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Japanese encephalitis vaccine

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https://www.readbyqxmd.com/read/29050802/episode-of-kasabach-merritt-phenomenon-following-japanese-encephalitis-vaccination-case-report
#1
Xiaojie Yue, Xiong Zhao, Yefeng Dai, Qiang Shu
Kasabach-Merritt phenomenon (KMP) is a rare potentially life-threatening consumptive coagulopathy characterized by thrombocytopenia and hypofibrinogenemia occurring associated with the vascular tumors kaposiform hemangioendothelioma (KHE) and tufted angioma (TA). A 10-month old male infant, diagnosed with KHE on his left leg, underwent a rapid increase of the lesion and severe thrombocytopenia, one day after the first dose of inactivated Japanese encephalitis (JE) vaccination. The episode of KMP was treated successfully by steroid...
October 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28969658/characterization-and-epitope-mapping-of-dengue-virus-type-1-specific-monoclonal-antibodies
#2
Wen-Hung Chen, Feng-Pai Chou, Yu-Kuo Wang, Sheng-Cih Huang, Chuan-Hung Cheng, Tung-Kung Wu
BACKGROUND: Dengue virus (DV) infection causes a spectrum of clinical diseases ranging from dengue fever to a life-threatening dengue hemorrhagic fever. Four distinct serotypes (DV1-4), which have similar genome sequences and envelope protein (E protein) antigenic properties, were divided. Among these 4 serotypes, DV1 usually causes predominant infections and fast diagnosis and effective treatments are urgently required to prevent further hospitalization and casualties. METHODS: To develop antibodies specifically targeting and neutralizing DV1, we immunized mice with UV-inactivated DV1 viral particles and recombinant DV1 E protein from residue 1 to 395 (E395), and then generated 12 anti-E monoclonal antibodies (mAbs) as the candidates for a series of characterized assays such as ELISA, dot blot, immunofluorescence assay, western blot, and foci forming analyses...
October 2, 2017: Virology Journal
https://www.readbyqxmd.com/read/28959858/-progress-in-zika-virus-and-its-vaccines
#3
Deqiao Tian, Wei Chen
Like Yellow fever virus, Dengue virus, Japanese encephalitis virus and West Nile virus, Zika virus is also a mosquito-borne flavivirus. Since it was isolated in 1947, there has been little concern over Zika virus due to its limited distribution and mild symptoms. In recent years, especially since 2015, Zika virus has become a global concern because of its outbreak in Brazil and associated microcephaly. Vaccines against Zika virus, regarded as the effective measures to control Zika fever epidemic, are being developed in nearly thirty institutions worldwide...
January 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28938099/plasmid-dna-launches-live-attenuated-japanese-encephalitis-virus-and-elicits-virus-neutralizing-antibodies-in-balb-c-mice
#4
Brian Nickols, Irina Tretyakova, Alexander Tibbens, Elena Klyushnenkova, Peter Pushko
We describe novel plasmid DNA that encodes the full-length Japanese encephalitis virus (JEV) genomic cDNA and launches live-attenuated JEV vaccine in vitro and in vivo. The synthetic cDNA based on the sequence of JEV SA14-14-2 live-attenuated virus was placed under transcriptional control of the cytomegalovirus major immediate-early promoter. The stability and yields of the plasmid in E. coli were optimized by inserting three synthetic introns that disrupted JEV cDNA in the structural and nonstructural genes...
December 2017: Virology
https://www.readbyqxmd.com/read/28934197/updated-estimation-of-the-impact-of-a-japanese-encephalitis-immunization-program-with-live-attenuated-sa-14-14-2-vaccine-in-nepal
#5
Shyam Raj Upreti, Nicole P Lindsey, Rajendra Bohara, Ganga Ram Choudhary, Sushil Shakya, Mukunda Gautam, Jagat Narain Giri, Marc Fischer, Susan L Hills
BACKGROUND: Japanese encephalitis (JE) is a mosquito-borne disease that is associated with considerable morbidity and mortality in many Asian countries. The objective of this study was to describe the impact of the JE immunization program using SA 14-14-2 JE vaccine implemented in Nepal during 2006 through 2011. A previous assessment after the initial program implementation phase described a significantly lower post-campaign JE incidence compared to expected incidence; however, the previous evaluation had limited post-campaign data for some districts...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28930529/a-protocol-for-investigating-the-association-of-vaccination-and-anti-nmda-receptor-encephalitis
#6
Hsiuying Wang
Anti-N-methyl-D-aspartate (Anti-NMDA) receptor encephalitis is an acute autoimmune neurological disorder that can be triggered by virus, H1N1/tetanus/diphtheria/pertussis and polio vaccines or by presence of a tumor. The association between anti-NMDA receptor encephalitis and Japanese encephalitis vaccination was examined and a general protocol of phylogenetic method which details the steps and code and an example of its utility is provided. The approach used here is potentially useful for analyzing the relationship between vaccines and diseases...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28883984/the-changing-epidemiology-of-japanese-encephalitis-and-new-data-the-implications-for-new-recommendations-for-japanese-encephalitis-vaccine
#7
REVIEW
Bradley Connor, William B Bunn
The epidemiology of Japanese Encephalitis and risk to the traveler has changed and continues to evolve. The spread of Japanese Encephalitis virus into new environments, changes in agricultural practice and animal vectors, climate change, peri-urban growth, changes in international travel to Asia, personal risk factors, mosquito vector free transmission, interactions with other flaviviruses and better information on infections without encephalitis and other factors make Japanese Encephalitis an underappreciated risk...
2017: Tropical Diseases, Travel Medicine and Vaccines
https://www.readbyqxmd.com/read/28876040/-secreted-expression-of-japanese-encephalitis-virus-prme-in-pichia-pastoris-and-immunogenicity-evaluation-of-the-virus-like-particles-in-mice
#8
Peng Zhao, Ya Jiang, Jingman Wang, Haojie Fan, Ruibing Cao
The study was to express prME protein of Japanese encephalitis virus (JEV) in Pichia pastoris and then to evaluate the immunological properties of the recombinant protein in mice, so as to explore a new way for subunit vaccine development of JEV. The JEV prME gene was amplified by RT-PCR with genome RNA of JEV vaccine strain SA14-14-2 and subcloned into pPICZa-A vector, designated as pPICZα-prME. pPICZα-SprME was constructed same as pPICZα-prME besides with the additional 19 Aa signal peptides coding gene of the JEV cap protein C terminal...
May 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28869941/identifying-attenuating-mutations-tools-for-a-new-vaccine-design-against-flaviviruses
#9
Cécile Khou, Nathalie Pardigon
Emerging Flaviviruses pose an increasing threat to global human health. To date, human vaccines against yellow fever virus (YFV), Japanese encephalitis virus (JEV), dengue virus (DV), and tick-borne encephalitis virus (TBEV) exist. However, there is no human vaccine against other Flaviviruses such as Zika virus (ZIKV) and West Nile virus (WNV). In order to restrict their spread and to protect populations against the diseases they induce, vaccines against these emerging viruses must be designed. Obtaining new live attenuated Flavivirus vaccines using molecular biology methods is now possible...
2017: Intervirology
https://www.readbyqxmd.com/read/28867843/estimated-economic-impact-of-vaccinations-in-73-low-and-middle-income-countries-2001-2020
#10
Sachiko Ozawa, Samantha Clark, Allison Portnoy, Simrun Grewal, Meghan L Stack, Anushua Sinha, Andrew Mirelman, Heather Franklin, Ingrid K Friberg, Yvonne Tam, Neff Walker, Andrew Clark, Matthew Ferrari, Chutima Suraratdecha, Steven Sweet, Sue J Goldie, Tini Garske, Michelle Li, Peter M Hansen, Hope L Johnson, Damian Walker
OBJECTIVE: To estimate the economic impact likely to be achieved by efforts to vaccinate against 10 vaccine-preventable diseases between 2001 and 2020 in 73 low- and middle-income countries largely supported by Gavi, the Vaccine Alliance. METHODS: We used health impact models to estimate the economic impact of achieving forecasted coverages for vaccination against Haemophilus influenzae type b, hepatitis B, human papillomavirus, Japanese encephalitis, measles, Neisseria meningitidis serogroup A, rotavirus, rubella, Streptococcus pneumoniae and yellow fever...
September 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28867626/enhanced-cytopathic-effect-of-japanese-encephalitis-virus-strain-sa14-14-2-probable-association-of-mutation-in-amino-acid-of-its-envelope-protein
#11
Barnali Nath, Ashutosh Gupta, Siraj A Khan, Sachin Kumar
Japanese encephalitis (JE) is a mosquito-borne viral disease. It is a global public health concern since it causes an acute encephalitis syndrome (AES). A large number of JE/AES cases are reported to occur in areas with established or developing JE vaccination program. Partial vaccine coverage and emergence of new variants of Japanese encephalitis virus (JEV) might be playing an important role. The envelope protein (E) of JEV is a major antigenic determinant and responsible for immunogenic responses as well as membrane fusion and virion assembly...
October 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28841362/use-of-the-live-attenuated-japanese-encephalitis-vaccine-sa-14-14-2-in-children-a-review-of-safety-and-tolerability-studies
#12
Amy Sarah Ginsburg, Ankita Meghani, Scott B Halstead, Mansour Yaich
Japanese encephalitis (JE) is the leading cause of viral neurological disease and disability in Asia. Some 50-80% of children with clinical JE die or have long-term neurologic sequelae. Since there is no cure, human vaccination is the only effective long-term control measure, and the World Health Organization recommends that at-risk populations receive a safe and effective vaccine. Four different types of JE vaccines are currently available: inactivated mouse brain-derived vaccines, inactivated Vero cell vaccines, live attenuated SA 14-14-2 vaccines and a live recombinant (chimeric) vaccine...
October 3, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28838191/expansion-of-surveillance-for-vaccine-preventable-diseases-building-on-the-global-polio-laboratory-network-and-the-global-measles-and-rubella-laboratory-network-platforms
#13
Mick N Mulders, Fatima Serhan, James L Goodson, Joseph Icenogle, Barbara W Johnson, Paul A Rota
Laboratory networks were established to provide accurate and timely laboratory confirmation of infections, an essential component of disease surveillance systems. The World Health Organization (WHO) coordinates global laboratory surveillance of vaccine-preventable diseases (VPDs), including polio, measles and rubella, yellow fever, Japanese encephalitis, rotavirus, and invasive bacterial diseases. In addition to providing high-quality laboratory surveillance data to help guide disease control, elimination, and eradication programs, these global networks provide capacity-building and an infrastructure for public health laboratories...
July 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28829730/clinical-characteristics-of-severe-japanese-encephalitis-a-case-series-from-south-korea
#14
Jun-Sang Sunwoo, Soon-Tae Lee, Keun-Hwa Jung, Kyung-Il Park, Jangsup Moon, Ki-Young Jung, Manho Kim, Sang Kun Lee, Kon Chu
Japanese encephalitis (JE) virus is a major cause of devastating viral encephalitis, especially in Asia. Although a successful vaccination program led to its near-elimination over three decades in South Korea, the incidence of JE has increased since 2010. The present study investigated the clinical manifestations, laboratory findings, and factors affecting neurological outcomes of reemerging JE. We retrospectively reviewed medical records of laboratory-confirmed JE patients who presented with acute encephalitis syndrome at three tertiary hospitals between 2010 and 2015...
August 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28814523/screening-of-fda-approved-drugs-for-inhibitors-of-japanese-encephalitis-virus-infection
#15
Shaobo Wang, Yang Liu, Jiao Guo, Peilin Wang, Leike Zhang, Gengfu Xiao, Wei Wang
Japanese encephalitis virus (JEV), an arthropod-borne flavivirus, is a major cause of acute viral encephalitis in humans. No approved drug is available for the specific treatment of JEV infections, and the available vaccines are not effective against all clinical JEV isolates. In the study described here, a high-throughput screening of an FDA-approved drug library for inhibitors of JEV was performed. Five hit drugs that inhibited JEV infection with a selective index of >10 were identified. The antiviral activities of these five hit drugs against other flavivirus, including Zika virus, were also validated...
November 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28791613/oleic-acid-enhances-dengue-virus-but-not-dengue-virus-like-particle-production-from-mammalian-cells
#16
Suwipa Ramphan, Sathiporn Suksathan, Nitwara Wikan, Puey Ounjai, Kanpong Boonthaworn, Poramate Rimthong, Tapanee Kanjanapruthipong, Suchin Worawichawong, Anan Jongkaewwattana, Nuttaporn Wongsiriroj, Duncan R Smith
Despite the recent introduction of a commercial vaccine, the mosquito-transmitted dengue virus is still a worldwide public health problem. Based on the live attenuated vaccine strategy, the commercial vaccine has a less than optimal protective profile. Virus-like particles (VLPs) offer an attractive alternate vaccination strategy due to the effectively native presentation of epitopes in the absence of any infectious genetic material. However, the production of amounts of VLP in a platform that can support commercial development remains a major obstacle...
August 8, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28789637/perceptions-practices-and-health-seeking-behaviour-constrain-je-aes-interventions-in-high-endemic-district-of-north-india
#17
Sanjay Chaturvedi, Neha Sharma, Manish Kakkar
BACKGROUND: Acute Encephalitis Syndrome (AES) and Japanese Encephalitis (JE) stay as poorly understood phenomena in India. Multiple linkages to determinants such as poverty, socio-economic status, gender, environment, and population distribution, make it a greater developmental issue than just a zoonotic disease. METHODS: A qualitative study was conducted to map knowledge, perceptions and practices of community and health systems level stakeholders. Seventeen interviews with utilizers of AES care, care givers from human and veterinary sectors, Non-governmental Organizations (NGOs), and pig owners and 4 Focused Group Discussions (FGDs) with farmers, community leaders, and students were conducted in an endemic north Indian district-Kushinagar...
August 8, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28774810/preparedness-of-adolescents-departing-from-athens-international-airport-to-africa-or-asia-a-five-year-airport-based-prospective-study
#18
Helena C Maltezou, Androula Pavli, Kalliopi Theodoridou, Eleftherios Bournousouzis, Athanasios Minitsios, Panos Katerelos, Ioanna Lymperi, Maria Theodoridou
BACKGROUND: The number of adolescents who travel has increased. We estimated the preparedness of adolescents (12-18 years) departing from Athens to Africa and Asia. METHODS: An airport-based survey was conducted from 2011 to 2015. RESULTS: Sixty-eight adolescents participated; 27/68 (40%) had the Greek nationality. Their main destinations were the Indian subcontinent (37%) and South-East Asia (32%). Most adolescents planned to stay for <1 month (69%) or for 1-3 months (22%)...
August 1, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28754189/progress-and-works-in-progress-update-on-flavivirus-vaccine-development
#19
REVIEW
Matthew H Collins, Stefan W Metz
Most areas of the globe are endemic for at least one flavivirus, putting billions at risk for infection. This diverse group of viral pathogens causes a range of manifestations in humans from asymptomatic infection to hemorrhagic fever to encephalitis to birth defects and even death. Many flaviviruses are transmitted by mosquitos and have expanded in geographic distribution in recent years, with dengue virus being the most prevalent, infecting approximately 400 million people each year. The explosive emergence of Zika virus in Latin America in 2014 refocused international attention on this medically important group of viruses...
July 25, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28753671/self-reported-infections-during-international-travel-and-notifiable-infections-among-returning-international-travellers-sweden-2009-2013
#20
Viktor Dahl, Anders Wallensten
We studied food and water-borne diseases (FWDs), sexually transmitted diseases (STDs), vector-borne diseases (VBDs) and diseases vaccinated against in the Swedish childhood vaccination programme among Swedish international travellers, in order to identify countries associated with a high number of infections. We used the national database for notifiable infections to estimate the number of FWDs (campylobacteriosis, salmonellosis, giardiasis, shigellosis, EHEC, Entamoeba histolytica, yersinosis, hepatitis A, paratyphoid fever, typhoid fever, hepatitis E, listeriosis, cholera), STIs (chlamydia, gonorrhoea and acute hepatitis B), VBDs (dengue fever, malaria, West Nile fever, Japanese encephalitis and yellow fever) and diseases vaccinated against in the Swedish childhood vaccination programme (pertussis, measles, mumps, rubella, diphtheria) acquired abroad 2009-2013...
2017: PloS One
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