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  1. Article ; Online: Changes in laboratory and clinical workload for Clostridium difficile infection from 2003 to 2007 in hospitals in Edinburgh.

    Reddy, S / Taori, S / Poxton, I R

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2010  Volume 16, Issue 4, Page(s) 340–346

    Abstract: Clostridium difficile infection (CDI) is a growing concern with regard to increases in incidence and its associated financial burden. A retrospective analysis of patients admitted to Hospitals in Edinburgh from 2003 to 2007 and tested for C. difficile ... ...

    Abstract Clostridium difficile infection (CDI) is a growing concern with regard to increases in incidence and its associated financial burden. A retrospective analysis of patients admitted to Hospitals in Edinburgh from 2003 to 2007 and tested for C. difficile toxins was performed. A total of 45 412 faecal samples were tested and 6286 (13.8%) were positive. Overall CDI was identified in 1.7 cases/1000 in-patient occupied bed days (OBD). The incidence of CDI fell from 1.98 cases/1000 OBD in 2006 to 1.48 cases/1000 OBD in 2007. Renal Medicine, including Transplant Surgery, and Intensive Care had the highest incidence, with >6.2 cases/1000 OBD each, followed by Infectious Diseases and Gastrointestinal Medicine, with rates of 5.5 and 4.42 cases/1000 OBD, respectively. Medicine of the Elderly had an incidence of 1.69 cases/1000 OBD. Incidence increased with age, from 0.45 cases/1000 OBD in the 0-20-year-old age group to 2.02 cases/1000 OBD in the 61-80-year-old age group. Twelve percent of all toxin-positive patients were transferred through a minimum of two specialties when they remained positive for C. difficile toxins. Estimated costs over the study period for toxin testing were approximately pound126 500 and the minimal potential hospitalization costs for patients with CDI was pound20 000 000. The overall incidence of patients identified with CDI fell in 2007 compared to 2006. The incidence has increased with age; however, patients in Medicine of the Elderly had a much lower incidence than in several other specialties and therefore risk assessment of CDI should also be targeted within other specialties. Judicious application of infection control measures remains important for preventing CDI.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; Clostridium Infections/diagnosis ; Clostridium Infections/epidemiology ; Clostridium difficile/isolation & purification ; Feces/microbiology ; Hospitalization/statistics & numerical data ; Humans ; Incidence ; Infant ; Infant, Newborn ; Laboratories, Hospital/statistics & numerical data ; Middle Aged ; Retrospective Studies ; Scotland/epidemiology ; Young Adult
    Language English
    Publishing date 2010-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1470-9465 ; 1198-743X
    ISSN (online) 1469-0691
    ISSN 1470-9465 ; 1198-743X
    DOI 10.1111/j.1469-0691.2010.03141.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Antibodies to lipopolysaccharide.

    Poxton, I R

    Journal of immunological methods

    1995  Volume 186, Issue 1, Page(s) 1–15

    Abstract: Lipopolysaccharides (LPS) are indispensable structural components of the Gram-negative bacterial outer membrane and are major determinants of virulence in pathogenic species. In the infected host LPS is better known as endotoxin where it acts as a potent ...

    Abstract Lipopolysaccharides (LPS) are indispensable structural components of the Gram-negative bacterial outer membrane and are major determinants of virulence in pathogenic species. In the infected host LPS is better known as endotoxin where it acts as a potent stimulator of the inflammatory response. This article reviews the methods for the production and measurement of anti-LPS antibodies, and then describes the uses to which these methods have been employed. Antibodies to LPS (either monoclonal or polyclonal) may be used directly as immunotherapeutic agents for the treatment of Gram-negative sepsis or endotoxaemia, or as probes for the diagnosis and epidemiological investigation of Gram-negative bacterial infections. Antibodies are useful tools for investigation of the chemical structure of LPS, its expression on bacteria and to study the role of LPS in pathogenic mechanisms. The detection and quantitation of anti-LPS antibodies has formed the basis of classical and more recent serological studies of major bacterial infections.
    MeSH term(s) Antibodies, Bacterial/immunology ; Antibodies, Monoclonal/immunology ; Antigens, Bacterial/immunology ; Bacteria/immunology ; Bacterial Infections/diagnosis ; Endotoxins/immunology ; Lipopolysaccharides/immunology
    Chemical Substances Antibodies, Bacterial ; Antibodies, Monoclonal ; Antigens, Bacterial ; Endotoxins ; Lipopolysaccharides
    Language English
    Publishing date 1995-10-12
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 120142-6
    ISSN 1872-7905 ; 0022-1759
    ISSN (online) 1872-7905
    ISSN 0022-1759
    DOI 10.1016/0022-1759(95)00123-r
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Humoral immune response as predictor of recurrence in Clostridium difficile infection.

    Bauer, M P / Nibbering, P H / Poxton, I R / Kuijper, E J / van Dissel, J T

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2014  Volume 20, Issue 12, Page(s) 1323–1328

    Abstract: Low serum concentrations of antibodies directed against the toxins TcdA and TcdB have been associated with a higher risk of recurrence of Clostridium difficile infection (CDI) after successful antibiotic treatment. However, there are conflicting reports. ...

    Abstract Low serum concentrations of antibodies directed against the toxins TcdA and TcdB have been associated with a higher risk of recurrence of Clostridium difficile infection (CDI) after successful antibiotic treatment. However, there are conflicting reports. Herein, we compared serum levels of antibodies of patients with a single episode of CDI with those of patients who subsequently suffered a recurrence. We used a serum bank from patients who received an experimental whey protein product following successful antibiotic treatment for CDI. We determined levels of IgA and IgG directed against TcdA, TcdB and non-toxin cell surface antigens in serum collected directly and 3 weeks after completing a 10-day course of antibiotic treatment for CDI. We also developed an objective flow cytometry-based assay to determine the proportion of cells exhibiting cytopathic effect after exposure to TcdB. Using this method, we measured the TcdB-neutralizing capacity of sera. We compared the results for patients without a subsequent recurrence with those of patients who suffered a recurrence within 60 days after completing the antibiotic treatment. Advanced age, comorbidity other than immunocompromised state and low serum levels of anti-TcdA and anti-TcdB antibodies were associated with recurrence, whereas serum levels of antibodies directed against cell surface antigens were not. Serum TcdB-neutralizing capacity, which correlated only weakly with serum IgG anti-TcdB, was not significantly associated with recurrence.
    MeSH term(s) Aged ; Aged, 80 and over ; Antibodies, Bacterial/blood ; Antigens, Bacterial/immunology ; Bacterial Toxins/immunology ; Bacterial Toxins/toxicity ; Cell Survival/drug effects ; Clostridium Infections/epidemiology ; Clostridium Infections/immunology ; Clostridium difficile/immunology ; Cohort Studies ; Female ; Flow Cytometry/methods ; Humans ; Immunity, Humoral ; Immunoglobulin A/blood ; Immunoglobulin G/blood ; Male ; Middle Aged ; Prospective Studies ; Recurrence ; Risk Factors
    Chemical Substances Antibodies, Bacterial ; Antigens, Bacterial ; Bacterial Toxins ; Immunoglobulin A ; Immunoglobulin G
    Language English
    Publishing date 2014-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1470-9465 ; 1198-743X
    ISSN (online) 1469-0691
    ISSN 1470-9465 ; 1198-743X
    DOI 10.1111/1469-0691.12769
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Prokaryote envelope diversity.

    Poxton, I R

    The Journal of applied bacteriology

    1993  Volume 74 Suppl, Page(s) 1S–11S

    MeSH term(s) Bacteria/ultrastructure ; Bacterial Physiological Phenomena ; Carbohydrate Sequence ; Cell Membrane/physiology ; Cell Membrane/ultrastructure ; Cell Wall/physiology ; Cell Wall/ultrastructure ; Molecular Sequence Data
    Language English
    Publishing date 1993
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 218061-3
    ISSN 0021-8847
    ISSN 0021-8847
    DOI 10.1111/j.1365-2672.1993.tb04337.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A survey of the identification and susceptibility testing of anaerobes in diagnostic microbiology laboratories in Scotland, UK.

    Smith, A J / Lockhart, D E A / Tyers, A / Poxton, I R

    The Journal of antimicrobial chemotherapy

    2010  Volume 65, Issue 4, Page(s) 805

    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Bacteria, Anaerobic/drug effects ; Bacteria, Anaerobic/isolation & purification ; Bacterial Infections/diagnosis ; Bacteriological Techniques/methods ; Humans ; Scotland
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2010-04
    Publishing country England
    Document type Letter
    ZDB-ID 191709-2
    ISSN 1460-2091 ; 0305-7453
    ISSN (online) 1460-2091
    ISSN 0305-7453
    DOI 10.1093/jac/dkq010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Systemic antibodies to Clostridium botulinum type C: do they protect horses from grass sickness (dysautonomia)?

    Hunter, L C / Poxton, I R

    Equine veterinary journal

    2001  Volume 33, Issue 6, Page(s) 547–553

    Abstract: The aetiology of equine grass sickness (EGS) is still unknown. There is increasing evidence that toxicoinfection with Clostridium botulinum type C is involved. Epidemiological evidence shows that resistance to EGS can occur in older horses and those that ...

    Abstract The aetiology of equine grass sickness (EGS) is still unknown. There is increasing evidence that toxicoinfection with Clostridium botulinum type C is involved. Epidemiological evidence shows that resistance to EGS can occur in older horses and those that have been on a particular pasture for longer or have been in prior contact with the disease. This resistance may be in the form of an immune response to the aetiological agent. Levels of systemic antibodies to the surface antigens of C. botulinum type C (using the closely related and safe C. novyi type A as a phenotypic marker) and to the botulinum type C neurotoxin (BoNT/C) were investigated in horses with and without EGS. Horses with grass sickness were found to have significantly lower levels of systemic IgG to both surface antigens and BoNT/C. Horses with low levels of systemic immunity to these antigens may be more susceptible to developing EGS. There were no significant differences in antibody levels between the different categories of EGS, suggesting systemic immunity to C. botulinum type C does not play a significant role in influencing the severity of the disease. However, horses that had been in contact with EGS or that were grazing land where it had occurred frequently in the past had significantly higher antibody levels to these antigens. These horses may have been exposed to subclinical doses of C. botulinum type C and BoNT/C, resulting in the production of a protective immune response against the putative aetiological agent. This finding is of potential significance for the prospect of prevention of EGS by vaccination against C. botulinum type C.
    MeSH term(s) Age Factors ; Animals ; Antibodies, Bacterial/blood ; Antibodies, Bacterial/immunology ; Antigens, Surface/blood ; Autonomic Nervous System Diseases/microbiology ; Autonomic Nervous System Diseases/veterinary ; Botulinum Toxins/immunology ; Clostridium botulinum/immunology ; Clostridium botulinum/pathogenicity ; Enzyme-Linked Immunosorbent Assay/veterinary ; Horse Diseases/etiology ; Horse Diseases/microbiology ; Horse Diseases/prevention & control ; Horses ; Immunoglobulin G/blood ; Plant Poisoning/prevention & control ; Plant Poisoning/veterinary ; Poaceae/poisoning
    Chemical Substances Antibodies, Bacterial ; Antigens, Surface ; Immunoglobulin G ; Botulinum Toxins (EC 3.4.24.69) ; botulinum toxin type C (FPM7829VMX)
    Language English
    Publishing date 2001-11-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 41606-x
    ISSN 0425-1644
    ISSN 0425-1644
    DOI 10.2746/042516401776563418
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Immunoblotting techniques.

    Poxton, I R

    Current opinion in immunology

    1989  Volume 2, Issue 6, Page(s) 905–909

    MeSH term(s) Antigens/isolation & purification ; Autoimmune Diseases/immunology ; HIV Antibodies/analysis ; Humans ; Hypersensitivity/immunology ; Immunoblotting/methods ; Proteins/isolation & purification
    Chemical Substances Antigens ; HIV Antibodies ; Proteins
    Language English
    Publishing date 1989
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1035767-1
    ISSN 1879-0372 ; 0952-7915
    ISSN (online) 1879-0372
    ISSN 0952-7915
    DOI 10.1016/0952-7915(89)90176-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: The lipopolysaccharide core type of Escherichia coli O157:H7 and other non-O157 verotoxin-producing E. coli.

    Currie, C G / Poxton, I R

    FEMS immunology and medical microbiology

    1999  Volume 24, Issue 1, Page(s) 57–62

    Abstract: A mouse monoclonal antibody specific for the R3 lipopolysaccharide core type of Escherichia coli was used to determine the core type of E. coli O157:H7 and other non-O157 verotoxin-producing E. coli strains. Lipopolysaccharide extracts from 28 clinical ... ...

    Abstract A mouse monoclonal antibody specific for the R3 lipopolysaccharide core type of Escherichia coli was used to determine the core type of E. coli O157:H7 and other non-O157 verotoxin-producing E. coli strains. Lipopolysaccharide extracts from 28 clinical isolates were examined by sodium dodecylsulfate-polyacrylamide gel electrophoresis and immunoblotting and all were found to have the R3 core. None of the core lipopolysaccharide from the strains tested reacted with the control R1 and R2 specific monoclonal antibodies. A common core type between all the verotoxin-producing E. coli strains tested may be significant when considering the immune response to these bacteria, and to the receptor for the VT bacteriophage.
    MeSH term(s) Animals ; Antibodies, Monoclonal ; Antibody Specificity/immunology ; Antigens, Bacterial/immunology ; Blotting, Western ; Escherichia coli/chemistry ; Escherichia coli O157/chemistry ; Humans ; Lipopolysaccharides/chemistry ; Mice
    Chemical Substances Antibodies, Monoclonal ; Antigens, Bacterial ; Lipopolysaccharides
    Language English
    Publishing date 1999-05
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1143208-1
    ISSN 1574-695X ; 0928-8244
    ISSN (online) 1574-695X
    ISSN 0928-8244
    DOI 10.1111/j.1574-695X.1999.tb01265.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Comparative proteomic analysis of Clostridium difficile isolates of varying virulence.

    Chilton, C H / Gharbia, S E / Fang, M / Misra, R / Poxton, I R / Borriello, S P / Shah, H N

    Journal of medical microbiology

    2014  Volume 63, Issue Pt 4, Page(s) 489–503

    Abstract: The soluble proteome of three Clostridium difficile strains of varying pathogenic potential, designated B-1, Tra 5/5 and 027 SM, were compared using differential in-gel electrophoresis in which the proteins of each strain were labelled with CyDyes. This ... ...

    Abstract The soluble proteome of three Clostridium difficile strains of varying pathogenic potential, designated B-1, Tra 5/5 and 027 SM, were compared using differential in-gel electrophoresis in which the proteins of each strain were labelled with CyDyes. This enabled visual inspection of the 2D profiles of strains and identification of differentially expressed proteins using image analysis software. Unlabelled protein reference maps of the predominant proteins were then generated for each strain using 2D gel electrophoresis followed by protein sequencing of each spot using a Reflectron matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometer. Increased coverage of the proteome was achieved using 1D gel electrophoresis in a bottom-up approach using LC-MS/MS of 1 cm gel slices. A total of 888 different proteins were detected by comparative analysis of isolates grown in parallel for 64 h on blood agar plates. Of these, only 38 % were shared between all isolates. One hundred and ten proteins were identified as showing ≥2-fold difference in expression between strains. Differential expression was shown in a number of potential virulence and colonization factors. Toxin B was detected in the more virulent strains B-1 and 027 SM, but not in the lower virulent strain Tra 5/5, despite all strains possessing an intact pathogenicity locus. The S-layer protein (Cwp2) was identified in strains 027 SM and Tra 5/5 but not strain B-1, and differences in the post-translational modification of SlpA were noted for strain B-1. The variant S-layer profile of strain B-1 was confirmed by genomic comparison, which showed a 58 kb insertion in the S-layer operon of strain B-1. Differential post-translation modification events were also noted in flagellar proteins, thought to be due to differential glycosylation. This study highlights genomic and proteomic variation of different Clostridium difficile strains and suggests a number of factors may play a role in mediating the varying virulence of these different strains.
    MeSH term(s) Bacterial Proteins/analysis ; Clostridium Infections/microbiology ; Clostridium Infections/pathology ; Clostridium difficile/chemistry ; Clostridium difficile/isolation & purification ; Clostridium difficile/pathogenicity ; Electrophoresis, Gel, Two-Dimensional ; Genetic Variation ; Humans ; Image Processing, Computer-Assisted ; Proteome/analysis ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; Staining and Labeling
    Chemical Substances Bacterial Proteins ; Proteome
    Language English
    Publishing date 2014-01-20
    Publishing country England
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 218356-0
    ISSN 1473-5644 ; 0022-2615
    ISSN (online) 1473-5644
    ISSN 0022-2615
    DOI 10.1099/jmm.0.070409-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Equine grass sickness: are we any nearer to answers on cause and prevention after a century of research?

    Newton, J R / Wylie, C E / Proudman, C J / McGorum, B C / Poxton, I R

    Equine veterinary journal

    2010  Volume 42, Issue 6, Page(s) 477–481

    MeSH term(s) Animals ; Autonomic Nervous System Diseases/complications ; Autonomic Nervous System Diseases/prevention & control ; Autonomic Nervous System Diseases/veterinary ; Bacterial Vaccines/immunology ; Botulism/complications ; Botulism/prevention & control ; Horse Diseases/etiology ; Horses ; Myenteric Plexus/pathology ; Research ; Time Factors ; United Kingdom/epidemiology
    Chemical Substances Bacterial Vaccines
    Language English
    Publishing date 2010-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 41606-x
    ISSN 0425-1644
    ISSN 0425-1644
    DOI 10.1111/j.2042-3306.2010.00155.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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