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Anthrax vaccine

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https://www.readbyqxmd.com/read/28215694/comparisons-of-the-humoral-and-cellular-immunity-induced-by-live-a16r-attenuated-spore-and-ava-like-anthrax-vaccine-in-mice
#1
Jin Lv, Ying-Ying Zhang, Xun Lu, Hao Zhang, Lin Wei, Jun Gao, Bin Hu, Wen-Wei Hu, Dun-Zhong Hu, Na Jia, Xin Feng
The live attenuated anthrax vaccine and anthrax vaccine adsorbed (AVA) are two main types of anthrax vaccines currently used in human. However, the immunoprotective mechanisms are not fully understood. In this study, we compared humoral and cellular immunity induced by live A16R spore vaccine and A16R strain derived AVA-like vaccine in mice peripheral blood, spleen and bone marrow. Both A16R spores and AVA-like vaccines induced a sustained IgG antibody response with IgG1/IgG2b subtype dominance. However, A16R spores vaccine induced higher titer of IgG2a compared with AVA-like vaccine, indicating a stronger Th1 response to A16R spores...
February 16, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/28146366/cdc-s-evolving-approach-to-emergency-response
#2
Stephen C Redd, Thomas R Frieden
The Centers for Disease Control and Prevention (CDC) transformed its approach to preparing for and responding to public health emergencies following the anthrax attacks of 2001. The Office of Public Health Preparedness and Response, an organizational home for emergency response at CDC, was established, and 4 programs were created or greatly expanded after the anthrax attacks: (1) an emergency management program, including an Emergency Operations Center; (2) increased support of state and local health department efforts to prepare for emergencies; (3) a greatly enlarged Strategic National Stockpile of medicines, vaccines, and medical equipment; and (4) a regulatory program to assure that work done on the most dangerous pathogens and toxins is done as safely and securely as possible...
January 2017: Health Security
https://www.readbyqxmd.com/read/28137237/model-systems-for-pulmonary-infectious-diseases-paradigms-of-anthrax-and-tuberculosis
#3
Gunjan Arora, Richa Misra, Andaleeb Sajid
Robert Koch utilized animal model systems to put forward his postulates while discovering the etiological agents of anthrax and tuberculosis, Bacillus anthracis and Mycobacterium tuberculosis, respectively. After more than 130 years, we have achieved limited success towards understanding these two pestilences, which have propagated as scourge against humans. B. anthracis and M. tuberculosis are diverse organisms, which share a common evolutionary path in tropics. They adapt unique strategies to overcome unfavorable conditions and surpass the host defense mechanisms...
January 30, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28117174/stability-and-pre-formulation-development-of-a-plant-produced-anthrax-vaccine-candidate
#4
R Mark Jones, Michael Burke, Devon Dubose, Jessica A Chichester, Slobodanka Manceva, April Horsey, Stephen J Streatfield, Jeff Breit, Vidadi Yusibov
Second generation anthrax vaccines focus on the use of recombinant protective antigen (rPA) to elicit a strong, toxin neutralizing antibody responses in immunized subjects. The main difference between the rPA vaccines compared to the current licensed vaccine, anthrax vaccine absorbed (AVA), is the rPA vaccines are highly purified preparations of only rPA. These second generation rPA vaccines strive to elicit strong immune responses with substantially fewer doses than AVA while provoking less side effects. Many of the rPA candidates have shown to be effective in pre-clinical studies, but most of the second generation molecules have stability issues which reduce their efficacy over time...
January 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28115677/modeling-the-ecological-niche-of-bacillus-anthracis-to-map-anthrax-risk-in-kyrgyzstan
#5
Jason K Blackburn, Saitbek Matakarimov, Sabira Kozhokeeva, Zhyldyz Tagaeva, Lindsay K Bell, Ian T Kracalik, Asankadyr Zhunushov
Anthrax, caused by the environmental bacterium Bacillus anthracis, is an important zoonosis nearly worldwide. In Central Asia, anthrax represents a major veterinary and public health concern. In the Republic of Kyrgyzstan, ongoing anthrax outbreaks have been reported in humans associated with handling infected livestock and contaminated animal by-products such as meat or hides. The current anthrax situation has prompted calls for improved insights into the epidemiology, ecology, and spatial distribution of the disease in Kyrgyzstan to better inform control and surveillance...
January 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28073730/2014-anthrax-epidemic-in-koubia-prefecture-guinea-conakry
#6
M S Sow, M B Boushab, H Balde, A Camara, F B Sako, F A Traoré, M O S Diallo, M D Diallo, M Keita, A O Sylla, T M Tounkara, M Cissé
Anthrax disease is an anthropozoonosis caused by a Gram-positive bacterium, Bacillus anthracis. Our objective was to describe the epidemiological, clinical and therapeutic features of the 2014 epidemic in Koubia prefecture. This retrospective study examined all of the anthrax cases reported in Fafaya, Koubia Prefecture. In March and April 2014, there were 39 cases of human anthrax reported, for an incidence of 1.135%. The mean age was 20.9 (± 18.3) with a sex ratio of 2.54 (28/11) in favor of men. Seventy-six percent (23/39) were single...
November 1, 2016: Médecine et Santé Tropicales
https://www.readbyqxmd.com/read/28007853/genome-sequence-of-the-soviet-russian-bacillus-anthracis-vaccine-strain-55-vniivvim
#7
Jason Farlow, Adam Kotorashvili
Bacillus anthracis strain 55-VNIIVViM is a live-attenuated nonencapsulated Soviet/Russian veterinary anthrax vaccine strain. We report here the genome of 55-VNIIVViM and confirm its phylogenetic placement in the global population structure of B. anthracis.
December 22, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27960239/histopathology-of-vaccine-preventable-diseases
#8
REVIEW
Isaac H Solomon, Danny A Milner
The widespread use of vaccines has been one of the most important medical advances in the last century, saving trillions of dollars and millions of lives. Despite local eradication of some infections, travellers returning from affected areas may cause outbreaks through reintroduction of pathogens to individuals who are unable to receive vaccines for medical reasons or who have declined vaccination for non-medical reasons. Infections that would otherwise be uncommonly encountered by anatomical pathologists should therefore remain in the differential diagnosis for immunocompromised and unvaccinated patients...
January 2017: Histopathology
https://www.readbyqxmd.com/read/27915984/structure-function-and-evolution-of-clostridium-botulinum-c2-and-c3-toxins-insight-to-poultry-and-veterinary-vaccines
#9
P Chellapandi, A Prisilla
Clostridium botulinum group III strains are able to produce cytotoxins, C2 toxin and C3 exotoxin, along with botulinum neurotoxin types C and D. C2 toxin and C3 exotoxin produced from this organism are the most important members of bacterial ADP-ribosyltransferase superfamily. Both toxins have distinct pathophysiological functions in the avian and mammalian hosts. The members of this superfamily transfer an ADP-ribose moiety of NAD+ to specific eukaryotic target proteins. The present review describes the structure, function and evolution aspects of these toxins with a special emphasis to the development of veterinary vaccines...
December 1, 2016: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/27898235/postexposure-prophylaxis-after-possible-anthrax-exposure-adherence-and-adverse-events
#10
Leisha D Nolen, Rita M Traxler, Grishma A Kharod, Pallavi A Kache, Stefan Katharios-Lanwermeyer, Katherine A Hendricks, Sean V Shadomy, William A Bower, Dana Meaney-Delman, Henry T Walke
Anthrax postexposure prophylaxis (PEP) was recommended to 42 people after a laboratory incident that involved potential aerosolization of Bacillus anthracis spores in 2 laboratories at the Centers for Disease Control and Prevention in 2014. At least 31 (74%) individuals who initiated PEP did not complete either the recommended 60 days of antimicrobial therapy or the 3-dose vaccine regimen. Among the 29 that discontinued the antimicrobial component of PEP, most (38%) individuals discontinued PEP because of their low perceived risk of infection; 9 (31%) individuals discontinued prophylaxis due to PEP-related minor adverse events, and 10% cited both low risk and adverse events as their reason for discontinuation...
November 2016: Health Security
https://www.readbyqxmd.com/read/27893966/vaccination-via-chloroplast-genetics-affordable-protein-drugs-for-the-prevention-and-treatment-of-inherited-or-infectious-human-diseases
#11
Henry Daniell, Hui-Ting Chan, Elise K Pasoreck
Plastid-made biopharmaceuticals treat major metabolic or genetic disorders, including Alzheimer's, diabetes, hypertension, hemophilia, and retinopathy. Booster vaccines made in chloroplasts prevent global infectious diseases, such as tuberculosis, malaria, cholera, and polio, and biological threats, such as anthrax and plague. Recent advances in this field include commercial-scale production of human therapeutic proteins in FDA-approved cGMP facilities, development of tags to deliver protein drugs to targeted human cells or tissues, methods to deliver precise doses, and long-term stability of protein drugs at ambient temperature, maintaining their efficacy...
November 23, 2016: Annual Review of Genetics
https://www.readbyqxmd.com/read/27874231/stability-of-domain-4-of-the-anthrax-toxin-protective-antigen-and-the-effect-of-the-vwa-domain-of-cmg2-on-stability
#12
Sireesha Mamillapalli, Masaru Miyagi, James G Bann
The major immunogenic component of the current anthrax vaccine, anthrax vaccine adsorbed (AVA) is protective antigen (PA). We have shown recently that the thermodynamic stability of PA can be significantly improved by binding to the Von-Willebrand factor A (VWA) domain of capillary morphogenesis protein 2 (CMG2), and improvements in thermodynamic stability may improve storage and long-term stability of PA for use as a vaccine. In order to understand the origin of this increase in stability, we have isolated the receptor binding domain of PA, domain 4 (D4), and have studied the effect of the addition of CMG2 on thermodynamic stability...
February 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/27792416/licensure-strategy-for-pre-and-post-exposure-prophylaxis-of-biothrax-vaccine-the-first-vaccine-licensed-using-the-fda-animal-rule
#13
Janice Longstreth, Mario H Skiadopoulos, Robert J Hopkins
The availability of a licensed anthrax vaccine that is safe, effective, and easy to administer for both pre- and post-exposure prophylaxis is critical to successfully manage and prevent potential anthrax attacks. BioThrax® (Anthrax Vaccine Adsorbed; AVA) is the only licensed anthrax vaccine in the US. Areas Covered: Recent licensed improvements to BioThrax vaccine for pre-exposure prophylaxis (PrEP) have included an intramuscular (IM) five-dose schedule (in 2008) and a three-dose IM primary series at 0, 1 and 6 months (in 2012)...
October 28, 2016: Expert Review of Vaccines
https://www.readbyqxmd.com/read/27775159/a-dual-purpose-universal-influenza-vaccine-candidate-confers-protective-immunity-against-anthrax
#14
Maria T Arévalo, Junwei Li, Diana Diaz-Arévalo, Yanping Chen, Ashley Navarro, Lihong Wu, Yongyong Yan, Mingtao Zeng
Preventive influenza vaccines must be reformulated annually because of antigen shift and drift of circulating influenza viral strains. However, seasonal vaccines do not always match the circulating strains, and there is the ever-present threat that avian influenza viruses may adapt to humans. Hence, a universal influenza vaccine is needed to provide protective immunity against a broad range of influenza viruses. We designed an influenza antigen consisting of three tandem M2e repeats plus HA2, in combination with a detoxified anthrax oedema toxin delivery system (EFn plus PA) to enhance immune responses...
March 2017: Immunology
https://www.readbyqxmd.com/read/27753574/anthrax-vaccine-and-the-risk-of-rheumatoid-arthritis-and-systemic-lupus-erythematosus-in-the-u-s-military-a-case-control-study
#15
Barbara H Bardenheier, Jonathan Duffy, Susan K Duderstadt, Jay B Higgs, Michael P Keith, Patricia J Papadopoulos, William R Gilliland, Michael M McNeil
U.S. military personnel assigned to areas deemed to be at high risk for anthrax attack receive Anthrax Vaccine Adsorbed (AVA). Few cases of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) have been reported in persons who received AVA. Using a matched case-control study design, we assessed the relationship of RA and SLE with AVA vaccination using the Defense Medical Surveillance System. We identified potential cases using International Classification of Diseases, 9th Revision, Clinical Modification codes and confirmed cases with medical record review and rheumatologist adjudication...
October 2016: Military Medicine
https://www.readbyqxmd.com/read/27677796/a-bacillus-anthracis-genome-sequence-from-the-sverdlovsk-1979-autopsy-specimens
#16
Jason W Sahl, Talima Pearson, Richard Okinaka, James M Schupp, John D Gillece, Hannah Heaton, Dawn Birdsell, Crystal Hepp, Viacheslav Fofanov, Ramón Noseda, Antonio Fasanella, Alex Hoffmaster, David M Wagner, Paul Keim
: Anthrax is a zoonotic disease that occurs naturally in wild and domestic animals but has been used by both state-sponsored programs and terrorists as a biological weapon. A Soviet industrial production facility in Sverdlovsk, USSR, proved deficient in 1979 when a plume of spores was accidentally released and resulted in one of the largest known human anthrax outbreaks. In order to understand this outbreak and others, we generated a Bacillus anthracis population genetic database based upon whole-genome analysis to identify all single-nucleotide polymorphisms (SNPs) across a reference genome...
2016: MBio
https://www.readbyqxmd.com/read/27673328/development-of-an-acid-resistant-salmonella-typhi-ty21a-attenuated-vector-for-improved-oral-vaccine-delivery
#17
Madushini N Dharmasena, Catherine M Feuille, Carly Elizabeth C Starke, Arvind A Bhagwat, Scott Stibitz, Dennis J Kopecko
The licensed oral, live-attenuated bacterial vaccine for typhoid fever, Salmonella enterica serovar Typhi strain Ty21a, has also been utilized as a vaccine delivery platform for expression of diverse foreign antigens that stimulate protection against shigellosis, anthrax, plague, or human papilloma virus. However, Ty21a is acid-labile and, for effective oral immunization, stomach acidity has to be either neutralized with buffer or by-passed with Ty21a in an enteric-coated capsule (ECC). Several studies have shown that efficacy is reduced when Ty21a is administered in an ECC versus as a buffered liquid formulation, the former limiting exposure to GI tract lymphoid tissues...
2016: PloS One
https://www.readbyqxmd.com/read/27647868/progress-toward-the-development-of-a-neat-protein-vaccine-for-anthrax-disease
#18
Miriam A Balderas, Chinh T Q Nguyen, Austen Terwilliger, Wendy A Keitel, Angelina Iniguez, Rodrigo Torres, Frederico Palacios, Celia W Goulding, Anthony W Maresso
Bacillus anthracis is a sporulating Gram-positive bacterium that is the causative agent of anthrax and a potential weapon of bioterrorism. The U.S.-licensed anthrax vaccine is made from an incompletely characterized culture supernatant of a nonencapsulated, toxigenic strain (anthrax vaccine absorbed [AVA]) whose primary protective component is thought to be protective antigen (PA). AVA is effective in protecting animals and elicits toxin-neutralizing antibodies in humans, but enthusiasm is dampened by its undefined composition, multishot regimen, recommended boosters, and potential for adverse reactions...
December 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27599605/plant-based-vaccines-against-respiratory-diseases-current-status-and-future-prospects
#19
Verónica A Márquez-Escobar, Sergio Rosales-Mendoza, Josué I Beltrán-López, Omar González-Ortega
INTRODUCTION: Respiratory infections have an enormous, worldwide epidemiologic impact on humans and animals. Among the prophylactic measures, vaccination has the potential to neutralize this impact. New technologies for vaccine production and delivery are of importance in this field since they offer the potential to develop new immunization approaches overriding the current limitations that comprise high cost, safety issues, and limited efficacy. AREAS COVERED: In the present review, the state of the art in developing plant-based vaccines against respiratory diseases is presented...
September 6, 2016: Expert Review of Vaccines
https://www.readbyqxmd.com/read/27594343/acetalated-dextran-microparticulate-vaccine-formulated-via-coaxial-electrospray-preserves-toxin-neutralization-and-enhances-murine-survival-following-inhalational-bacillus-anthracis-exposure
#20
Matthew D Gallovic, Kevin L Schully, Matthew G Bell, Margaret A Elberson, John R Palmer, Christian A Darko, Eric M Bachelder, Barbara E Wyslouzil, Andrea M Keane-Myers, Kristy M Ainslie
Subunit formulations are regarded as the safest type of vaccine, but they often contain a protein-based antigen that can result in significant challenges, such as preserving antigenicity during formulation and administration. Many studies have demonstrated that encapsulation of protein antigens in polymeric microparticles (MPs) via emulsion techniques results in total IgG antibody titers comparable to alum formulations, however, the antibodies themselves are non-neutralizing. To address this issue, a coaxial electrohydrodynamic spraying (electrospray) technique is used to formulate a microparticulate-based subunit anthrax vaccine under conditions that minimize recombinant protective antigen (rPA) exposure to harsh solvents and high shear stress...
September 5, 2016: Advanced Healthcare Materials
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