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https://www.readbyqxmd.com/read/28818102/field-evaluation-of-the-efficacy-of-mycobacterium-bovis-bcg-vaccine-against-tuberculosis-in-goats
#1
Enric Vidal, Claudia Arrieta-Villegas, Miriam Grasa, Irene Mercader, Mariano Domingo, Bernat Pérez de Val
BACKGROUND: Control of animal tuberculosis (TB) through vaccination has emerged as a long-term strategy to complement test and slaughter control strategy. A pilot trial under field conditions was conducted in a goat herd with high TB prevalence to assess the efficacy of the Mycobacterium bovis BCG vaccine. RESULTS: Twenty-three goat kids vaccinated with BCG and other 22 unvaccinated control kids were euthanized at 18 months post-vaccination. Gross pathological and histopathological examination of target tissues was performed for detection of tuberculous lesions and assessment of vaccine efficacy...
August 17, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28817682/experimental-study-of-tuberculosis-from-animal-models-to-complex-cell-systems-and-organoids
#2
REVIEW
Kaori L Fonseca, Pedro N S Rodrigues, I Anna S Olsson, Margarida Saraiva
Tuberculosis (TB) is a devastating disease to mankind that has killed more people than any other infectious disease. Despite many efforts and successes from the scientific and health communities, the prospect of TB elimination remains distant. On the one hand, sustainable public health programs with affordable and broad implementation of anti-TB measures are needed. On the other hand, achieving TB elimination requires critical advances in three areas: vaccination, diagnosis, and treatment. It is also well accepted that succeeding in advancing these areas requires a deeper knowledge of host-pathogen interactions during infection, and for that, better experimental models are needed...
August 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28802400/mycobacterium-tuberculosis-myma-is-a-tlr2-agonist-that-activate-macrophages-and-a-th1-response
#3
Iti Saraav, Swati Singh, Kirti Pandey, Monika Sharma, Sadhna Sharma
Cell wall of Mycobacterium tuberculosis (M.tb) is a major source of immunogenic proteins that can be tested as vaccine candidates. MymA (Rv3083), a 55 kDa M.tb flavin containing monooxygenase, is involved in modification of mycolic acids during acidic shock following M.tb internalization in macrophage. In this study, we have investigated the role of this cell wall associated protein in activation of macrophages by toll like receptor (TLRs) engagement and subsequent signaling. Our results showed that MymA stimulation of THP1 cells and human monocyte derived macrophages (MDM) lead to upregulation of TLR2 and co-stimulatory molecules CD40, CD80, CD86 and HLA-DR...
September 2017: Tuberculosis
https://www.readbyqxmd.com/read/28802398/a-mycobacterial-growth-inhibition-assay-mgia-for-bovine-tb-vaccine-development
#4
Ilaria Pepponi, Bhagwati Khatri, Rachel Tanner, Bernardo Villarreal-Ramos, Martin Vordermeier, Helen McShane
Human tuberculosis remains a significant cause of mortality and morbidity throughout the world. The global economic impact of bovine TB is considerable. An effective vaccine would be the most cost-effective way to control both epidemics, particularly in emerging economies. TB vaccine research would benefit from the identification of an immune correlate of protection with which vaccines could be gated at both preclinical and clinical levels. In-vitro mycobacterial growth inhibition assays (MGIA) are functional assays that include most aspects of the complex host immune response to mycobacteria, and they may serve as functional immune correlates for vaccine development...
September 2017: Tuberculosis
https://www.readbyqxmd.com/read/28797384/long-term-effect-of-bacille-calmette-gu%C3%A3-rin-vaccination-in-tuberculin-skin-testing-a-new-reality-for-tb-prevention
#5
EDITORIAL
Roland Diel
No abstract text is available yet for this article.
August 2017: Chest
https://www.readbyqxmd.com/read/28797115/ranking-93-health-interventions-for-low-and-middle-income-countries-by-cost-effectiveness
#6
Susan Horton, Hellen Gelband, Dean Jamison, Carol Levin, Rachel Nugent, David Watkins
BACKGROUND: Cost-effectiveness rankings of health interventions are useful inputs for national healthcare planning and budgeting. Previous comprehensive rankings for low- and middle- income countries were undertaken in 2005 and 2006, accompanying the development of strategies for the Millennium Development Goals. We update the rankings using studies published since 2000, as strategies are being considered for the Sustainable Development Goals. METHODS: Expert systematic searches of the literature were undertaken for a broad range of health interventions...
2017: PloS One
https://www.readbyqxmd.com/read/28794233/characterization-of-mycobacterium-tuberculosis-specific-cells-using-mhc-class-ii-tetramers-reveals-phenotypic-differences-related-to-hiv-infection-and-tuberculosis-disease
#7
Natalie Strickland, Tracey L Müller, Natacha Berkowitz, Rene Goliath, Mary N Carrington, Robert J Wilkinson, Wendy A Burgers, Catherine Riou
A major challenge for the development of an effective vaccine against tuberculosis (TB) is that the attributes of protective CD4(+) T cell responses are still elusive for human TB. Infection with HIV type 1 is a major risk factor for TB, and a better understanding of HIV-induced alterations of Mycobacterium tuberculosis-specific CD4(+) T cells that leads to failed host resistance may provide insight into protective T cell immunity to TB. A total of 86 participants from a TB-endemic setting, either HIV-infected or uninfected and with latent or active TB (aTB), were screened using M...
August 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28776523/screening-of-health-care-workers-for-latent-tuberculosis-infection-in-a-tertiary-care-hospital
#8
Anand Bimari Janagond, Vithiya Ganesan, G S Vijay Kumar, Arunagiri Ramesh, Prem Anand, M Mariappan
BACKGROUND: Health-care workers (HCWs) are at increased risk of acquiring tuberculosis (TB) than the general population. While national-level data on the burden of TB in general population is available from reliable sources, nationally representative data on latent tuberculosis infection (LTBI) burden in HCWs in the high burden countries is lacking. METHODS: A prospective study was carried out to assess the risk of TB infection among HCWs who directly engage in medical duties...
July 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28774560/a-novel-nanoemulsion-vaccine-induces-mucosal-interleukin-17-responses-and-confers-protection-upon-mycobacterium-tuberculosis-challenge-in-mice
#9
Mushtaq Ahmed, Douglas M Smith, Tarek Hamouda, Javier Rangel-Moreno, Ali Fattom, Shabaana A Khader
Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb) is contracted via aerosol infection, typically affecting the lungs. Mycobacterium bovis bacillus Calmette-Guerin (BCG) is the only licensed vaccine and has variable efficacy in protecting against pulmonary TB. Additionally, chemotherapy is associated with low compliance contributing to development of multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mtb. Thus, there is an urgent need for the design of more effective vaccines against TB...
July 31, 2017: Vaccine
https://www.readbyqxmd.com/read/28744263/recombinant-invasive-lactococcus-lactis-carrying-a-dna-vaccine-coding-the-ag85a-antigen-increases-inf-%C3%AE-il-6-and-tnf-%C3%AE-cytokines-after-intranasal-immunization
#10
Pamela Mancha-Agresti, Camila Prosperi de Castro, Janete S C Dos Santos, Maíra A Araujo, Vanessa B Pereira, Jean G LeBlanc, Sophie Y Leclercq, Vasco Azevedo
Tuberculosis (TB) remains a major threat throughout the world and in 2015 it caused the death of 1.4 million people. The Bacillus Calmette-Guérin is the only existing vaccine against this ancient disease; however, it does not provide complete protection in adults. New vaccines against TB are eminently a global priority. The use of bacteria as vehicles for delivery of vaccine plasmids is a promising vaccination strategy. In this study, we evaluated the use of, an engineered invasive Lactococcus lactis (expressing Fibronectin-Binding Protein A from Staphylococcus aureus) for the delivery of DNA plasmid to host cells, especially to the mucosal site as a new DNA vaccine against tuberculosis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28742838/identification-of-novel-antigen-candidates-for-a-tuberculosis-vaccine-in-the-adult-zebrafish-danio-rerio
#11
Henna Myllymäki, Mirja Niskanen, Kaisa Ester Oksanen, Eleanor Sherwood, Maarit Ahava, Mataleena Parikka, Mika Rämet
Tuberculosis (TB) remains a major global health challenge and the development of a better vaccine takes center stage in fighting the disease. For this purpose, animal models that are capable of replicating the course of the disease and are suitable for the early-stage screening of vaccine candidates are needed. A Mycobacterium marinum infection in adult zebrafish resembles human TB. Here, we present a pre-clinical screen for a DNA-based tuberculosis vaccine in the adult zebrafish using an M. marinum infection model...
2017: PloS One
https://www.readbyqxmd.com/read/28738015/observational-study-to-estimate-the-changes-in-the-effectiveness-of-bacillus-calmette-gu%C3%A3-rin-bcg-vaccination-with-time-since-vaccination-for-preventing-tuberculosis-in-the-uk
#12
Punam Mangtani, Patrick Nguipdop-Djomo, Ruth H Keogh, Lucy Trinder, Peter G Smith, Paul Em Fine, Jonathan Sterne, Ibrahim Abubakar, Emilia Vynnycky, John Watson, David Elliman, Marc Lipman, Laura C Rodrigues
BACKGROUND: Until recently, evidence that protection from the bacillus Calmette-Guérin (BCG) vaccination lasted beyond 10 years was limited. In the past few years, studies in Brazil and the USA (in Native Americans) have suggested that protection from BCG vaccination against tuberculosis (TB) in childhood can last for several decades. The UK's universal school-age BCG vaccination programme was stopped in 2005 and the programme of selective vaccination of high-risk (usually ethnic minority) infants was enhanced...
July 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28733429/proteogenomic-analysis-and-discovery-of-immune-antigens-in-mycobacterium-vaccae
#13
Jianhua Zheng, Lihong Chen, Liguo Liu, Haifeng Li, Bo Liu, Dandan Zheng, Tao Liu, Jie Dong, Lilian Sun, Yafang Zhu, Jian Yang, Xiaobing Zhang, Qi Jin
Tuberculosis (TB) is one of the leading causes of death worldwide, especially in developing countries. Neonatal BCG vaccination occurs in various regions, but the level of protection varies in different populations. Recently, Mycobacterium vaccae is found to be an immunomodulating therapeutic agent that could confer a significant level of protection against TB. It is the only vaccine in a phase III trial from WHO to assess its efficacy and safety in preventing TB disease in people with latent TB infection. However, the mechanism of immunotherapy of M...
July 21, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28728855/tissue-plasminogen-activator-tpa-signal-sequence-enhances-immunogenicity-of-mva-based-vaccine-against-tuberculosis
#14
Yiming Kou, Yongqing Xu, Zhilei Zhao, Jie Liu, Yang Wu, Qingrui You, Linli Wang, Feng Gao, Linjun Cai, Chunlai Jiang
Tuberculosis (TB) remains a serious health problem worldwide, and the only available vaccine, bacillus Calmette-Guérin (BCG), has shown highly variable efficacy in adults against TB. New vaccines are urgently needed, and the modified vaccinia virus Ankara (MVA)-based vaccine has emerged as one of the most promising candidates based on many preclinical and early clinical studies over the past few years. However, the maximum tolerable dose and strength of induced immune responses have limited the protective effect of MVA-based prophylactic vaccines...
July 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28722588/optimizing-direct-membrane-and-direct-skin-feeding-assays-for-plasmodium-falciparum-transmission-blocking-vaccine-trials-in-bancoumana-mali
#15
Mamadou B Coulibaly, Erin E Gabriel, Youssouf Sinaba, Daman Sylla, Adama Sacko, Lakamy Sylla, Boubacar Coulibaly, Jen C C Hume, Ibrahima Baber, Mahamadoun H Assadou, Issaka Sagara, Yimin Wu, Sara A Healy, Ogobara Doumbo, Sekou F Traore, Patrick E Duffy
Malaria transmission-blocking vaccines (TBV) have been evaluated in field trials in Mali, since 2013. However, the assays currently used to measure serum antibody TB activity (TBA) after vaccination are highly variable, in part due to the lack of optimization and standardization for field assays in which mosquitoes feed on gametocytemic blood. Herein, we report a study conducted in Bancoumana village, Mali, where we identify and optimize the parameters that contribute to successful mosquito feeding outcomes in both direct skin feeds (DSFs) and direct membrane feeding assays (DMFA)...
June 26, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719821/bcg-old-workhorse-new-skills
#16
REVIEW
M Gengenbacher, N E Nieuwenhuizen, She Kaufmann
Bacille Calmette-Guérin (BCG), the only tuberculosis (TB) vaccine in clinical practice, has limitations in efficacy, immunogenicity and safety. Much current TB vaccine research focuses on engineering live mycobacteria to interfere with phagosome biology and host intracellular pathways including apoptosis and autophagy, with candidates such as BCG Δzmp1, BCG ΔureC::hly, BCG::ESX-1(Mmar), Mtb ΔphoP ΔfadD26, Mtb ΔRD1 ΔpanCD and M. smegmatis Δesx-3::esx-3(Mtb) in the development pipeline. Correlates of protection in preclinical studies include increased central memory CD4(+) T cells and recruitment of antigen-specific T cells to the lungs, with mucosal vaccination found to be superior to parenteral vaccination...
July 15, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28714174/immunological-properties-and-protective-efficacy-of-a-single-mycobacterial-antigen-displayed-on-polyhydroxybutyrate-beads
#17
Patricia Rubio-Reyes, Natalie A Parlane, Bryce M Buddle, D Neil Wedlock, Bernd H A Rehm
In 2015, there were an estimated 10.4 million new tuberculosis (TB) cases and 1.4 million deaths worldwide. Bacille Calmette-Guérin (BCG), an attenuated strain of Mycobacterium bovis, is the vaccine available against TB, but it is insufficient for global TB control. This study evaluated the immunogenicity of the Mycobacterium tuberculosis antigen Rv1626 in mice while assessing the effect of co-delivering either Cpe30 (immunostimulatory peptide), CS.T3378-395 (promiscuous T helper epitope) or flagellin (TLR5 agonist) or a combination of all three immunostimulatory agents...
July 17, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28713838/role-of-interferons-in-the-development-of-diagnostics-vaccines-and-therapy-for-tuberculosis
#18
REVIEW
Kai Ling Chin, Fadhilah Zulkipli Anis, Maria E Sarmiento, Mohd Nor Norazmi, Armando Acosta
Tuberculosis (TB) is an airborne infection caused by Mycobacterium tuberculosis (Mtb). About one-third of the world's population is latently infected with TB and 5-15% of them will develop active TB in their lifetime. It is estimated that each case of active TB may cause 10-20 new infections. Host immune response to Mtb is influenced by interferon- (IFN-) signaling pathways, particularly by type I and type II interferons (IFNs). The latter that consists of IFN-γ has been associated with the promotion of Th1 immune response which is associated with protection against TB...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28711483/a-multistage-subunit-vaccine-effectively-protects-mice-against-primary-progressive-tuberculosis-latency-and-reactivation
#19
Jilei Ma, Xindong Teng, Xiaochun Wang, Xionglin Fan, Yaqi Wu, Maopeng Tian, Zijie Zhou, Longmeng Li
Adult tuberculosis (TB) is the main cause of TB epidemic and death. The infection results mainly by endogenous reactivation of latent TB infection and secondarily transmitted by exogenous infection. There is no vaccine for adult TB. To this end, we first chose antigens from a potential antigenic reservoir. The antigens strongly recognized T cells from latent and active TB infections that responded to antigens expressed by Mycobacterium tuberculosis cultured under different metabolic states. Fusions of single-stage polyprotein CTT3H, two-stage polyprotein A1D4, and multistage CMFO were constructed...
August 2017: EBioMedicine
https://www.readbyqxmd.com/read/28710848/breaking-transmission-with-vaccines-the-case-of-tuberculosis
#20
Jesus Gonzalo-Asensio, Nacho Aguilo, Dessislava Marinova, Carlos Martin
Members of the Mycobacterium tuberculosis complex (MTBC) have evolved causing tuberculosis (TB) in different mammalian hosts. MTBC ecotypes have adapted to diverse animal species, with M. bovis being the most common cause of TB in livestock. Cattle-to-human transmission of M. bovis through ingestion of raw milk was common before introduction of the pasteurization process. TB in humans is mainly caused by M. tuberculosis. This bacterium is considered a genetically clonal pathogen that has coevolved with humans due to its ability to manipulate and subvert the immune response...
July 2017: Microbiology Spectrum
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