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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 18 (2003), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background : Bacteria have been implicated in the pathogenesis of inflammatory bowel disease. Helicobacter species have been shown to cause colitis in animal models and have been identified in human diarrhoeal illness and Crohn's disease.Aim: : To determine whether Helicobacter species are present in human inflammatory bowel disease tissue.Methods: : Thirty patients undergoing colonoscopy for clinical reasons were studied. Nine had Crohn's disease, 11 had ulcerative colitis and 10 had histologically normal colons. Tissue was snap-frozen at −70 °C. DNA was extracted and examined by five different polymerase chain reaction (PCR) assays that were either genus or species specific for Helicobacter.Results : Analyses of colonic biopsies by two Helicobacter genus-specific PCR assays, two H. pylori-specific assays and a PCR assay designed to amplify fragments of ‘H. heilmannii’-like organisms demonstrated that product was not generated by any test. Internal control PCR demonstrated that PCR results for the five assays were not negative due to the presence of residual substances inhibitory to PCR.Conclusions : Helicobacter species were not identified in this study, using multiple PCRs to eliminate the problems of non-specific cross-reaction. This suggests that Helicobacter species do not play a role in the pathogenesis of inflammatory bowel disease.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 14 (1995), S. 223-226 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Between January and April 1993, culture forClostridium difficile and a faecal cytotoxin assay were performed on 500 selected specimens. Isolates from culture-positive patients from whom faecal samples were cytotoxin negative were also examined in vitro for cytotoxin production. The significance of a positive culture result in the absence of faecal cytotoxin was assessed. Forty-one of the 500 specimens were toxin positive. In only 25 of these wasClostridium difficile examination specifically requested. Six of nine culture-positive cytotoxin-negative patients (11 specimens) had recently received antibiotics. In four of these,Clostridium difficile was considered to be of possible clinical significance. Culture and in vitro determination of toxin production of isolates may aid in the diagnosis of some additional cases, but cytotoxin detection remains the single optimal routine laboratory method for diagnosis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 6 (1987), S. 51-53 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two patients with relapsing Clostridium difficile diarrhoea following metronidazole and vancomycin therapy were colonised with a non-toxigenic avirulent Clostridium difficile strain given orally in three doses. Both patients appeared to respond without sideeffects. Oral bacteriotherapy with a defined nontoxigenic strain of Clostridium difficile would appear to represent an acceptable, alternative and novel way to treat hospitalised patients who relapse with Clostridium difficile diarrhoea after specific antibiotic therapy.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 11 (1992), S. 360-363 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A new enzyme immunoassay (EIA) kit developed for the rapid detection ofClostridium difficile toxin A in faecal specimens, Premier (Meridian Diagnostics), was evaluated using 101 faecal specimens. Sixty-nine specimens were positive forClostridium difficile by isolation of the organism and by cytotoxicity in tissue culture. The EIA for toxin A was positive in 49 of these 69 cases. No specimen that was negative for cytotoxicity was positive by EIA. Eight of the 32 specimens negative by both EIA and cytotoxicity assay yieldedClostridium difficile by culture. In five of these cases the cytotoxigenic status of the isolate was determined, and four were positive. There was no direct relationship between cytotoxin titre and EIA reading.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  An immunoassay for the detection of Clostridium difficile toxin A in stool samples (Clearview C. DIFF A; Unipath, UK) was evaluated against the cell cytotoxicity assay using 407 stool samples from patients suspected to have, or considered at risk of, antibiotic-associated diarrhoea. Of the samples tested, 98 were positive and 280 were negative by both tests (sensitivity 83.1%, specificity 96.9%). Following resolution of the 29 discrepant results, the sensitivity and specificity of the immunoassay were 91% and 98%, respectively, and the sensitivity for the cell cytotoxicity assay was calculated as 91.5%, with a specificity of 99%. The Clearview C. DIFF A test proved to be a rapid simple assay for the detection of Clostridium difficile toxin A in stool samples. The test was equally suited to single or batch testing, required minimal sample handling, and provided results within 30 min of applying the sample to the test unit.
    Type of Medium: Electronic Resource
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