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https://www.readbyqxmd.com/read/29332140/identification-of-cross-reactive-antigens-of-c-botulinum-types-a-b-e-f-by-immunoproteomic-approach
#1
Arti Sharma, Sarkaraisamy Ponmariappan, Rani Sarita, Syed Imtiaz Alam, Dev Vrat Kamboj, Sangeeta Shukla
Diseases triggered by microorganisms can be controlled by vaccines, which need neutralizing antigens. Hence, it is very crucial to identify extremely efficient immunogens for immune prevention. Botulism, a fatal neuroparalytic disease, is caused by botulinum neurotoxins produced by the anaerobic, Gram-positive spore-forming bacteria, Clostridium botulinum. Food-borne botulism and iatrogenic botulism are caused by botulinum toxin. Wound botulism, infant botulism, and adult intestinal botulism are caused by primarily C...
January 13, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29327957/unusual-outbreak-of-fatal-clostridiosis-in-a-group-of-captive-brown-pelicans-pelecanus-occidentalis
#2
Imke Lueders, Carsten Ludwig, Johanna Kasberg, Christoph Georg Baums, Kerstin Klimke, Martin B Dorner, Dana Ströse, Volker Schmidt
Fatal clostridial infections and clostridial toxicoses are common in birds. Most fatalities are associated with toxin production and progress rapidly, often within 24 hours of infection. We describe an unusual and protracted course of disease in 6 captive brown pelicans ( Pelecanus occidentalis), which was believed to result from toxicosis by toxovar A produced by a mixed infection with Clostridium sordellii and Clostridium perfringens. Although the first death in the group occurred 3 days after signs of illness were documented, the remaining birds died over a 38-day period despite aggressive antibiotic and supportive therapy...
December 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/29307477/enhancing-toxin-based-vaccines-against-botulism
#3
Amanda Przedpelski, William H Tepp, Madison Zuverink, Eric A Johnson, Sabine Pellet, Joseph T Barbieri
Botulinum neurotoxins (BoNT) are the most toxic proteins for humans. BoNTs are single chain proteins with an N-terminal light chain (LC) and a C-terminal heavy chain (HC). HC comprises a translocation domain (HCN) and a receptor binding domain (HCC). Currently, there are no approved vaccines against botulism. This study tests a recombinant, full-length BoNT/A1 versus LCHCN/A1 and HCC/A1 as vaccine candidates against botulism. Recombinant, full-length BoNT/A1 was detoxified by engineering 3-amino acid mutations (E224A/R363A/Y366F) (M-BoNT/A1) into the LC to eliminate catalytic activity, which reduced toxicity in a mouse model of botulism by >106-fold relative to native BoNT/A1...
January 4, 2018: Vaccine
https://www.readbyqxmd.com/read/29301587/foodborne-botulism-due-to-ingestion-of-home-canned-green-beans-two-case-reports
#4
Dorothea Hellmich, Katja E Wartenberg, Stephan Zierz, Tobias J Mueller
BACKGROUND: Foodborne botulism is a life-threatening, rapidly progressive disease. It has an incidence of less than 10 cases per year in Germany and mostly affects several previously healthy people at the same time. The only specific treatment is the administration of botulism antitoxin. According to the German guidelines administration of antitoxin is recommended only in the first 24 hours after oral ingestion of the toxin. CASE PRESENTATION: A 47-year-old white woman and her 51-year-old white husband presented with paralysis of multiple cranial nerves and rapidly descending paralysis approximately 72 hours after ingestion of home-canned beans...
January 4, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29288126/high-resolution-crystal-structures-of-clostridium-botulinum-neurotoxin-a3-and-a4-binding-domains
#5
Jonathan Davies, Jay Rees, Sai Man Liu, K Ravi Acharya
Clostridium botulinum neurotoxins (BoNTs) cause the life-threatening condition, botulism. However, while they have the potential to cause serious harm, they are increasingly being utilised for therapeutic applications. BoNTs comprise of seven distinct serotypes termed BoNT/A through BoNT/G, with the most widely characterised being sub-serotype BoNT/A1. Each BoNT consists of three structurally distinct domains, a binding domain (HC), a translocation domain (HN), and a proteolytic domain (LC). The HC domain is responsible for the highly specific targeting of the neurotoxin to neuronal cell membranes...
December 26, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/29287670/investigation-of-clostridium-botulinum-group-iii-s-mobilome-content
#6
Cédric Woudstra, Caroline Le Maréchal, Rozenn Souillard, Fabrizio Anniballi, Bruna Auricchio, Luca Bano, Marie-Hélène Bayon-Auboyer, Miriam Koene, Isabelle Mermoud, Roseane B Brito, Francisco C F Lobato, Rodrigo O S Silva, Martin B Dorner, Patrick Fach
Clostridium botulinum group III is mainly responsible for botulism in animals. It could lead to high animal mortality rates and, therefore, represents a major environmental and economic concern. Strains of this group harbor the botulinum toxin locus on an unstable bacteriophage. Since the release of the first complete C. botulinum group III genome sequence (strain BKT015925), strains have been found to contain others mobile elements encoding for toxin components. In this study, seven assays targeting toxin genes present on the genetic mobile elements of C...
December 26, 2017: Anaerobe
https://www.readbyqxmd.com/read/29281807/spore-forming-bacteria-infections-and-people-who-inject-drugs-implications-for-harm-reduction
#7
Karen Dunleavy, Alison Munro, Kirsty Roy, Sharon Hutchinson, Norah Palmateer, Tony Knox, David Goldberg, Vivian Hope, John Campbell, Emma Hamilton, David Liddell, Gillian Penrice, Avril Taylor
BACKGROUND: There is no research on public health interventions that alert people who inject drugs (PWID) to clusters/outbreaks of severe bacterial infections. In Scotland, during the botulism cluster/outbreak of Dec 2014-July 2015 harm reduction (HR) messages detailed on a postcard (Botulism Postcard) were distributed to PWID between Feb-April 2015. We examined the impact of the Botulism Postcard on cluster/outbreak awareness, healthcare seeking and HR behaviours among PWID; and their views on such clusters/outbreaks...
December 24, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/29277396/botulism-in-the-icu-nursing-care-plan
#8
G Zariquiey-Esteva, D Galeote-Cózar, P Santa-Candela, A Castanera-Duro
INTRODUCTION AND CASE EVALUATION: Botulism is a rare disease in Europe, caused by the bacterium Clostridium botulinum, notifiable, non-transmissible person-to-person and potentially fatal (between 5 and 10%) if not treated quickly. The favourable opinion of the Clinical Research Ethics Committee was obtained. We present the nursing care plan of a 49-year-old man with a diagnosis of bacterial intoxication caused by Clostridium botulinum, secondary to ingestion of beans in poor condition, who was admitted to the ICU for a total of 35 days...
December 22, 2017: Enfermería Intensiva
https://www.readbyqxmd.com/read/29257047/high-conservation-of-tetanus-and-botulinum-neurotoxins-cleavage-sites-on-human-snare-proteins-suggests-that-these-pathogens-exerted-little-or-no-evolutionary-pressure-on-humans
#9
Stefan Carle, Marco Pirazzini, Ornella Rossetto, Holger Barth, Cesare Montecucco
The Genome Aggregation Database presently contains >120,000 human genomes. We searched in this database for the presence of mutations at the sites of tetanus (TeNT) and botulinum neurotoxins (BoNTs) cleavages of the three SNARE proteins: VAMP, SNAP-25 and Syntaxin. These mutations could account for some of the BoNT/A resistant patients. At the same time, this approach was aimed at testing the possibility that TeNT and BoNT may have acted as selective agents in the development of resistance to tetanus or botulism...
December 19, 2017: Toxins
https://www.readbyqxmd.com/read/29236288/disaster-preparedness-biological-threats-and-treatment-options
#10
Navaneeth Narayanan, Clifton R Lacy, Joseph E Cruz, Meghan Nahass, Jonathan Karp, Joseph A Barone, Evelyn Hermes-DeSantis
Biological disasters can be natural, accidental, or intentional. Biological threats have made a lasting impact on civilization. This review will focus on agents of clinical significance, bioterrorism, and national security; specifically Category A agents (anthrax, botulism, plague, tularemia, and smallpox), as well as briefly discuss other naturally-emerging infections of public health significance including Ebola virus (also a Category A agent) and Zika virus. The role of the pharmacist in disaster preparedness and disaster response is multifaceted and important...
December 13, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/29229452/efficacy-of-human-botulism-immune-globulin-for-the-treatment-of-infant-botulism-the-first-12-years-post-licensure
#11
Jessica R Payne, Jessica M Khouri, Nicholas P Jewell, Stephen S Arnon
OBJECTIVES: To report the efficacy of Human Botulism Immune Globulin Intravenous (BIG-IV) in the first 12 years following its licensure in 2003 and to characterize its use nationwide in treating patients with infant botulism. STUDY DESIGN: Medical records and billing information were collected for US patients treated with BIG-IV from 2003 to 2015. Length of hospital stay (LOS) and hospital charge information for treated patients were compared with the BIG-IV Pivotal Clinical Trial Placebo Group to quantify decreases in LOS and hospital charges...
December 8, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29229451/more-clinical-mimics-of-infant-botulism
#12
Jessica M Khouri, Jessica R Payne, Stephen S Arnon
OBJECTIVE: To ascertain the actual diagnoses of 76 patients (2005-2015) whose clinical presentations so closely resembled infant botulism that the patients were treated with Human Botulism Immune Globulin Intravenous (BIG-IV; BabyBIG), but whose illnesses subsequently were not laboratory confirmed as infant botulism ("clinical mimics" of infant botulism). STUDY DESIGN: The California Department of Public Health produces BIG-IV and distributes it nationwide as a public service (ie, not-for-profit) orphan drug to treat patients hospitalized with suspected infant botulism...
December 8, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29182078/foodborne-botulism-in-poland-in-2015
#13
Michał Czerwiński, Mirosław P Czarkowski, Barbara Kondej
OBJECTIVE: The aim of this article is to assess the epidemiology of foodborne botulism in Poland in 2015 compared to previous years MATERIALS AND METHODS: We reviewed (1) national surveillance data published in the annual bulletin “Infectious diseases and poisonings in Poland in 2015” and in previous publications, and (2) unpublished data retrieved from botulism case reports for 2015 sent from Sanitary-Epidemiological Stations to the Department of Epidemiology NIPH-NIH...
2017: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/29174678/an-in-vitro-cell-based-potency-assay-for-pharmaceutical-type-a-botulinum-antitoxins
#14
Amram Torgeman, Eran Diamant, Lilach Levin, Alon Ben David, Eyal Epstein, Meni Girshengorn, Ohad Mazor, Ronit Rosenfeld, Ran Zichel
Botulism therapy relies on passive immunization with antitoxin. The mouse neutralization test is the only pharmacopeia assay to measure the potency of antitoxin preparations. Herein, we present an in vitro cell-based assay for the measurement of pharmaceutical type A antitoxin potency. Accuracy, reproducibility and compatibility with the mouse bioassay were demonstrated using different batches of standard antitoxin and toxin preparations. The established assay may substantially reduce the use of laboratory animals in the process of pharmaceutical antitoxin production...
November 22, 2017: Vaccine
https://www.readbyqxmd.com/read/29173661/sacroiliac-joint-interventions
#15
REVIEW
David A Soto Quijano, Eduardo Otero Loperena
Sacroiliac joint (SIJ) pain is an important cause of lower back problems. Multiple SIJ injection techniques have been proposed over the years to help in the diagnosis and treatment of this condition. However, the SIJ innervation is complex and variable, and truly intra-articular injections are sometimes difficult to obtain. Different sacroiliac joint injections have shown to provide pain relief in patients suffering this ailment. Various techniques for intraarticular injections, sacral branch blocks and radiofrequency ablation, both fluoroscopy guided and ultrasound guided are discussed in this paper...
February 2018: Physical Medicine and Rehabilitation Clinics of North America
https://www.readbyqxmd.com/read/29166654/therapeutic-efficacy-of-equine-botulism-antitoxin-in-rhesus-macaques
#16
Shantha Kodihalli, Andrew Emanuel, Teresa Takla, Yi Hua, Charles Hobbs, Ross LeClaire, Denise C O'Donnell
BACKGROUND: There are currently no licensed vaccines available for prevention of botulism in humans. The vaccination is not desirable due to expanding therapeutic indications of botulinum toxins. The only available specific treatment for botulism is antitoxin to remove circulating toxin, thus, preventing further neuronal damage. BAT® (Botulism Antitoxin Heptavalent (A, B, C, D, E, F, G)-(Equine)) has been developed and its therapeutic efficacy evaluated against botulinum neurotoxin serotype A (BoNT/A) in Rhesus macaques...
2017: PloS One
https://www.readbyqxmd.com/read/29158500/use-dependent-potentiation-of-voltage-gated-calcium-channels-rescues-neurotransmission-in-nerve-terminals-intoxicated-by-botulinum-neurotoxin-serotype-a
#17
Phillip H Beske, Katie M Hoffman, James B Machamer, Margaret R Eisen, Patrick M McNutt
Botulinum neurotoxins (BoNTs) are highly potent toxins that cleave neuronal SNARE proteins required for neurotransmission, causing flaccid paralysis and death by asphyxiation. Currently, there are no clinical treatments to delay or reverse BoNT-induced blockade of neuromuscular transmission. While aminopyridines have demonstrated varying efficacy in transiently reducing paralysis following BoNT poisoning, the precise mechanisms by which aminopyridines symptomatically treat botulism are not understood. Here we found that activity-dependent potentiation of presynaptic voltage-gated calcium channels (VGCCs) underlies 3,4-diaminopyridine (3,4-DAP)-mediated rescue of neurotransmission in central nervous system synapses and mouse diaphragm neuromuscular junctions fully intoxicated by BoNT serotype A...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29152423/foodborne-botulism-i-only-had-nacho-cheese-a-case-report
#18
Saad A Choudhry, Muhammad Jahanzaib Anwar, Muhammad Afzal, Abdul Shah
A 32-year-old female presented to the emergency department with complaints of diplopia, followed by dyspnea, chest tightness, congestion, and dysphagia. The patient was resuscitated and initial investigations were done. Within a few hours of the admission, she started developing signs of respiratory failure and was intubated and placed on the mechanical ventilator. The patient denied any ingestion of exotic food, shellfish, raw meat, or raw fish. The patient also denied traveling to any exotic place or recent camping trips...
September 8, 2017: Curēus
https://www.readbyqxmd.com/read/29133849/canonical-germinant-receptor-is-dispensable-for-spore-germination-in-clostridium-botulinum-group-ii-strain-nctc-11219
#19
Charlien Clauwers, Cédric Lood, Vera van Noort, Chris W Michiels
Clostridium botulinum is an anaerobic sporeforming bacterium that is notorious for producing a potent neurotoxin. Spores of C. botulinum can survive mild food processing treatments and subsequently germinate, multiply, produce toxin and cause botulism. Control of spore germination and outgrowth is therefore essential for the safety of mildly processed foods. However, little is known about the process of spore germination in group II C. botulinum (gIICb), which are a major concern in chilled foods because they are psychrotrophic...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29128986/longitudinal-neurophysiological-assessment-of-intramuscular-type-a-botulin-toxin-in-healthy-humans
#20
L Lispi, L Leonardi, A Petrucci
The aim of this study is to assess the neurophysiological abnormalities of type A botulin toxin-infiltrated human muscle, and their evolution over time. Seried cMAP measurements, 3 and 20 Hz repetitive nerve stimulation, EMG, SFEMG over 3 months from toxin injection. Our findings consist in lack of decrement with 3 Hz repetitive nerve stimulation and facilitation with 20 Hz repetitive nerve stimulation; progressive increasing of jitter; early appearance of fibrillations; small and short motor unit action potential in the first 3 weeks, followed by increasing of MUAP amplitude and duration, with polyphasic morphology...
November 11, 2017: Neurological Sciences
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