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https://www.readbyqxmd.com/read/29339794/hpv-16-virions-can-remain-infectious-for-2-weeks-on-senescent-cells-but-require-cell-cycle-re-activation-to-allow-virus-entry
#1
Justyna Broniarczyk, Nadja Ring, Paola Massimi, Mauro Giacca, Lawrence Banks
Successful infection with Human Papillomaviruses requires mitosis, when incoming viral genomes gain access to nuclear components. However, very little is known about how long HPV particles can remain infectious in non-dividing cells or in which cellular compartments these viruses may reside. To investigate these questions we have used BJ cells as a reversible model of senescence and show that HPV-16 can only infect early-passage proliferating cells. Late-passage senescent cells are resistant to HPV infection, but this can be reversed by inducing cell cycle re-entry with a p53 siRNA...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29244615/risk-assessment-for-japanese-encephalitis-vaccination
#2
Lance Turtle, Carolyn Driver
Japanese encephalitis (JE) is the most commonly diagnosed viral encephalitis in Asia. JE is caused by a virus called JE virus (JEV), a member of the genus Flavivirus, family Flaviviridae, and is transmitted by Culex mosquitoes. Neutralising antibody to JEV protects against JE, and can be induced by vaccination. JE is a potential threat to travellers to endemic areas, which are most of South and Southeast Asia and some Pacific Islands. The risk of JE can be expected to increase with increasing mosquito exposure and time spent in regions and seasons of active transmission...
December 15, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29242091/association-between-microcephaly-zika-virus-infection-and-other-risk-factors-in-brazil-final-report-of-a-case-control-study
#3
Thalia Velho Barreto de Araújo, Ricardo Arraes de Alencar Ximenes, Demócrito de Barros Miranda-Filho, Wayner Vieira Souza, Ulisses Ramos Montarroyos, Ana Paula Lopes de Melo, Sandra Valongueiro, Maria de Fátima Pessoa Militão de Albuquerque, Cynthia Braga, Sinval Pinto Brandão Filho, Marli Tenório Cordeiro, Enrique Vazquez, Danielle di Cavalcanti Souza Cruz, Claudio Maierovitch Pessanha Henriques, Luciana Caroline Albuquerque Bezerra, Priscila Mayrelle da Silva Castanha, Rafael Dhalia, Ernesto Torres Azevedo Marques-Júnior, Celina Maria Turchi Martelli, Laura Cunha Rodrigues
BACKGROUND: A Zika virus epidemic emerged in northeast Brazil in 2015 and was followed by a striking increase in congenital microcephaly cases, triggering a declaration of an international public health emergency. This is the final report of the first case-control study evaluating the potential causes of microcephaly: congenital Zika virus infection, vaccines, and larvicides. The published preliminary report suggested a strong association between microcephaly and congenital Zika virus infection...
December 11, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29237469/bat-rabies-surveillance-in-france-first-report-of-unusual-mortality-among-serotine-bats
#4
Evelyne Picard-Meyer, Alexandre Servat, Marine Wasniewski, Matthieu Gaillard, Christophe Borel, Florence Cliquet
BACKGROUND: Rabies is a fatal viral encephalitic disease that is caused by lyssaviruses which can affect all mammals, including human and bats. In Europe, bat rabies cases are attributed to five different lyssavirus species, the majority of rabid bats being attributed to European bat 1 lyssavirus (EBLV-1), circulating mainly in serotine bats (Eptesicus serotinus). In France, rabies in bats is under surveillance since 1989, with 77 positive cases reported between 1989 and 2016. CASE PRESENTATION: In the frame of the bat rabies surveillance, an unusual mortality of serotine bats was reported in 2009 in a village in North-East France...
December 13, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29217375/preliminary-aggregate-safety-and-immunogenicity-results-from-three-trials-of-a-purified-inactivated-zika-virus-vaccine-candidate-phase-1-randomised-double-blind-placebo-controlled-clinical-trials
#5
Kayvon Modjarrad, Leyi Lin, Sarah L George, Kathryn E Stephenson, Kenneth H Eckels, Rafael A De La Barrera, Richard G Jarman, Erica Sondergaard, Janice Tennant, Jessica L Ansel, Kristin Mills, Michael Koren, Merlin L Robb, Jill Barrett, Jason Thompson, Alison E Kosel, Peter Dawson, Andrew Hale, C Sabrina Tan, Stephen R Walsh, Keith E Meyer, James Brien, Trevor A Crowell, Azra Blazevic, Karla Mosby, Rafael A Larocca, Peter Abbink, Michael Boyd, Christine A Bricault, Michael S Seaman, Anne Basil, Melissa Walsh, Veronica Tonwe, Daniel F Hoft, Stephen J Thomas, Dan H Barouch, Nelson L Michael
BACKGROUND: A safe, effective, and rapidly scalable vaccine against Zika virus infection is needed. We developed a purified formalin-inactivated Zika virus vaccine (ZPIV) candidate that showed protection in mice and non-human primates against viraemia after Zika virus challenge. Here we present the preliminary results in human beings. METHODS: We did three phase 1, placebo-controlled, double-blind trials of ZPIV with aluminium hydroxide adjuvant. In all three studies, healthy adults were randomly assigned by a computer-generated list to receive 5 μg ZPIV or saline placebo, in a ratio of 4:1 at Walter Reed Army Institute of Research, Silver Spring, MD, USA, or of 5:1 at Saint Louis University, Saint Louis, MO, USA, and Beth Israel Deaconess Medical Center, Boston, MA, USA...
December 4, 2017: Lancet
https://www.readbyqxmd.com/read/29187546/pathogenesis-humoral-immune-responses-and-transmission-between-co-housed-animals-in-a-ferret-model-of-human-rsv-infection
#6
Kok Fei Chan, Louise A Carolan, Julian Druce, Keith Chappell, Daniel Watterson, Paul Young, Daniil Korenkov, Kanta Subbarao, Ian G Barr, Karen L Laurie, Patrick C Reading
Small animal models have been used to obtain many insights regarding the pathogenesis and immune responses induced following infection with human respiratory syncytial virus (hRSV). Amongst those described to date, infections in cotton rats, mice, guinea pigs, chinchillas and Syrian hamsters with hRSV strains Long and/or A2 have been well characterised, although clinical isolates have also been examined. Ferrets are also susceptible to hRSV infection but the pathogenesis and immune responses elicited following infection have not been well characterised...
November 29, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29185252/multidrug-resistant-or-antimicrobial-resistant-pathogens-alternatives-to-new-antibiotics
#7
Anne-Sophie Brunel, Benoit Guery
For the last few decades, multidrug resistance has become an increasing concern for both Gram-positive and Gram-negative bacteria. The number of new molecules has dramatically decreased and antibiotic resistance is now a priority in the international community. Facing this new threat, a large number of new as well as "old" solutions are now being discussed in the medical community to propose an alternative to antibiotic treatments. A first option is to potentiate the effect of existing molecules through combinations to circumvent the individual molecule resistance...
November 29, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/29162867/broad-spectrum-antiviral-agents-secreted-phospholipase-a2-targets-viral-envelope-lipid-bilayers-derived-from-the-endoplasmic-reticulum-membrane
#8
Ming Chen, Chie Aoki-Utsubo, Masanori Kameoka, Lin Deng, Yutaka Terada, Wataru Kamitani, Kei Sato, Yoshio Koyanagi, Makoto Hijikata, Keiko Shindo, Takeshi Noda, Michinori Kohara, Hak Hotta
Hepatitis C virus (HCV), dengue virus (DENV) and Japanese encephalitis virus (JEV) belong to the family Flaviviridae. Their viral particles have the envelope composed of viral proteins and a lipid bilayer acquired from budding through the endoplasmic reticulum (ER). The phospholipid content of the ER membrane differs from that of the plasma membrane (PM). The phospholipase A2 (PLA2) superfamily consists of a large number of members that specifically catalyse the hydrolysis of phospholipids at a particular position...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29158182/confirmation-of-specificity-of-reactivity-in-a-solid-phase-elisa-for-the-detection-of-hepatitis-e-viral-antigen-improves-utility-of-the-assay
#9
M J Ankcorn, S Ijaz, B Haywood, J Neuberger, A M Elsharkawy, J Maggs, R S Tedder
Genotype 3 hepatitis E virus (HEV) can lead to persistent infections in immunocompromised hosts. A recently available commercial assay for the detection of HEV antigen (HEV-Ag ELISA, Wantai diagnostics) may enable the study of HEV-Ag dynamics in such persistent infections, however currently there is no confirmatory test available. We generated a putative neutralising reagent from a pool of four convalescent blood donor samples and explored neutralising activity against HEV antigens from clinical samples, HEV tissue-culture and virus-like particles...
November 20, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29157957/selection-of-vaccine-strains-for-serotype-o-foot-and-mouth-disease-viruses-2007-2012-circulating-in-southeast-asia-east-asia-and-far-east
#10
Mana Mahapatra, Sasmita Upadhyaya, Sharie Aviso, Aravindh Babu, Geoff Hutchings, Satya Parida
Foot-and-mouth disease (FMD) is endemic in Southeast Asia (SEA) and East Asia with circulation of multiple serotypes and multiple genotypes within each serotype of the virus. Although countries like Japan and South Korea in the Far East were free of FMD, in 2010 FMD serotype O (O/Mya-98) outbreaks were recorded and since then South Korea has experienced several FMD outbreaks despite regular vaccination. In this study a total of 85 serotype O FMD viruses (FMDV) isolated from 2007 to 2012 from SEA, East Asia and Far East were characterized by virus neutralisation tests using antisera to four existing (O/HKN/6/83, O/IND/R2/75, O/SKR/2010 and O/PanAsia-2) and one putative (O/MYA/2009) vaccine strains, and by full capsid sequencing...
November 17, 2017: Vaccine
https://www.readbyqxmd.com/read/29155139/the-generation-and-characterisation-of-neutralising-antibodies-against-the-theiler-s-murine-encephalomyelitis-virus-tmev-gdvii-capsid-reveals-the-potential-binding-site-of-the-host-cell-co-receptor-heparan-sulfate
#11
Nicole Upfold, Caroline Ross, Özlem Tastan Bishop, Garry A Luke, Caroline Knox
The early stages of picornavirus capsid assembly and the host factors involved are poorly understood. Since the localisation of viral proteins in infected cells can provide information on their function, antibodies against purified Theiler's murine encephalomyelitis virus (TMEV) GDVII capsids were generated by immunisation of rabbits. The resultant anti-TMEV capsid antibodies recognised a C-terminal region of VP1 but not VP2 or VP3 by Western analysis. Examination of the sites of TMEV capsid assembly by indirect immunofluorescence and confocal microscopy showed that at 5hours post infection, capsid signal was diffusely cytoplasmic with strong perinuclear staining and moved into large punctate structures from 6 to 8hours post infection...
November 16, 2017: Virus Research
https://www.readbyqxmd.com/read/29151123/a-coxsackievirus-b-vaccine-protects-against-virus-induced-diabetes-in-an-experimental-mouse-model-of-type-1-diabetes
#12
Virginia M Stone, Minna M Hankaniemi, Emma Svedin, Amirbabak Sioofy-Khojine, Sami Oikarinen, Heikki Hyöty, Olli H Laitinen, Vesa P Hytönen, Malin Flodström-Tullberg
AIMS/HYPOTHESIS: Epidemiological studies suggest a role for Coxsackievirus B (CVB) serotypes in the pathogenesis of type 1 diabetes, but their actual contribution remains elusive. In the present study, we have produced a CVB1 vaccine to test whether vaccination against CVBs can prevent virus-induced diabetes in an experimental model. METHODS: NOD and SOCS1-tg mice were vaccinated three times with either a formalin-fixed non-adjuvanted CVB1 vaccine or a buffer control...
November 18, 2017: Diabetologia
https://www.readbyqxmd.com/read/29108665/evaluation-of-a-polyvalent-foot-and-mouth-disease-virus-vaccine-containing-a-saudi-95-against-field-challenge-on-large-scale-dairy-farms-in-saudi-arabia-with-the-emerging-a-asia-g-vii-viral-lineage
#13
Nicholas A Lyons, Anna B Ludi, Ginette Wilsden, Pip Hamblin, Ibrahim Ahmed Qasim, Simon Gubbins, Donald P King
In 2015, foot-and-mouth disease (FMD) viruses of the A/ASIA/G-VII lineage emerged from the Indian sub-continent to cause outbreaks in the Middle and Near East. A factor which has been proposed to have contributed to the rapid spread of this lineage is the poor in vitro vaccine-match of field isolates to vaccine strains that are commonly used in the region. This study used data from outbreaks on four large-scale dairy farms using routine vaccination in Saudi Arabia, to evaluate the impact of vaccination and learn how to manage outbreaks more effectively in this setting...
November 3, 2017: Vaccine
https://www.readbyqxmd.com/read/29102329/genetic-and-antigenic-characterization-of-serotype-o-fmd-viruses-from-east-africa-for-the-selection-of-suitable-vaccine-strain
#14
Katie Lloyd-Jones, Mana Mahapatra, Sasmita Upadhyaya, David J Paton, Aravindh Babu, Geoff Hutchings, Satya Parida
Foot-and-mouth disease (FMD) is endemic in Eastern Africa with circulation of multiple serotypes of the virus in the region. Most of the outbreaks are caused by serotype O followed by serotype A. The lack of concerted FMD control programmes in Africa has provided little incentive for vaccine producers to select vaccines that are tailored to circulating regional isolates creating further negative feedback to deter the introduction of vaccine-based control schemes. In this study a total of 80 serotype O FMD viruses (FMDV) isolated from 1993 to 2012 from East and North Africa were characterized by virus neutralisation tests using bovine antisera to three existing (O/KEN/77/78, O/Manisa and O/PanAsia-2) and three putative (O/EA/2002, O/EA/2009 and O/EA/2010) vaccine strains and by capsid sequencing...
November 1, 2017: Vaccine
https://www.readbyqxmd.com/read/29022386/bacillus-toyonensis-improves-immune-response-in-the-mice-vaccinated-with-recombinant-antigen-of-bovine-herpesvirus-type-5
#15
F D S Santos, Y A Menegon, R E A Piraine, P R C Rodrigues, R C Cunha, F P Leivas Leite
Probiotics modulate the immune response and can increase the effectiveness of vaccines. Bacillus toyonensis is widely used as a probiotic in animal feed. The aim of this study was to assess the effects of B. toyonensis administration on the immune response to an experimental recombinant vaccine against bovine herpesvirus type 5 (BoHV-5) in mice. Mice were vaccinated with BoHV-5 recombinant glycoprotein D and supplemented with the probiotic B. toyonensis in two regimes: one group received the probiotic only during seven days prior to the initial vaccination while the second group was given the probiotic throughout the experimental period of seven weeks...
October 12, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28985239/safety-and-immunogenicity-of-rvsv%C3%AE-g-zebov-gp-ebola-vaccine-in-adults-and-children-in-lambar%C3%A3-n%C3%A3-gabon-a-phase-i-randomised-trial
#16
RANDOMIZED CONTROLLED TRIAL
Selidji T Agnandji, José F Fernandes, Emmanuel B Bache, Régis M Obiang Mba, Jessica S Brosnahan, Lumeka Kabwende, Paul Pitzinger, Pieter Staarink, Marguerite Massinga-Loembe, Verena Krähling, Nadine Biedenkopf, Sarah Katharina Fehling, Thomas Strecker, David J Clark, Henry M Staines, Jay W Hooper, Peter Silvera, Vasee Moorthy, Marie-Paule Kieny, Akim A Adegnika, Martin P Grobusch, Stephan Becker, Michael Ramharter, Benjamin Mordmüller, Bertrand Lell, Sanjeev Krishna, Peter G Kremsner
BACKGROUND: The rVSVΔG-ZEBOV-GP vaccine prevented Ebola virus disease when used at 2 × 107 plaque-forming units (PFU) in a trial in Guinea. This study provides further safety and immunogenicity data. METHODS AND FINDINGS: A randomised, open-label phase I trial in Lambaréné, Gabon, studied 5 single intramuscular vaccine doses of 3 × 103, 3 × 104, 3 × 105, 3 × 106, or 2 × 107 PFU in 115 adults and a dose of 2 × 107 PFU in 20 adolescents and 20 children. The primary objective was safety and tolerability 28 days post-injection...
October 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28977009/safety-efficacy-and-immunogenicity-evaluation-of-the-sag2-oral-rabies-vaccine-in-formosan-ferret-badgers
#17
Ai-Ping Hsu, Chun-Hsien Tseng, Jacques Barrat, Shu-Hwae Lee, Yu-Hua Shih, Marine Wasniewski, Philippe Mähl, Chia-Chia Chang, Chun-Ta Lin, Re-Shang Chen, Wen-Jane Tu, Florence Cliquet, Hsiang-Jung Tsai
Since 2013, rabies cases have been reported among Formosan ferret badgers in Taiwan, and they have been shown to be the major reservoirs for Taiwanese enzootics. To control and eradicate rabies, the authorities plan to implement a vaccination programme. Before distributing live vaccines in the field, this study assessed the safety, efficacy, and immunogenicity of SAG2 vaccine on ferret badgers by direct oral instillation. After application of 109 TCID50/dose, no virus was excreted into the oral cavity 1-7 days post-application, and safety was also satisfactorily verified over a 266-day period...
2017: PloS One
https://www.readbyqxmd.com/read/28969696/efficacy-of-rabies-vaccines-in-dogs-and-cats-and-protection-in-a-mouse-model-against-european-bat-lyssavirus-type-2
#18
Tiina Nokireki, Miia Jakava-Viljanen, Anna-Maija Virtala, Liisa Sihvonen
BACKGROUND: Rabies is preventable by pre- and/or post-exposure prophylaxis consisting of series of rabies vaccinations and in some cases the use of immunoglobulins. The success of vaccination can be estimated either by measuring virus neutralising antibodies or by challenge experiment. Vaccines based on rabies virus offer cross-protection against other lyssaviruses closely related to rabies virus. The aim was to assess the success of rabies vaccination measured by the antibody response in dogs (n = 10,071) and cats (n = 722), as well as to investigate the factors influencing the response to vaccination when animals failed to reach a rabies antibody titre of ≥ 0...
October 2, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28965516/high-prevalence-of-seoul-hantavirus-in-a-breeding-colony-of-pet-rats
#19
L M McELHINNEY, D A Marston, K C Pounder, H Goharriz, E L Wise, J Verner-Carlsson, D Jennings, N Johnson, A Civello, A Nunez, T Brooks, A C Breed, J Lawes, Å Lundkvist, C A Featherstone, A R Fooks
As part of further investigations into three linked haemorrhagic fever with renal syndrome (HFRS) cases in Wales and England, 21 rats from a breeding colony in Cherwell, and three rats from a household in Cheltenham were screened for hantavirus. Hantavirus RNA was detected in either the lungs and/or kidney of 17/21 (81%) of the Cherwell rats tested, higher than previously detected by blood testing alone (7/21, 33%), and in the kidneys of all three Cheltenham rats. The partial L gene sequences obtained from 10 of the Cherwell rats and the three Cheltenham rats were identical to each other and the previously reported UK Cherwell strain...
October 2, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28956525/emerging-arboviruses-in-quebec-canada-assessing-public-health-risk-by-serology-in-humans-horses-and-pet-dogs
#20
J P Rocheleau, P Michel, L R Lindsay, M Drebot, A Dibernardo, N H Ogden, A Fortin, J Arsenault
Periodic outbreaks of West Nile virus (WNV), Eastern equine encephalitis virus (EEEV) and to a lesser extent, California serogroup viruses (CSGV), have been reported in parts of Canada in the last decade. This study was designed to provide a broad assessment of arboviral activity in Quebec, Canada, by conducting serological surveys for these arboviruses in 196 horses, 1442 dogs and 485 humans. Sera were screened by a competitive enzyme linked immunosorbent assay and positive samples confirmed by plaque reduction neutralisation tests...
October 2017: Epidemiology and Infection
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