreak had begun in December 2015. Two yellow fever mass vaccination campaigns were conducted in Kongo Central Province during May 25-June 7, 2016 and August 17-28, 2016. In June 2016, the DRC Ministry of Health requested assistance from CDC to control the outbreak...
March 31, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28341392/novel-synthesis-of-gold-nanoparticles-using-artemisia-vulgaris-l-leaf-extract-and-their-efficacy-of-larvicidal-activity-against-dengue-fever-vector-aedes-aegypti-l
#7
B Sundararajan, B D Ranjitha Kumari
The Aedes aegypti L. mosquito transmits dengue and yellow fever, which cause millions of death every year. Dengue is a mosquito-borne viral disease that has rapidly spread worldwide particularly in countries with tropical and subtropical climates areas. The present study denotes a simple and eco-friendly biosynthesis of gold nanoparticles using Artemisia vulgaris L. leaf extract as reducing agent. The synthesized gold nanoparticles were characterized by UV-Visible Spectroscopy, X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Dynamic Light Scattering (DLS), Zeta Potential (ZP), Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray Spectroscopy (EDX)...
March 18, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28327810/spatial-temporal-analysis-of-dengue-deaths-identifying-social-vulnerabilities
#8
Maria do Socorro da Silva, Maria Dos Remédios Freitas Carvalho Branco, José Aquino, Rejane Christine de Sousa Queiroz, Emanuele Bani, Emnielle Pinto Borges Moreira, Maria Nilza Lima Medeiros, Zulimar Márita Ribeiro Rodrigues
INTRODUCTION: Currently, dengue fever, chikungunya fever, and zika virus represent serious public health issues in Brazil, despite efforts to control the vector, the Aedes aegypti mosquito. METHODS: This was a descriptive and ecological study of dengue deaths occurring from 2002 to 2013 in São Luis, Maranhão, Brazil. Geoprocessing software was used to draw maps, linking the geo-referenced deaths with urban/social data at census tract level. RESULTS: There were 74 deaths, concentrated in areas of social vulnerability...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28327521/potential-antivirals-natural-products-targeting-replication-enzymes-of-dengue-and-chikungunya-viruses
#9
REVIEW
Ana Flávia Costa da Silveira Oliveira, Róbson Ricardo Teixeira, André Silva de Oliveira, Ana Paula Martins de Souza, Milene Lopes da Silva, Sérgio Oliveira de Paula
Dengue virus (DENV) and chikungunya virus (CHIKV) are reemergent arboviruses that are transmitted by mosquitoes of the Aedes genus. During the last several decades, these viruses have been responsible for millions of cases of infection and thousands of deaths worldwide. Therefore, several investigations were conducted over the past few years to find antiviral compounds for the treatment of DENV and CHIKV infections. One attractive strategy is the screening of compounds that target enzymes involved in the replication of both DENV and CHIKV...
March 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28325921/zika-virus-genome-biology-and-molecular-pathogenesis
#10
REVIEW
Anyou Wang, Stephanie Thurmond, Leonel Islas, Kingyung Hui, Rong Hai
Zika virus (ZIKV) is an emerging RNA virus in the widespread Flavivirus genus. Recently, ZIKV has rapidly spread around the world and has been implicated in human disease, including neurological disorders, triggering public and scientific attention. Understanding how ZIKV causes disease is the highest priority, yet little is known about this virus. Here we examine the currently published data from ZIKV studies to provide the latest understanding of ZIKV genome biology and molecular pathogenesis. The ZIKV genome evolved rapidly from the Flavivirus genus and diverged from the members of this genus, even within the dengue virus cluster to which ZIKV belongs...
March 22, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28303989/frequency-of-worsening-liver-function-in-severe-dengue-hepatitis-patients-receiving-paracetamol-a-retrospective-analysis-of-hospital-data
#11
Ahsan Ali Syed, Faisal Aslam, Haris Hakeem, Faraz Siddiqui, Noreen Nasir
OBJECTIVE: To determine the frequency of worsening liver function among hospital in-patients with severe dengue hepatitis receiving paracetamol. METHODS: This retrospective study was conducted at the Department of Medicine, Aga Khan University Hospital, Karachi, and comprised records of dengue patients with severe hepatitis who received paracetamol for control of fever between June 2007 and December 2014. Alanine aminotransferase at baseline and following paracetamol administration was noted, as well as dosage and duration of paracetamol, along with participants' demographic details...
March 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28283286/prophylactic-platelet-transfusion-plus-supportive-care-versus-supportive-care-alone-in-adults-with-dengue-and-thrombocytopenia-a-multicentre-open-label-randomised-superiority-trial
#12
David C Lye, Sophia Archuleta, Sharifah F Syed-Omar, Jenny G Low, Helen M Oh, Yuan Wei, Dale Fisher, Sasheela S L Ponnampalavanar, Limin Wijaya, Linda K Lee, Eng-Eong Ooi, Adeeba Kamarulzaman, Lucy C Lum, Paul A Tambyah, Yee-Sin Leo
BACKGROUND: Dengue is the commonest vector-borne infection worldwide. It is often associated with thrombocytopenia, and prophylactic platelet transfusion is widely used despite the dearth of robust evidence. We aimed to assess the efficacy and safety of prophylactic platelet transfusion in the prevention of bleeding in adults with dengue and thrombocytopenia. METHODS: We did an open-label, randomised, superiority trial in five hospitals in Singapore and Malaysia...
March 7, 2017: Lancet
https://www.readbyqxmd.com/read/28274279/-preliminary-seroepidemiological-survey-of-dengue-infections-in-pakistan-2009-2014
#13
Muhammad Suleman, Hyeong-Woo Lee, Syed Sohail Zahoor Zaidi, Muhammad Masroor Alam, Nadia Nisar, Uzma Bashir Aamir, Salmaan Sharif, Shahzad Shaukat, Adnan Khurshid, Mehar Angez, Massab Umair, Ghulam Mujtaba, Rani Faryal
BACKGROUND: Dengue virus is the causative agent of dengue fever, a vector borne infection which causes self-limiting to life threatening disease in humans. A sero-epidemiological study was conducted to understand the current epidemiology of dengue virus in Pakistan which is now known as a dengue endemic country after its first reported outbreak in 1994. METHODS: To investigate the prevalence of dengue virus in Pakistan during 2009-2014, a total of 9,493 blood samples were screened for the detection of anti-dengue IgM antibodies using ELISA...
March 9, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28261172/the-complement-system-in-flavivirus-infections
#14
Jonas N Conde, Emiliana M Silva, Angela S Barbosa, Ronaldo Mohana-Borges
The incidence of flavivirus infections has increased dramatically in recent decades in tropical and sub-tropical climates worldwide, affecting hundreds of millions of people each year. The Flaviviridae family includes dengue, West Nile, Zika, Japanese encephalitis, and yellow fever viruses that are typically transmitted by mosquitoes or ticks, and cause a wide range of symptoms, such as fever, shock, meningitis, paralysis, birth defects, and death. The flavivirus genome is composed of a single positive-sense RNA molecule encoding a single viral polyprotein...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28239567/value-of-routine-dengue-diagnosis-in-endemic-countries
#15
REVIEW
James Ayukepi Ayukekbong, Olufunmilayo G Oyero, Samuel Ekpesu Nnukwu, Henry Nzike Mesumbe, Cajetang Nkong Fobisong
Dengue is one of the most common arthropod-borne viral diseases in humans and it is a leading cause of illness and death in the tropical and subtropical regions of the world. It is thought to account for 400 million cases annually among approximately 3.97 billion people at risk of infection in 128 endemic countries. Despite the global prevalence of the disease, the availability of a vaccine is limited in most countries in the endemic areas. Most endemic countries in South America, South East Asia and Africa serve as attractive touristic sites for people from non-endemic countries who become infected and export the virus to dengue-free regions...
February 12, 2017: World Journal of Virology
https://www.readbyqxmd.com/read/28207988/the-role-of-the-unfolded-protein-response-in-dengue-virus-pathogenesis
#16
REVIEW
Nilanka Perera, Joanna L Miller, Nicole Zitzmann
Symptomatic dengue virus (DENV) infections range from mild fever to severe haemorrhagic disease and death. Host-viral interactions play a significant role in deciding the fate of the infection. The unfolded protein response (UPR) is a prosurvival cellular reaction induced in response to DENV-mediated endoplasmic reticulum stress. The UPR has complex interactions with the cellular autophagy machinery, apoptosis, and innate immunity. DENV has evolved to manipulate the UPR to facilitate its replication and to evade host immunity...
February 16, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28205150/the-potential-cost-effectiveness-of-different-dengue-vaccination-programmes-in-malaysia-a-value-based-pricing-assessment-using-dynamic-transmission-mathematical-modelling
#17
Asrul Akmal Shafie, Hui Yee Yeo, Laurent Coudeville, Lucas Steinberg, Balvinder Singh Gill, Rohani Jahis, Amar-Singh Hss
BACKGROUND: Dengue disease poses a great economic burden in Malaysia. METHODS: This study evaluated the cost effectiveness and impact of dengue vaccination in Malaysia from both provider and societal perspectives using a dynamic transmission mathematical model. The model incorporated sensitivity analyses, Malaysia-specific data, evidence from recent phase III studies and pooled efficacy and long-term safety data to refine the estimates from previous published studies...
May 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28188818/jnk1-2-inhibitor-reduces-dengue-virus-induced-liver-injury
#18
Gopinathan Pillai Sreekanth, Aporn Chuncharunee, Boonyarit Cheunsuchon, Sansanee Noisakran, Pa-Thai Yenchitsomanus, Thawornchai Limjindaporn
High viral load with liver injury is exhibited in severe dengue virus (DENV) infection. Mitogen activated protein kinases (MAPKs) including ERK1/2 and p38 MAPK were previously found to be involved in the animal models of DENV-induced liver injury. However, the role of JNK1/2 signaling in DENV-induced liver injury has never been investigated. JNK1/2 inhibitor, SP600125, was used to investigate the role of JNK1/2 signaling in the BALB/c mouse model of DENV-induced liver injury. SP600125-treated DENV-infected mice ameliorated leucopenia, thrombocytopenia, hemoconcentration, liver transaminases and liver histopathology...
February 7, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28152487/a-heparin-functionalized-carbon-nanotube-based-affinity-biosensor-for-dengue-virus
#19
Daniel Wasik, Ashok Mulchandani, Marylynn V Yates
Dengue virus is an arthropod-borne virus transmitted primarily by Aedes mosquitos and is major cause of disease in tropical and subtropical regions. Colloquially known as Dengue Fever, infection can cause hemorrhagic disorders and death in humans and non-human primates. We report a novel electronic biosensor based on a single-walled carbon nanotube network chemiresistive transducer that is functionalized with heparin for low-cost, label-free, ultra-sensitive, and rapid detection of whole dengue virus (DENV)...
May 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28152048/zika-virus-antagonizes-type-i-interferon-responses-during-infection-of-human-dendritic-cells
#20
James R Bowen, Kendra M Quicke, Mohan S Maddur, Justin T O'Neal, Circe E McDonald, Nadia B Fedorova, Vinita Puri, Reed S Shabman, Bali Pulendran, Mehul S Suthar
Zika virus (ZIKV) is an emerging mosquito-borne flavivirus that is causally linked to severe neonatal birth defects, including microcephaly, and is associated with Guillain-Barre syndrome in adults. Dendritic cells (DCs) are an important cell type during infection by multiple mosquito-borne flaviviruses, including dengue virus, West Nile virus, Japanese encephalitis virus, and yellow fever virus. Despite this, the interplay between ZIKV and DCs remains poorly defined. Here, we found human DCs supported productive infection by a contemporary Puerto Rican isolate with considerable variability in viral replication, but not viral binding, between DCs from different donors...
February 2017: PLoS Pathogens
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