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Dengue NS1

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https://www.readbyqxmd.com/read/28094237/a-multiplex-microsphere-immunoassay-for-zika-virus-diagnosis
#1
Susan J Wong, Andrea Furuya, Jing Zou, Xuping Xie, Alan P Dupuis, Laura D Kramer, Pei-Yong Shi
Rapid and accurate diagnosis of infectious agents is essential for patient care, disease control, and countermeasure development. The present serologic diagnosis of Zika virus (ZIKV) infection relies mainly on IgM-capture ELISA which is confounded with the flaw of cross-reactivity among different flaviviruses. In this communication, we report a multiplex microsphere immunoassay (MIA) that captures the diagnostic power of viral envelope protein (that elicits robust, yet cross-reactive antibodies to other flaviviruses) and the differential power of viral nonstructural proteins NS1 and NS5 (that induce more virus-type specific antibodies)...
January 10, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28093537/dengue-epidemic-in-postconflict-swat-district-khyber-pakhtunkhwa-pakistan-2013
#2
Mamoona Chaudhry, Saeed Ahmad, Hamad Bin Rashid, Iftikhar Ud Din
Swat, a lush green valley of 1.3 million persons, remained under militant insurgency from 2007 to 2009, which damaged the health infrastructure. An outbreak of dengue fever (DF) was declared in the valley in 2013. To investigate this outbreak, we established active surveillance of national hospitals and private clinics, reviewed available clinical and laboratory records, and conducted entomological survey. From August to November 2013, 16,000 suspected patients with acute febrile illness were presented to health facilities...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28062078/-coexistence-of-acute-appendicitis-and-dengue-fever-a-case-report
#3
Juan Fidel Osuna-Ramos, Carlos Silva-Gracia, Gerardo Joel Maya-Vacio, Alejandra Romero-Utrilla, Efrén Rafael Ríos-Burgueño, Jesús Salvador Velarde-Félix
BACKGROUND: Dengue is the most important human viral disease transmitted by mosquitoes. It can be asymptomatic or it can present in any of its 3clinical forms: Dengue fever, dengue haemorrhagic fever and dengue shock syndrome. However, some atypical manifestations have been reported in surgical emergencies caused by acute appendicitis in patients with dengue fever. CLINICAL CASE: We report the case of an 18-year-old Mexican male who presented to the emergency department of the General Hospital of Culiacan, Sinaloa, with symptoms of dengue fever, accompanied by crampy abdominal pain with positive Rovsing and Dunphy signs...
January 3, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28060934/a-cohort-study-of-adult-patients-with-severe-dengue-in-taiwanese-intensive-care-units-the-elderly-and-aptt-prolongation-matter-for-prognosis
#4
Chih-Cheng Hsieh, Cong-Tat Cia, Jen-Chieh Lee, Junne-Ming Sung, Nan-Yao Lee, Po-Lin Chen, Te-Hui Kuo, Jo-Yen Chao, Wen-Chien Ko
BACKGROUND: There was a large dengue outbreak in Taiwan in 2015, in which the ages of the affected individuals were higher than those in other countries. The aim of this study was to explore the characteristics and prognostic factors for adults with severe dengue in intensive care units (ICUs). METHODS: All adults admitted to ICUs with dengue virus infection (DENV) at a medical center from July 1, 2015 to December 31, 2015 were enrolled. DENV was diagnosed by the presence of serum NS1 antigen, IgM antibodies to dengue virus, or dengue virus RNA by real-time reverse transcriptase polymerase chain reaction...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28052239/honeysuckle-aqueous-extract-and-induced-let-7a-suppress-dengue-virus-type-2-replication-and-pathogenesis
#5
Ying-Ray Lee, Siao-Fen Yeh, Xiao-Ming Ruan, Hao Zhang, Sheng-Da Hsu, Hsien-Da Huang, Chang-Chi Hsieh, Yee-Shin Lin, Trai-Ming Yeh, Hsiao-Sheng Liu, Dai-Di Gan
ETHNOPHARMACOLOGICAL RELEVANCE: Honeysuckle (Lonicera japonica Thunb.), a traditional Chinese herb, has widely been used to treat pathogen infection. However, the underlying-mechanism remains elusive. AIMS OF THE STUDY: To reveal the host microRNA (miRNA) profile with the anti-viral activity after honeysuckle treatment. MATERIALS AND METHODS: Here we reveal the differentially expressed miRNAs by Solexa(®) deep sequencing from the blood of human and mice after the aqueous extract treatment...
January 1, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28042883/utility-of-dengue-ns1-antigen-rapid-diagnostic-test-for-use-in-difficult-to-reach-areas-and-its-comparison-with-dengue-ns1-elisa-and-qrt-pcr
#6
Mohan K Shukla, Neeru Singh, Ravendra K Sharma, Pradip V Barde
The objective of this study was to demonstrate the utility of dengue virus (DENV) non structural protein 1 (NS1) based rapid diagnostic test (RDT) for use in tribal and difficult to reach areas for early dengue (DEN) diagnosis in acute phase patients and evaluate its sensitivity and specificity against DENV NS1 enzyme linked immune sorbent assay (ELISA) and real time reverse transcriptase polymerase chain reaction (qRT-PCR) The DENV NS1 RDT was used for preliminary diagnosis during outbreaks in difficult to reach rural and tribal areas...
January 2, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28034883/an-evidence-based-algorithm-for-early-prognosis-of-severe-dengue-in-the-outpatient-setting
#7
Minh Tuan Nguyen, Thi Nhan Ho, Van Vinh Chau Nguyen, Thanh Hung Nguyen, Manh Tuan Ha, Van Tram Ta, Le Da Ha Nguyen, Loi Phan, Khoi Quang Han, Thi Hue Kien Duong, Nguyen Bich Chau Tran, Wills Bridget, Marcel Wolbers, Cameron P Simmons
BACKGROUND: Early prediction of severe dengue could significantly assist patient triage and case management METHODS: We prospectively investigated 7563 children with ≤3 days of fever recruited in the outpatient departments of six hospitals in southern Vietnam between 2010 and 2013. The primary endpoint of interest was severe dengue (2009 WHO Guidelines) and pre-defined risk variables were collected at the time of enrolment to enable prognostic model development. RESULTS: The analysis population comprised 7544 patients, of whom 2060 (27...
December 28, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28031845/dengue-shock-syndrome
#8
Sreenivasa Rao Sudulagunta, Mahesh Babu Sodalagunta, Mona Sepehrar, Shiva Kumar Bangalore Raja, Aravinda Settikere Nataraju, Mounica Kumbhat, Deepak Sathyanarayana, Siddharth Gummadi, Hemanth Kumar Burra
Dengue fever is a mosquito-borne arthropod-borne viral (arboviral) tropical disease in humans affecting 50-528 million people worldwide. The acute abdominal complications of dengue fever are acute appendicitis, acute pancreatitis, acute acalculous cholecystitis and non-specific peritonitis. Acute pancreatitis with new onset diabetes in dengue shock syndrome (DSS) is very rarely reported. We describe a case of 30-year-old man admitted in intensive care unit and was diagnosed with DSS with RT-PCR, NS1 antigen and dengue IgM antibody being positive...
November 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28027928/dengue-virus-non-structural-protein-1-expression-and-associated-risk-factors-among-febrile-patients-attending-university-of-abuja-teaching-hospital-nigeria
#9
Idris Abdullahi Nasir, Olubunmi Olajide Agbede, Amos Dangana, Marycelin Baba, Abubakar Shehu Haruna
BACKGROUND: Dengue is a mosquito-borne and neglected tropical viral disease that has been reported to be hyper-endemic in Nigeria. However, this is the first dengue study in Abuja. OBJECTIVE: This hospital-based cross-sectional study investigated the prevalence of Dengue virus (DENV) non-structural protein-1 (NS1) antigenaemia, anti-Dengue virus IgG and their associated risk factors among febrile patients attending the University of Abuja Teaching Hospital (UATH), Nigeria...
December 24, 2016: Virus Research
https://www.readbyqxmd.com/read/28012140/imported-dengue-in-two-tertiary-italian-hospitals-use-of-rapid-diagnostic-tests
#10
G Calleri, I Torta, F Gobbi, A Angheben, F Lipani, A Lucchini, E Burdino, V Ghisetti, P Caramello
Dengue fever is growing at a global level both as number of cases and as geographic area of endemicity. Italy is not in endemic area, but the competent vector Aedes albopictus is widespread in this country, so that the possibility of introduction of the infection cannot be ruled out. We retrospectively collected demographic, clinical, and laboratory data about consecutive cases diagnosed in Torino and Negrar-Verona in the period 2010-2015. One hundred thirteen cases of dengue were observed, with an increasing trend during years...
December 23, 2016: Bulletin de la Société de Pathologie Exotique
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
#11
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/27995162/dataset-of-proteins-mapped-on-hepg2-cells-and-those-differentially-abundant-after-expression-of-the-dengue-non-structural-1-protein
#12
Kíssila Rabelo, Monique R O Trugilho, Simone M Costa, André T S Ferreira, Paulo C Carvalho, Jonas Perales, Ada M B Alves
The data supplied in this article are related to the research article entitled "The effect of the dengue non-structural 1 protein expression over the HepG2 cell proteins in a proteomic approach" (K. Rabelo, M.R. Trugillo, S.M. Costa, B.A. Pereira, O.C. Moreira, A.T. Ferreira et al., 2016) [1]. The present article provides the inventory of peptides and proteins mapped in a hepatocyte cell line (HepG2) by mass spectrometry in the presence of the non-structural protein 1 (NS1) of Dengue 2 virus (DENV2). Cells were transfected with pcENS1 plasmid, which encodes the DENV2 NS1 protein, or the controls pcDNA3 (negative control) or pMAXGFP, encoding the green fluorescent protein (GFP), a protein unrelated to dengue...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/27986543/magnitude-of-viremia-antigenemia-and-infection-of-circulating-monocytes-in-children-with-mild-and-severe-dengue
#13
Federico Perdomo-Celis, Doris M Salgado, Carlos F Narváez
Dengue is a major public health problem in tropical regions around the world. Viral and immune host factors determine the clinical courses of the infection. We analyzed the dynamics of viremia (by real-time polymerase chain reactions), antigenemia (through detection of the viral non-structural protein [NS]-1 by enzyme-linked immunosorbent assays) and the frequency of virus-infected peripheral blood mononuclear cells (PBMCs) (by multiparametric flow cytometry) in children with primary or secondary dengue virus (DENV) infection in mild to severe cases...
December 13, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27982728/a-comparison-of-nanoparticle-antibody-conjugation-strategies-in-sandwich-immunoassays
#14
Justina O Tam, Helena de Puig, Chun-Wan Yen, Irene Bosch, Jose Gómez-Márquez, Charles Clavet, Kimberly Hamad-Schifferli, Lee Gehrke
Point-of-care (POC) diagnostics such as lateral flow and dipstick immunoassays use gold nanoparticle (NP)-antibody conjugates for visual readout. We investigated the effects of NP conjugation, surface chemistries, and antibody immobilization methods on dipstick performance. We compared orientational, covalent conjugation, electrostatic adsorption, and a commercial conjugation kit for dipstick assays to detect dengue virus NS1 protein. Assay performance depended significantly on their conjugate properties. We also tested arrangements of multiple test lines within strips...
December 16, 2016: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/27982356/vertical-transmission-of-dengue-infection-the-first-putative-case-reported-in-china
#15
Xueru Yin, Xiaozhu Zhong, Shilei Pan
Dengue is a systemic viral infection that is commonly transmitted between humans via mosquitoes. Other modes of transmission such as the vertical one are rare and have been infrequently reported in the literature. This report investigates one case of vertical transmission of dengue in Guangzhou, China. A G1P1 lady at 39 weeks of gestation was referred to the Huzhong Hospital presenting a fever for two days. She subsequently developed a skin rash on the back and lower limb and at that time she had already experienced five days of fever...
December 8, 2016: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/27957384/mitigating-the-risk-of-transfusion-transmitted-dengue-in-australia
#16
Kelly Rooks, Clive R Seed, Jesse J Fryk, Catherine A Hyland, Robert J Harley, Jerry A Holmberg, Denese C Marks, Robert L P Flower, Helen M Faddy
Dengue viruses (DENV 1-4) are a risk to transfusion safety, with several transfusion-transmitted (TT) cases reported globally. DENV 1-4 are endemic in over 100 countries, with seasonal outbreaks occurring in northeastern Australia. To mitigate TT-DENV risk in Australia, fresh blood components are not manufactured from donors returning from any area (domestic/overseas) with known dengue transmission. Alternatively, TT-DENV risk may be mitigated using an appropriate blood donor screening assay. We aimed to determine the rate of dengue infection in donors during dengue outbreaks in Australia...
2016: Journal of Blood Transfusion
https://www.readbyqxmd.com/read/27955870/evaluation-of-a-pan-serotype-point-of-care-rapid-diagnostic-assay-for-accurate-detection-of-acute-dengue-infection
#17
Rosario Vivek, Syed Fazil Ahamed, Shalini Kotabagi, Anmol Chandele, Ira Khanna, Navin Khanna, Kaustuv Nayak, Mary Dias, Murali-Krishna Kaja, Anita Shet
The catastrophic rise in dengue infections in India and globally has created a need for an accurate, validated low-cost rapid diagnostic test (RDT) for dengue. We prospectively evaluated the diagnostic performance of NS1/IgM RDT (dengue day 1) using 211 samples from a pediatric dengue cohort representing all 4 serotypes in southern India. The dengue-positive panel consisted of 179 dengue real-time polymerase chain reaction (RT-PCR) positive samples from symptomatic children. The dengue-negative panel consisted of 32 samples from dengue-negative febrile children and asymptomatic individuals that were negative for dengue RT-PCR/NS1 enzyme-linked immunosorbent assay/IgM/IgG...
September 30, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27955749/ns1-antigen-a-new-beam-of-light-in-the-early-diagnosis-of-dengue-infection
#18
Muhammad Suleman, Rani Faryal, Muhammad Masroor Alam, Salmaan Sharif, Shahzad Shaukat, Uzma Bashir Aamir, Adnan Khurshid, Mehar Angez, Massab Umair, Mian Muhammad Sufian, Yasir Arshad, Ghulam Mujtaba, Syed Sohail Zahoor Zaidi
OBJECTIVE: To evaluate NS1 antigen detection ELISA for the early laboratory diagnosis of dengue virus infection. METHODS: The present study was conducted to evaluate the overall positivity of NS1 antigen detection ELISA and its comparison with viral RNA detection via real time PCR and IgM antibodies detection by ELISA. RESULTS: A total of 1270 serum samples were tested 86% (1097/1270) were detected positive by one or more than one diagnostic test...
December 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27940224/the-calmodulin-antagonist-w-7-n-6-aminohexyl-5-chloro-1-naphthalenesulfonamide-hydrochloride-inhibits-denv-infection-in-huh-7-cells
#19
Patricia Bautista-Carbajal, Ruben Soto-Acosta, Antonio H Angel-Ambrocio, Margot Cervantes-Salazar, Circe I Loranca-Vega, Mayra Herrera-Martínez, Rosa M Del Angel
Dengue virus (DENV) replicative cycle occurs in the endoplasmic reticulum where calcium ions play an important role in cell signaling. Calmodulin (CaM) is the primary sensor of intracellular Ca(2+) levels in eukaryotic cells. In this paper, the effect of the calmodulin antagonist W-7 in DENV infection in Huh-7 cells was evaluated. W7 inhibited viral yield, NS1 secretion and viral RNA and protein synthesis. Moreover, luciferase activity, encoded by a DENV replicon, was also reduced. A decrease in the replicative complexes formation was clearly observed in W7 treated cells...
January 15, 2017: Virology
https://www.readbyqxmd.com/read/27918577/control-of-aedes-aegypti-breeding-a-novel-intervention-for-prevention-and-control-of-dengue-in-an-endemic-zone-of-delhi-india
#20
B N Nagpal, Sanjeev Kumar Gupta, Arshad Shamim, Kumar Vikram, Aruna Srivastava, N R Tuli, Rekha Saxena, Himmat Singh, V P Singh, V N Bhagat, N K Yadav, Neena Valecha
BACKGROUND AND OBJECTIVE: The study is based on hypothesis that whether continuous entomological surveillance of Ae. aegypti and simultaneous appropriate interventions in key containers during non-transmission (December-May) months would have any impact on breeding of Aedes and dengue cases during the following transmission months (June-November). The impact of the surveillance and intervention measures undertaken during non-transmission months were assessed by entomological indicators namely container index (CI), house index (HI), pupal index (PI) and breteau index (BI)...
2016: PloS One
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