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https://www.readbyqxmd.com/read/29660363/comparison-analysis-of-micrornas-in-response-to-dengue-virus-type-2-infection-between-the-vero-cell-adapted-strain-and-its-source-the-clinical-c6-36-isolated-strain
#1
Jiajia Yang, Yao Lin, Liming Jiang, Juemin Xi, Xiaodan Wang, Jiaoqiong Guan, Junying Chen, Yue Pan, Jia Luo, Chao Ye, Qiangming Sun
To elucidate the differences in microRNAs during dengue virus infection between Vero cell-adapted strain (DENV-2-Vero) and its source, the clinical C6/36 isolated strain (DENV-2-C6/36), a comparison analysis was performed in Vero cells by high throughput sequencing. The results showed that the expression of 16 known and 3 novel miRNAs exhibited marked differences. 5 known miRNAs were up-regulated in DENV-2-C6/36 group, while 11 known microRNAs were down-regulated in DENV-2-Vero group. The GO enrichment and KEGG pathway analysis showed that there was a distinct difference in regulating viral replication between two strains...
April 13, 2018: Virus Research
https://www.readbyqxmd.com/read/29625205/a-sex-structured-model-with-birth-pulse-and-release-strategy-for-the-spread-of-wolbachia-in-mosquito-population
#2
Yazhi Li, Xianning Liu
Dengue fever is one of the most important diseases causing illness and death all over the world, which brings tremendous threat to peoples' life and property security, especially in the undeveloped areas. The main vector, Aedes aegypti, must be controlled to prevent the transmission of dengue. There are a variety of methods to control it. Wolbachia is an innovative bacterium which breaks the dengue transmission cycle for its characteristics of cytoplasmic incompatibility and maternal transmission. In this paper, a sex-structured model with birth pulse is established to study the spread of Wolbachia in mosquito population...
April 3, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29588874/clinical-and-laboratory-profile-of-zika-and-dengue-infected-patients-lessons-learned-from-the-co-circulation-of-dengue-zika-and-chikungunya-in-brazil
#3
Elzinandes Leal Azeredo, Flavia Barreto Dos Santos, Luciana Santos Barbosa, Thiara Manuele Alves Souza, Jessica Badolato-Corrêa, Juan Camilo Sánchez-Arcila, Priscila Conrado Guerra Nunes, Luzia Maria de-Oliveira-Pinto, Ana Maria de Filippis, Márcia Dal Fabbro, Izilyanne Hoscher Romanholi, Rivaldo Venancio da Cunha
BACKGROUND: The current triple epidemic caused by dengue, zika and chikungunya constitutes a serious health problem in Brazil. The aim of this study was to investigate acute samples (up to the 7 days of symptoms) from patients presenting acute fever syndrome suspected as arboviral infection and characterize the clinical and laboratorial profile during the co-circulation of dengue, zika and chikungunya in Campo Grande, Mato Grosso do Sul (MS), midwest region of Brazil. METHODS: All suspected cases (n=134) were tested by using serological and molecular diagnostic tests including DENV, ZIKV and CHIKV RT-PCR, Dengue nonstructural protein 1 (NS1) antigen capture ELISA, anti- DENV IgM ELISA and anti-CHIKV IgM ELISA...
February 15, 2018: PLoS Currents
https://www.readbyqxmd.com/read/29582731/vector-borne-disease-is-a-common-cause-of-hospitalized-febrile-illness-in-india
#4
Matthew L Robinson, Dileep Kadam, Sandhya Khadse, Usha Balasubramanian, Priyanka Raichur, Chhaya Valvi, Ivan Marbaniang, Savita Kanade, Jonathan Sachs, Anita Basavaraj, Renu Bharadwaj, Anju Kagal, Vandana Kulkarni, Jonathan Zenilman, George Nelson, Yukari C Manabe, Aarti Kinikar, Amita Gupta, Vidya Mave
Acute febrile illness (AFI) is a major cause of morbidity and mortality in India and other resource-limited settings, yet systematic etiologic characterization of AFI has been limited. We prospectively enrolled adults ( N = 970) and children (age 6 months to 12 years, N = 755) admitted with fever from the community to Sassoon General Hospital in Pune, India, from July 2013 to December 2015. We systematically performed a standardized clinical history, clinical laboratories, and diagnostics. Results from additional testing ordered by treating clinicians were also recorded...
March 26, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29577083/human-antibody-responses-to-emerging-mayaro-virus-and-cocirculating-alphavirus-infections-examined-by-using-structural-proteins-from-nine-new-and-old-world-lineages
#5
Jessica L Smith, Christine L Pugh, Emily D Cisney, Sarah L Keasey, Carolina Guevara, Julia S Ampuero, Guillermo Comach, Doris Gomez, Margarita Ochoa-Diaz, Robert D Hontz, Robert G Ulrich
Mayaro virus (MAYV), Venezuelan equine encephalitis virus (VEEV), and chikungunya virus (CHIKV) are vector-borne alphaviruses that cocirculate in South America. Human infections by these viruses are frequently underdiagnosed or misdiagnosed, especially in areas with high dengue virus endemicity. Disease may progress to debilitating arthralgia (MAYV, CHIKV), encephalitis (VEEV), and death. Few standardized serological assays exist for specific human alphavirus infection detection, and antigen cross-reactivity can be problematic...
March 2018: MSphere
https://www.readbyqxmd.com/read/29564154/severity-and-burden-of-hand-foot-and-mouth-disease-in-asia-a-modelling-study
#6
Wee Ming Koh, Hishamuddin Badaruddin, Hanh La, Mark I-Cheng Chen, Alex R Cook
Background: Hand, foot and mouth disease (HFMD) affects millions of children across Asia annually, leading to an increase in implemented control policies such as surveillance, isolation and social distancing in affected jurisdictions. However, limited knowledge of disease burden and severity causes difficulty in policy optimisation as the associated economic cost cannot be easily estimated. We use a data synthesis approach to provide a comprehensive picture of HFMD disease burden, estimating infection risk, symptomatic rates, the risk of complications and death, and overall disability-adjusted life-year (DALY) losses, along with associated uncertainties...
2018: BMJ Global Health
https://www.readbyqxmd.com/read/29545158/global-dengue-death-before-and-after-the-new-world-health-organization-2009-case-classification-a-systematic-review-and-meta-regression-analysis
#7
Gary Kim-Kuan Low, Simon A Ogston, Mun-Hin Yong, Seng-Chiew Gan, Hui-Yee Chee
BACKGROUND: Since the introduction of 2009 WHO dengue case classification, no literature was found regarding its effect on dengue death. This study was to evaluate the effect of 2009 WHO dengue case classification towards dengue case fatality rate. METHODS: Various databases were used to search relevant articles since 1995. Studies included were cohort and cross-sectional studies, all patients with dengue infection and must report the number of death or case fatality rate...
June 2018: Acta Tropica
https://www.readbyqxmd.com/read/29534694/predicting-the-severity-of-dengue-fever-in-children-on-admission-based-on-clinical-features-and-laboratory-indicators-application-of-classification-tree-analysis
#8
Khansoudaphone Phakhounthong, Pimwadee Chaovalit, Podjanee Jittamala, Stuart D Blacksell, Michael J Carter, Paul Turner, Kheng Chheng, Soeung Sona, Varun Kumar, Nicholas P J Day, Lisa J White, Wirichada Pan-Ngum
BACKGROUND: Dengue fever is a re-emerging viral disease commonly occurring in tropical and subtropical areas. The clinical features and abnormal laboratory test results of dengue infection are similar to those of other febrile illnesses; hence, its accurate and timely diagnosis for providing appropriate treatment is difficult. Delayed diagnosis may be associated with inappropriate treatment and higher risk of death. Early and correct diagnosis can help improve case management and optimise the use of resources such as hospital staff, beds, and intensive care equipment...
March 13, 2018: BMC Pediatrics
https://www.readbyqxmd.com/read/29531658/clinical-and-hematological-profile-of-patients-with-dengue-fever-at-a-tertiary-care-hospital-an-observational-study
#9
Kunal Tewari, Vishal Vishnu Tewari, Ritu Mehta
Background: Dengue is a major health issue with seasonal rise in dengue fever cases imposing an additional burden on hospitals, necessitating bolstering of services in the emergency department, laboratory with creation of additional dengue fever wards. Objectives: To study the clinical and hematological profile of dengue fever cases presenting to a hospital. Methods: Patients with fever and other signs of dengue with either positive NS1 antigen test or IgM or IgG antibody were included...
2018: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/29525973/laser-cut-paper-based-device-for-the-detection-of-dengue-non-structural-ns1-protein-and-specific-igm-in-human-samples
#10
G Theillet, A Rubens, F Foucault, P Dalbon, C Rozand, I Leparc-Goffart, F Bedin
The incidence of flavivirus infections has increased dramatically in recent decades in tropical and sub-tropical areas worldwide, affecting hundreds of millions of people each year. Dengue viruses are typically transmitted by mosquitoes and can cause a wide range of symptoms from flu-like fever to organ impairment and death. Although conventional diagnostic tests can provide early diagnosis of acute dengue infections, access to these tests is often limited in developing countries. Consequently, there is an urgent need to develop affordable, simple, rapid, and robust diagnostic tools that can be used at 'Point of Care' settings...
March 10, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29514900/human-t-lymphocytes-are-permissive-for-dengue-virus-replication
#11
Guilherme F Silveira, Pryscilla F Wowk, Allan H D Cataneo, Paula F Dos Santos, Murilo Delgobo, Marco A Stimamiglio, Maria Lo Sarzi, Ana Paula F S Thomazelli, Ivete Conchon-Costa, Wander R Pavanelli, Lis R V Antonelli, André Báfica, Daniel S Mansur, Claudia N Duarte Dos Santos, Juliano Bordignon
Dengue virus (DV) infection can cause either a self-limiting flu-like disease or a threatening hemorrhage that may evolve to shock and death. A variety of cell types, such as dendritic cells, monocytes and B cells, can be infected by DV. However, despite the role of T lymphocytes in the control of DV replication, there remains a paucity of information on possible DV-T cell interactions during the disease course. In the present study, we have demonstrated that primary human naïve CD4+ and CD8+ T cells are permissive for DV infection...
March 7, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29489994/dengue-in-araraquara-state-of-s%C3%A3-o-paulo-epidemiology-climate-and-aedes-aegypti-infestation
#12
Aline Chimello Ferreira, Francisco Chiaravalloti Neto, Adriano Mondini
OBJECTIVE To describe the epidemiology of dengue in a medium-sized city in the state of São Paulo. METHODS Data, such as circulating serotypes, severe cases and deaths, age group, sex, among others, were obtained on reported and confirmed dengue cases in Araraquara, state of São Paulo, between 1991 and 2015. Climatic and infestation data were also analyzed. These variables were evaluated descriptively, using statistical measures such as frequencies, averages, minimum and maximum. Dengue incidence rates were calculated according to month, year, age and sex, and time series of dengue cases, infestation, and climatic variables...
2018: Revista de Saúde Pública
https://www.readbyqxmd.com/read/29482433/safety-issues-from-a-phase-3-clinical-trial-of-a-live-attenuated-chimeric-yellow-fever-tetravalent-dengue-vaccine
#13
Scott B Halstead
A tetravalent live-attenuated 3-dose vaccine composed of chimeras of yellow fever 17D and the four dengue viruses (CYD, also called Dengvaxia) completed phase 3 clinical testing in over 35,000 children leading to a recommendation that vaccine be administered to >/ = 9 year-olds residing in highly dengue- endemic countries. When clinical trial results were assessed 2 years after the first dose, vaccine efficacy among seropositives was high, but among seronegatives efficacy was marginal. Breakthrough dengue hospitalizations of vaccinated children occurred continuously over a period of 4-5 years post 3rd dose in an age distribution suggesting these children had been vaccinated when seronegative...
February 26, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29471359/philippines-says-anti-dengue-vaccine-may-be-connected-to-three-deaths
#14
(no author information available yet)
No abstract text is available yet for this article.
February 17, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29463757/prospective-forecasts-of-annual-dengue-hemorrhagic-fever-incidence-in-thailand-2010-2014
#15
Stephen A Lauer, Krzysztof Sakrejda, Evan L Ray, Lindsay T Keegan, Qifang Bi, Paphanij Suangtho, Soawapak Hinjoy, Sopon Iamsirithaworn, Suthanun Suthachana, Yongjua Laosiritaworn, Derek A T Cummings, Justin Lessler, Nicholas G Reich
Dengue hemorrhagic fever (DHF), a severe manifestation of dengue viral infection that can cause severe bleeding, organ impairment, and even death, affects between 15,000 and 105,000 people each year in Thailand. While all Thai provinces experience at least one DHF case most years, the distribution of cases shifts regionally from year to year. Accurately forecasting where DHF outbreaks occur before the dengue season could help public health officials prioritize public health activities. We develop statistical models that use biologically plausible covariates, observed by April each year, to forecast the cumulative DHF incidence for the remainder of the year...
February 20, 2018: Proceedings of the National Academy of Sciences of the United States of America
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
#16
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/29443656/highlights-for-dengue-immunopathogenesis-antibody-dependent-enhancement-cytokine-storm-and-beyond
#17
Diogo Kuczera, João Paulo Assolini, Fernanda Tomiotto-Pellissier, Wander Rogério Pavanelli, Guilherme Ferreira Silveira
Infection with dengue virus (DENV) can lead to a wide spectrum of clinical presentations, ranging from asymptomatic infection to death. It is estimated that the disease manifests only in 90 million cases out of the total 390 million yearly infections. Even though research has not yet elucidated which are the precise pathophysiological mechanisms that trigger severe forms of dengue, the infection elicits a critical immune response significant for dengue pathogenesis development. Understanding how the immune response to DENV is established and how it can resolve the infection or turn into an immunopathology is of great importance in DENV research...
February 2018: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/29439121/brain-imaging-in-cases-with-positive-serology-for-dengue-with-neurologic-symptoms-a-clinicoradiologic-correlation
#18
H A Vanjare, P Mannam, A K Mishra, R Karuppusami, R A B Carey, A M Abraham, W Rose, R Iyyadurai, S Mani
BACKGROUND AND PURPOSE: Dengue is a common arboviral disease, which uncommonly involves the brain. There has been a recent surge in dengue cases and dengue-related deaths in tropical countries. The aim of this study was to describe brain imaging findings in patients with dengue infection having neurologic symptoms. MATERIALS AND METHODS: Thirty-five patients with positive serology for dengue with CNS symptoms undergoing imaging of the brain were included in the study...
February 8, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29379207/structural-basis-for-neutralization-of-japanese-encephalitis-virus-by-two-potent-therapeutic-antibodies
#19
Xiaodi Qiu, Yingfeng Lei, Pan Yang, Qiang Gao, Nan Wang, Lei Cao, Shuai Yuan, Xiaofang Huang, Yongqiang Deng, Wenyu Ma, Tianbing Ding, Fanglin Zhang, Xingan Wu, Junjie Hu, Shan-Lu Liu, Chengfeng Qin, Xiangxi Wang, Zhikai Xu, Zihe Rao
Japanese encephalitis virus (JEV), closely related to dengue, Zika, yellow fever and West Nile viruses, remains neglected and not well characterized 1 . JEV is the leading causative agent of encephalitis, and is responsible for thousands of deaths each year in Asia. Humoral immunity is essential for protecting against flavivirus infections and passive immunization has been demonstrated to be effective in curing disease2,3. Here, we demonstrate that JEV-specific monoclonal antibodies, 2F2 and 2H4, block attachment of the virus to its receptor and also prevent fusion of the virus...
January 29, 2018: Nature Microbiology
https://www.readbyqxmd.com/read/29357366/mait-cells-are-activated-in-acute-dengue-virus-infection-and-after-in-vitro-zika-virus-infection
#20
Dominic Paquin-Proulx, Vivian I Avelino-Silva, Bianca A N Santos, Nathália Silveira Barsotti, Fabiana Siroma, Jessica Fernandes Ramos, Adriana Coracini Tonacio, Alice Song, Alvino Maestri, Natalia Barros Cerqueira, Alvina Clara Felix, José Eduardo Levi, Benjamin C Greenspun, Miguel de Mulder Rougvie, Michael G Rosenberg, Douglas F Nixon, Esper G Kallas
Dengue virus (DENV) and Zika virus (ZIKV) are members of the Flaviviridae and are predominantly transmitted via mosquito bites. Both viruses are responsible for a growing number of infections in tropical and subtropical regions. DENV infection can cause lethargy with severe morbidity and dengue shock syndrome leading to death in some cases. ZIKV is now linked with Guillain-Barré syndrome and fetal malformations including microcephaly and developmental disorders (congenital Zika syndrome). The protective and pathogenic roles played by the immune response in these infections is unknown...
January 2018: PLoS Neglected Tropical Diseases
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