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Japanese encephalitis vaccine

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https://www.readbyqxmd.com/read/28814523/screening-of-fda-approved-drugs-for-inhibitors-against-japanese-encephalitis-virus-infection
#1
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. There is no approved drug available for JEV-specific treatment, and the vaccines are not effective against all clinical JEV isolates. Herein, a high-throughput screening was performed against JEV from an FDA-approved drug library. Five hit drugs were identified that inhibited JEV infection with a selective index > 10. Antiviral activities of these five hit drugs against other flavivirus, including Zika virus, were also validated...
August 16, 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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28740748/a-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus-candidate-vaccine-based-on-japanese-encephalitis-virus-replicon-system
#7
Pingsheng Hu, Xiaoming Chen, Lihong Huang, Shukai Liu, Fuyu Zang, Jinchao Xing, Youyue Zhang, Jiaqi Liang, Guihong Zhang, Ming Liao, Wenbao Qi
In the swine industry, porcine reproductive and respiratory syndrome (PRRS) is a highly contagious disease which causes heavy economic losses worldwide. Effective prevention and disease control is an important issue. In this study, we described the construction of a Japanese encephalitis virus (JEV) DNA-based replicon with a cytomegalovirus (CMV) promoter based on the genome of Japanese encephalitis live vaccine virus SA14-14-2, which is capable of offering a potentially novel way to develop and produce vaccines against a major pathogen of global health...
2017: PeerJ
https://www.readbyqxmd.com/read/28728201/-fever-and-headache-after-a-vacation-in-thailand
#8
Benedikt Schwermer, Daniel Eschle, Constantine Bloch-Infanger
History 50 year-old man with fever and headache starting one week after returning from his vacation in Thailand. His general practitioner prescribed amoxicillin/clavulanic acid, without further analyses to pinpoint the infection. Examinations The examination of cerebro-spinal fluid was crucial for the final diagnosis. Lumbar puncture demonstrated a predominantly mononuclear pleocytosis of 80 cells/µl (< 5) with an elevated protein of 782 mg/l (< 450); glucose and lactate were within normal limits...
July 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28716891/which-dengue-vaccine-approach-is-the-most-promising-and-should-we-be-concerned-about-enhanced-disease-after-vaccination-the-path-to-a-dengue-vaccine-learning-from-human-natural-dengue-infection-studies-and-vaccine-trials
#9
Aravinda M de Silva, Eva Harris
Dengue virus (DENV) is the most common arthropod-borne viral disease of humans. Although effective vaccines exist against other flaviviral diseases like yellow fever and Japanese encephalitis, dengue vaccine development is complicated by the presence of four virus serotypes and the possibility of partial immunity enhancing dengue disease severity. Several live attenuated dengue vaccines are being tested in human clinical trials. Initial results are mixed, with variable efficacy depending on DENV serotype and previous DENV exposure...
July 17, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28671301/detection-of-long-term-cellular-immune-response-to-japanese-encephalitis-vaccination-using-ifn-%C3%AE-elispot-assay
#10
Amreen Zia, Dharamveer Singh, Swati Saxena, Jyoti Umrao, Manjari Baluni, Sneha Ghildiyal, Tanzeem Fatima, Mukti Shukla, Vikas Agarwal, Tapan N Dhole
Vaccine is the most effective preventive measure against Japanese Encephalitis infection. Role of IFN-γ expressing T cells for JE virus clearance has been described as a part of cellular immunity. Vaccine induced immunity also involve the cellular immune response, therefore the study was aimed to observe induction and persistence of IFN-γ expressing T cells by IFN-γ ELISpot assay. The cell count increased significantly after 28 (p < 0.0001) days post vaccination, and remained higher at all time points (day 28, day 180, day 360) when compared with prevaccination...
July 3, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28594790/japanese-encephalitis-surveillance-and-immunization-asia-and-western-pacific-regions-2016
#11
James D Heffelfinger, Xi Li, Nyambat Batmunkh, Varja Grabovac, Sergey Diorditsa, Jayantha B Liyanage, Sirima Pattamadilok, Sunil Bahl, Kirsten S Vannice, Terri B Hyde, Susan Y Chu, Kimberley K Fox, Susan L Hills, Anthony A Marfin
Japanese encephalitis (JE) virus is the most important vaccine-preventable cause of encephalitis in the Asia-Pacific region. The World Health Organization (WHO) recommends integration of JE vaccination into national immunization schedules in all areas where the disease is a public health priority (1). This report updates a previous summary of JE surveillance and immunization programs in Asia and the Western Pacific in 2012 (2). Since 2012, funding for JE immunization has become available through the GAVI Alliance, three JE vaccines have been WHO-prequalified,* and an updated WHO JE vaccine position paper providing guidance on JE vaccines and vaccination strategies has been published (1)...
June 9, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28577343/de-novo-rna-synthesis-catalyzed-by-the-zika-virus-rna-polymerase-domain
#12
Christina Calmels, Michel Ventura, Cindy Aknin, Mathieu Métifiot, Marie-Line Andreola
Mosquito- and tick-borne pathogens including Chikungunya, Dengue, Japanese encephalitis, West Nile, Yellow fever and Zika virus, represent a new economic and public health challenge. In the absence of effective vaccines and specific therapies, only supportive regimens are administrated for most of these infections. Thus, the development of a targeted therapy is mandatory to stop the rapid progression of these pathogens and preoccupant associated burdens such as Guillain-Barre syndrome, microcephaly. For this, it is essential to develop biochemical tools to help study and target key viral enzymes involved in replication such as helicase complexes, methyl-transferases and RNA-dependent RNA polymerases...
June 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28574016/coverage-missed-opportunity-for-japanese-encephalitis-vaccine-gorakhpur-division-uttar-pradesh-india-2015-implications-for-japanese-encephalitis-control
#13
Manoj V Murhekar, Chinmay Oak, Prashant Ranjan, K Kanagasabai, Satish Shinde, Ashok Kumar Pandey, Mahima Mittal, Milind Gore, Sanjay M Mehendale
BACKGROUND & OBJECTIVES: Japanese encephalitis (JE) is an important aetiology of acute encephalitis syndrome in Gorakhpur division, Uttar Pradesh, India. Two doses of JE vaccine ( first during 9-12 months and second during 16-24 months of age) are administered under the Universal Immunization Programme. We conducted surveys to estimate the coverage of JE vaccine and magnitude of missed opportunity for vaccination (MoV) for JE in Gorakhpur division. METHODS: To estimate the JE vaccine coverage, cluster surveys were conducted in four districts of Gorakhpur division by selecting 30 clusters by probability proportional to size method in each district, seven children aged 25-36 months were selected from each cluster and their mothers were interviewed about JE vaccination...
January 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28560654/newer-vaccines-against-mosquito-borne-diseases
#14
Anju Aggarwal, Neha Garg
Mosquitos are responsible for a number of protozoal and viral diseases. Malaria, dengue, Japanese encephalitis (JE) and chikungunya epidemics occur commonly all over the world, leading to marked mortality and morbidity in children. Zika, Yellow fever and West Nile fever are others requiring prevention. Environmental control and mosquito bite prevention are useful in decreasing the burden of disease but vaccination has been found to be most cost-effective and is the need of the hour. RTS,S/AS01 vaccine is the first malaria vaccine being licensed for use against P...
May 31, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28552510/post-marketing-safety-surveillance-for-inactivated-and-live-attenuated-japanese-encephalitis-vaccines-in-china-2008-2013
#15
Wendi Wu, Dawei Liu, Keli Li, J Pekka Nuorti, Hanna M Nohynek, Disha Xu, Jiakai Ye, Jingshan Zheng, Huaqing Wang
INTRODUCTION: Two types of Japanese encephalitis (JE) vaccines, inactivated JE vaccine (JE-I) and live-attenuated JE vaccine (JE-L), are available and used in China. In particular, one JE-L, produced by a domestic manufacturer in China, was prequalified by WHO in 2013. We assessed the safety of JE vaccines in China during 2008-2013 using the Chinese National Adverse Events Following Immunization Information System (CNAEFIS) data. METHODS: We retrieved AEFI reporting data about JE vaccines from CNAEFIS, 2008-2013, examined demographic characteristics of AEFI cases, and used administrative data on vaccine doses as denominator to calculate and compare crude reporting rates...
June 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28536430/aetiology-of-acute-meningoencephalitis-in-cambodian-children-2010-2013
#16
Paul F Horwood, Veasna Duong, Denis Laurent, Channa Mey, Heng Sothy, Ky Santy, Beat Richner, Seiha Heng, Sopheak Hem, Justine Cheval, Christopher Gorman, Philippe Dussart, Menno D de Jong, Alexandra Kerleguer, Bertrand Guillard, Bernadette Murgue, Marc Lecuit, Xavier de Lamballerie, Jeremy J Farrar, Arnaud Tarantola, Marc Eloit, Philippe Buchy
Acute meningoencephalitis (AME) is associated with considerable morbidity and mortality in children in developing countries. Clinical specimens were collected from children presenting with AME at two Cambodian paediatric hospitals to determine the major aetiologies associated with AME in the country. Cerebrospinal fluid (CSF) and blood samples were screened by molecular and cell culture methods for a range of pathogens previously associated with AME in the region. CSF and serum (acute and convalescent) were screened for antibodies to arboviruses such as Japanese encephalitis virus (JEV), dengue virus (DENV), and chikungunya virus (CHIKV)...
May 24, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28531165/a-japanese-encephalitis-virus-vaccine-inducing-antibodies-strongly-enhancing-in-vitro-infection-is-protective-in-pigs
#17
Obdulio García-Nicolás, Meret E Ricklin, Matthias Liniger, Nathalie J Vielle, Sylvie Python, Philippe Souque, Pierre Charneau, Artur Summerfield
The Japanese encephalitis virus (JEV) is responsible for zoonotic severe viral encephalitis transmitted by Culex mosquitoes. Although birds are reservoirs, pigs play a role as amplifying hosts, and are affected in particular through reproductive failure. Here, we show that a lentiviral JEV vector, expressing JEV prM and E proteins (TRIP/JEV.prME), but not JEV infection induces strong antibody-dependent enhancement (ADE) activities for infection of macrophages. Such antibodies strongly promoted infection via Fc receptors...
May 22, 2017: Viruses
https://www.readbyqxmd.com/read/28515719/production-of-japanese-encephalitis-virus-antigens-in-plants-using-bamboo-mosaic-virus-based-vector
#18
Tsung-Hsien Chen, Chung-Chi Hu, Jia-Teh Liao, Yi-Ling Lee, Ying-Wen Huang, Na-Sheng Lin, Yi-Ling Lin, Yau-Heiu Hsu
Japanese encephalitis virus (JEV) is among the major threats to public health in Asia. For disease control and prevention, the efficient production of safe and effective vaccines against JEV is in urgent need. In this study, we produced a plant-made JEV vaccine candidate using a chimeric virus particle (CVP) strategy based on bamboo mosaic virus (BaMV) for epitope presentation. The chimeric virus, designated BJ2A, was constructed by fusing JEV envelope protein domain III (EDIII) at the N-terminus of BaMV coat protein, with an insertion of the foot-and-mouth disease virus 2A peptide to facilitate the production of both unfused and epitope-presenting for efficient assembly of the CVP vaccine candidate...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28509619/japanese-encephalitis-virus-infection-rate-and-detection-of-genotype-i-from-culex-tritaeniorhynchus-collected-from-jiangsu-china
#19
Hongliang Chu, Zhiming Wu, Hongna Chen, Chunxiao Li, Xiaoxia Guo, Ran Liu, Gang Wang, Minghao Zhou, Tongyan Zhao
Information regarding the infection rate and genotype shifts for Japanese encephalitis virus (JEV) are important for JE vaccine application. In Jiangsu province, China, which is one of the provinces with a high prevalence of JE, JEV infection in swine and mosquitoes in certain cities has only been investigated in 2008-2009. Lianyungang City has one of the highest numbers of JE cases in Jiangsu province, and it has a high risk of JEV invasion via migrant birds. JEV infection in vectors in Lianyungang City, which has urban and rural parts, has not been investigated...
July 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28501474/a-case-of-mumps-related-acute-encephalopathy-with-biphasic-seizures-and-late-reduced-diffusion
#20
Kyoko Hazama, Takashi Shiihara, Hiroyuki Tsukagoshi, Shunji Hasegawa, Yuri Dowa, Mio Watanabe
BACKGROUND: Mumps is a common childhood viral disease characterized by fever and swelling of the parotid gland. The prognosis is generally good, although some complications, such as encephalitis (0.1%), exist. Acute encephalopathy with biphasic seizures and late reduced diffusion is the most common type of acute encephalopathy. However, this type of encephalopathy has not been reported in association with mumps infection. PATIENT: A previously healthy 3-year-old Japanese boy had a brief convulsion after fever for 3days, and then had conscious disturbance and parotitis...
May 10, 2017: Brain & Development
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