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vaccine; immunization; immunisation

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https://www.readbyqxmd.com/read/28504575/alleviation-of-enterotoxigenic-escherichia-coli-challenge-by-recombinant-lactobacillus-plantarum-expressing-a-faeg-and-dc-targeting-peptide-fusion-protein
#1
G Yang, Y Jiang, P Tong, C Li, W Yang, J Hu, L Ye, W Gu, C Shi, B Shan, C Wang
FaeG is the major subunit of K88 fimbriae. These cell surface attachments are considered to be the major virulence factor of enterotoxigenic Escherichia coli (ETEC), which causes diarrhoea in piglets. The use of dendritic cell-targeting peptide (DCpep) has been demonstrated to be an effective approach to enhance the immunity of vaccines. Lactobacillus plantarum is an attractive candidate for oral vaccination owing to its beneficial effects and safety. In this study, L. plantarum was employed to deliver a FaeG-DCpep fusion antigen, and the immune response in mice was evaluated...
May 15, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28501809/non-specific-effects-of-vaccines-plausible-and-potentially-important-but-implications-uncertain
#2
REVIEW
Andrew J Pollard, Adam Finn, Nigel Curtis
Non-specific effects (NSE) or heterologous effects of vaccines are proposed to explain observations in some studies that certain vaccines have an impact beyond the direct protection against infection with the specific pathogen for which the vaccines were designed. The importance and implications of such effects remain controversial. There are several known immunological mechanisms which could lead to NSE, since it is widely recognised that the generation of specific immunity is initiated by non-specific innate immune mechanisms that may also have wider effects on adaptive immune function...
May 13, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28495264/community-engagement-and-integrated-health-and-polio-immunisation-campaigns-in-conflict-affected-areas-of-pakistan-a-cluster-randomised-controlled-trial
#3
Muhammad Atif Habib, Sajid Soofi, Simon Cousens, Saeed Anwar, Najib Ul Haque, Imran Ahmed, Noshad Ali, Rehman Tahir, Zulfiqar A Bhutta
BACKGROUND: Pakistan faces huge challenges in eradicating polio due to widespread poliovirus transmission and security challenges. Innovative interventions are urgently needed to strengthen community buy-in, to increase the coverage of oral polio vaccine (OPV) and other routine immunisations, and to enhance immunity through the introduction of inactivated polio vaccine (IPV) in combination with OPV. We aimed to evaluate the acceptability and effect on immunisation coverage of an integrated strategy for community engagement and maternal and child health immunisation campaigns in insecure and conflict-affected polio-endemic districts of Pakistan...
June 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28479181/carbohydrate-fatty-acid-monosulphate-esters-are-safe-and-effective-adjuvants-for-humoral-responses
#4
Luuk A Th Hilgers, Peter Paul L I Platenburg, Jeffrey Bajramovic, Jennifer Veth, Robert Sauerwein, Will Roeffen, Marie Pohl, Geert van Amerongen, Koert J Stittelaar, Johannes F van den Bosch
Carbohydrate fatty acid sulphate esters (CFASEs) formulated in a squalane-in-water emulsion are effective adjuvants for humoral responses to a wide range of antigens in various animal species but rise in body temperature and local reactions albeit mild or minimal hampers application in humans. In rabbits, body temperature increased 1°C one day after intramuscular (IM) injection, which returned to normal during the next day. The effect increased with increasing dose of CFASE but not with the number of injections (up to 5)...
May 31, 2017: Vaccine
https://www.readbyqxmd.com/read/28475122/harnessing-local-immunity-for-an-effective-universal-swine-influenza-vaccine
#5
REVIEW
Elma Tchilian, Barbara Holzer
Influenza A virus infections are a global health threat to humans and are endemic in pigs, contributing to decreased weight gain and suboptimal reproductive performance. Pigs are also a source of new viruses of mixed swine, avian, and human origin, potentially capable of initiating human pandemics. Current inactivated vaccines induce neutralising antibody against the immunising strain but rapid escape occurs through antigenic drift of the surface glycoproteins. However, it is known that prior infection provides a degree of cross-protective immunity mediated by cellular immune mechanisms directed at the more conserved internal viral proteins...
May 5, 2017: Viruses
https://www.readbyqxmd.com/read/28472067/the-effect-of-current-schistosoma-mansoni-infection-on-the-immunogenicity-of-a-candidate-tb-vaccine-mva85a-in-bcg-vaccinated-adolescents-an-open-label-trial
#6
Anne Wajja, Dennison Kizito, Beatrice Nassanga, Angela Nalwoga, Joyce Kabagenyi, Simon Kimuda, Ronald Galiwango, Gertrude Mutonyi, Samantha Vermaak, Iman Satti, Jaco Verweij, Edridah Tukahebwa, Stephen Cose, Jonathan Levin, Pontiano Kaleebu, Alison M Elliott, Helen McShane
INTRODUCTION: Helminth infection may affect vaccine immunogenicity and efficacy. Adolescents, a target population for tuberculosis booster vaccines, often have a high helminth burden. We investigated effects of Schistosoma mansoni (Sm) on the immunogenicity and safety of MVA85A, a model candidate tuberculosis vaccine, in BCG-vaccinated Ugandan adolescents. METHODS: In this phase II open label trial we enrolled 36 healthy, previously BCG-vaccinated adolescents, 18 with no helminth infection detected, 18 with Sm only...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28459105/crude-childhood-vaccination-coverage-in-west-africa-trends-and-predictors-of-completeness
#7
Jacob S Kazungu, Ifedayo M O Adetifa
Background: Africa has the lowest childhood vaccination coverage worldwide. If the full benefits of childhood vaccination programmes are to be enjoyed in sub-Saharan Africa, all countries need to improve on vaccine delivery to achieve and sustain high coverage. In this paper, we review trends in vaccination coverage, dropouts between vaccine doses and explored the country-specific predictors of complete vaccination in West Africa.  Methods: We utilized datasets from the Demographic and Health Surveys Program, available for Benin, Burkina Faso, The Gambia, Ghana, Guinea, Cote d'Ivoire, Liberia, Mali, Niger, Nigeria, Senegal, Sierra Leone and Togo, to obtain coverage for Bacillus Calmette-Guerin, polio, measles, and diphtheria, pertussis and tetanus (DPT) vaccines in children aged 12 - 23 months...
February 15, 2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28454649/variable-bcg-efficacy-in-rhesus-populations-pulmonary-bcg-provides-protection-where-standard-intra-dermal-vaccination-fails
#8
Frank A W Verreck, Elma Z Tchilian, Richard A W Vervenne, Claudia C Sombroek, Ivanela Kondova, Okke A Eissen, Vinod Sommandas, Nicole M van der Werff, Ernst Verschoor, Gerco Braskamp, Jaco Bakker, Jan A M Langermans, Peter J Heidt, Tom H M Ottenhoff, Klaas W van Kralingen, Alan W Thomas, Peter C L Beverley, Clemens H M Kocken
M.bovis BCG vaccination against tuberculosis (TB) notoriously displays variable protective efficacy in different human populations. In non-human primate studies using rhesus macaques, despite efforts to standardise the model, we have also observed variable efficacy of BCG upon subsequent experimental M. tuberculosis challenge. In the present head-to-head study, we establish that the protective efficacy of standard parenteral BCG immunisation varies among different rhesus cohorts. This provides different dynamic ranges for evaluation of investigational vaccines, opportunities for identifying possible correlates of protective immunity and for determining why parenteral BCG immunisation sometimes fails...
May 2017: Tuberculosis
https://www.readbyqxmd.com/read/28449735/maternal-pertussis-immunisation-clinical-gains-and-epidemiological-legacy
#9
Ana I Bento, Aaron A King, Pejman Rohani
The increase in whooping cough (pertussis) incidence in many countries with high routine vaccination coverage is alarming, with incidence in the US reaching almost 50,000 reported cases per year, reflecting incidence levels not seen since the 1950s. While the potential explanations for this resurgence remain debated, we face an urgent need to protect newborns, especially during the time window between birth and the first routine vaccination dose. Maternal immunisation has been proposed as an effective strategy for protecting neonates, who are at higher risk of severe pertussis disease and mortality...
April 13, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28448627/engineering-chimeric-human-and-mouse-major-histocompatibility-complex-mhc-class-i-tetramers-for-the-production-of-t-cell-receptor-tcr-mimic-antibodies
#10
Demin Li, Carol Bentley, Jenna Yates, Maryam Salimi, Jenny Greig, Sarah Wiblin, Tasneem Hassanali, Alison H Banham
Therapeutic monoclonal antibodies targeting cell surface or secreted antigens are among the most effective classes of novel immunotherapies. However, the majority of human proteins and established cancer biomarkers are intracellular. Peptides derived from these intracellular proteins are presented on the cell surface by major histocompatibility complex class I (MHC-I) and can be targeted by a novel class of T-cell receptor mimic (TCRm) antibodies that recognise similar epitopes to T-cell receptors. Humoural immune responses to MHC-I tetramers rarely generate TCRm antibodies and many antibodies recognise the α3 domain of MHC-I and β2 microglobulin (β2m) that are not directly involved in presenting the target peptide...
2017: PloS One
https://www.readbyqxmd.com/read/28433702/group-b-streptococcus-and-respiratory-syncytial-virus-immunisation-during-pregnancy-a-landscape-analysis
#11
REVIEW
Paul T Heath, Fiona J Culley, Christine E Jones, Beate Kampmann, Kirsty Le Doare, Marta C Nunes, Manish Sadarangani, Zain Chaudhry, Carol J Baker, Peter J M Openshaw
Group B streptococcus and respiratory syncytial virus are leading causes of infant morbidity and mortality worldwide. No licensed vaccines are available for either disease, but vaccines for both are under development. Severe respiratory syncytial virus disease can be prevented by passively administered antibody. The presence of maternal IgG antibody specific to respiratory syncytial virus is associated with reduced prevalence and severity of respiratory syncytial virus disease in the first few weeks of life, whereas maternal serotype-specific anticapsular antibody is associated with protection against both early-onset and late-onset group B streptococcus disease...
April 19, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28389483/epidemiology-of-rubella-infection-in-cameroon-a-7-year-experience-of-measles-and-rubella-case-based-surveillance-2008-2014
#12
Marcellin Nimpa Mengouo, Valantine Ngum Ndze, Frangy Baonga, Marie Kobela, Charles Shey Wiysonge
OBJECTIVE: The aim of this study was to estimate the proportion of rubella disease in a measles case-based surveillance in Cameroon prior to rubella vaccine introduction into the national immunisation programme. DESIGN: This was a cross-sectional study for rubella infection in Cameroon for the period 2008 to 2014. SETTING: Patients suspected with measles from the 10 regions of Cameroon were recruited according to the WHO measles case definition and were tested for rubella IgM antibodies accompanied with the case report/investigation forms...
April 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28378596/bcg-loaded-chitosan-microparticles-interaction-with-macrophages-and-preliminary-in-vivo-studies
#13
Liliana Aranha Caetano, Lara Figueiredo, António J Almeida, L M D Gonçalves
The aim of this study was to develop a novel BCG-loaded chitosan vaccine with high association efficiency which can afford efficient interaction with APC and elicit local and Th1-type-specific immune response after intranasal administration. Chitosan-suspended BCG and BCG-loaded chitosan-alginate microparticles were prepared by ionotropic gelation. Interaction with APC was evaluated by fluorescence microscopy using rBCG-GFP. Specific immune responses were evaluated following intranasal immunisation of mice...
April 19, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28375554/inflammatory-responses-to-influenza-vaccination-at-the-extremes-of-age
#14
Jacqueline U McDonald, Ziyun Zhong, Helen T Groves, John S Tregoning
Age affects the immune response to vaccination, with individuals at the extremes of age responding poorly. The initial inflammatory response to antigenic materials shapes the subsequent adaptive response and so understanding is required about the effect of age on the profile of acute inflammatory mediators. In this study we measured the local and systemic inflammatory response after influenza vaccination or infection in neonatal, young adult and aged mice. Mice were immunised intramuscularly with inactivated influenza vaccine with and without the adjuvant MF59 and then challenged with H1N1 influenza...
April 4, 2017: Immunology
https://www.readbyqxmd.com/read/28367510/determination-of-factors-affecting-the-vaccination-status-of-children-aged-12-35-months-in-lao-people-s-democratic-republic
#15
Anonh Xeuatvongsa, Masahiko Hachiya, Shinsuke Miyano, Tetsuya Mizoue, Tomomi Kitamura
Vaccines are one of the most important achievements in public health, and a major contributor to this success is the Expanded Programme on Immunization. The utilisation of vaccination services and completion of the recommended schedule are determined by numerous factors. In Lao People's Democratic Republic (Lao PDR), the overall immunisation coverage has been improving. However, notwithstanding the improvement in immunisation coverage and the supplementary immunisation activities, there have been measles, diphtheria, and polio outbreaks in the country...
March 2017: Heliyon
https://www.readbyqxmd.com/read/28360258/impact-of-maternal-antibodies-and-infant-gut-microbiota-on-the-immunogenicity-of-rotavirus-vaccines-in-african-indian-and-european-infants-protocol-for-a-prospective-cohort-study
#16
Kuladaipalayam Natarajan C Sindhu, Nigel Cunliffe, Matthew Peak, Mark Turner, Alistair Darby, Nicholas Grassly, Melita Gordon, Queen Dube, Sudhir Babji, Ira Praharaj, Valsan Verghese, Miren Iturriza-Gómara, Gagandeep Kang
INTRODUCTION: Gastroenteritis is the leading cause of morbidity and mortality among young children living in resource-poor settings, majority of which is attributed to rotavirus. Rotavirus vaccination can therefore have a significant impact on infant mortality. However, rotavirus vaccine efficacy in Sub-Saharan Africa and Southeast Asia is significantly lower than in high-income countries. Maternally derived antibodies, infant gut microbiota and concomitant oral polio vaccination have been proposed as potential reasons for poor vaccine performance in low-income settings...
March 29, 2017: BMJ Open
https://www.readbyqxmd.com/read/28342664/a-novel-live-attenuated-anthrax-spore-vaccine-based-on-an-acapsular-bacillus-anthracis-sterne-strain-with-mutations-in-the-htra-lef-and-cya-genes
#17
Theodor Chitlaru, Ma'ayan Israeli, Shahar Rotem, Uri Elia, Erez Bar-Haim, Sharon Ehrlich, Ofer Cohen, Avigdor Shafferman
We recently reported the development of a novel, next-generation, live attenuated anthrax spore vaccine based on disruption of the htrA (High Temperature Requirement A) gene in the Bacillus anthracis Sterne veterinary vaccine strain. This vaccine exhibited a highly significant decrease in virulence in murine, guinea pig and rabbit animal models yet preserved the protective value of the parental Sterne strain. Here, we report the evaluation of additional mutations in the lef and cya genes, encoding for the toxin components lethal factor (LF) and edema factor (EF), to further attenuate the SterneΔhtrA strain and improve its compatibility for human use...
March 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28340570/the-therapeutic-hiv-env-c5-gp41-vaccine-candidate-vacc-c5-induces-specific-t-cell-regulation-in-a-phase-i-ii-clinical-study
#18
Kristin Brekke, Maja Sommerfelt, Mats Ökvist, Anne Margarita Dyrhol-Riise, Dag Kvale
BACKGROUND: Levels of non-neutralising antibodies (AB) to the C5 domain of HIV Env gp120 are inversely related to progression of HIV infection. In this phase I/II clinical study we investigated safety of Vacc-C5, a peptide-based therapeutic vaccine candidate corresponding to C5/gp41(732-744) as well as the effects on pre-existing AB levels to C5/gp41(732-744), immune activation and T cell responses including exploratory assessments of Vacc-C5-induced T cell regulation. Our hypothesis was that exposure of the C5 peptide motif may have detrimental effects due to several of its HLA-like features and that enhancement of non-neutralising anti-C5 AB by vaccination could reduce C5 exposure and thereby chronic immune activation...
March 24, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28335329/nanoparticle-based-delivery-of-anaplasma-marginale-membrane-proteins-virb9-1-and-virb10-produced-in-the-pichia-pastoris-expression-system
#19
Bing Zhang, Antonio S Cavallaro, Karishma T Mody, Jun Zhang, James R Deringer, Wendy C Brown, Timothy J Mahony, Chengzhong Yu, Neena Mitter
Bovine anaplasmosis or cattle-tick fever is a tick-borne haemolytic disease caused by the rickettsial haemoparasite Anaplasma marginale in tropical and subtropical areas of the world. While difficult to express, the proteins VirB9-1 and VirB10 are immunogenic components of the outer membrane type IV secretion system that have been identified as candidate antigens for vaccines targeting of A. marginale. Soluble VirB9-1 and VirB10 were successfully expressed using Pichia pastoris. When formulated with the self-adjuvanting silica vesicles, SV-100 (diameter: 50 nm, and pore entrance size: 6 nm), 200 µg of VirB9-1 and VirB10 were adsorbed per milligram of nanoparticle...
November 5, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333957/immune-response-of-rats-vaccinated-orally-with-various-plant-expressed-recombinant-cysteine-proteinase-constructs-when-challenged-with-fasciola-hepatica-metacercariae
#20
Malgorzata Kesik-Brodacka, Agnieszka Lipiec, Monika Kozak Ljunggren, Luiza Jedlina, Katarzyna Miedzinska, Magdalena Mikolajczak, Andrzej Plucienniczak, Andrzej B Legocki, Halina Wedrychowicz
BACKGROUND: Cysteine proteinases of Fasciola hepatica are important candidates for vaccine antigens because of their role in fluke biology and host-parasite relationships. In our previous experiments, we found that a recombinant cysteine proteinase cloned from adult F. hepatica (CPFhW) can protect rats against liver fluke infections when it is administered intramuscularly or intranasally in the form of cDNA. We also observed considerable protection upon challenge following mucosal vaccination with inclusion bodies containing recombinant CPFhW produced in Escherichia coli...
March 2017: PLoS Neglected Tropical Diseases
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