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- CCoD-A: Life Sciences 1200 Issue 28 (12 Jul 93) Mon Jul 19 13:38:51 1993
-
-
- Author NP Mapstone, DAF Lynch, FA Lewis, ATR Axon,
- DS Tompkins, MF Dixon, P Quirke
- Title Identification of Helicobacter-pylori DNA in the
- Mouths and Stomachs of Patients with Gastritis Using
- PCR
- Source Journal of Clinical Pathology 46: 6 (JUN 1993)
- Page(s) 540-543
- KeyWords+ POLYMERASE CHAIN-REACTION; CAMPYLOBACTER-PYLORI;
- DENTAL PLAQUE; INFECTION; BIOPSIES
- TGA No. LG288
- Discipl. Clinical Medicine
- Document Article
- Language English
- Address NP Mapstone, Gen Infirm Leeds,
- Acad Unit Pathol Chem Pathol & Immunol,
- Great George St, Leeds LS19 6BT, England
- Abstract Aims-To determine the prevalence of Helicobacter
- pylori colonisation in the mouths of patients with
- H pylori gastritis.
-
- Methods-A nested polymerase chain reaction test for
- the 16S ribosomal RNA gene of H pylori was used on
- saliva, dental plaque, gastric juice and gastric
- biopsy specimens from patients attending a
- dyspepsia clinic.
-
- Results-Thirteen patients had histologically
- confirmed Helicobacter associated gastritis. Twelve
- of these had positive gastric aspirates by PCR.
- Five had at least one positive oral specimen. Eight
- patients with normal gastric biopsy specimens had
- no PCR positive oral specimens or gastric
- aspirates. All, however, had PCR positive gastric
- biopsy specimens. In an attempt to determine the
- origin of these positive results in normal patients,
- it was shown that biopsy forceps could contaminate
- specimens with DNA from previous patients.
-
- Conclusion-The demonstration of the organism in the
- mouths of a substantial proportion of dyspeptic
- patients has major implications for the spread of H
- pylori and identifies a potential source for
- reinfection following eradication of the organism
- from the stomach.
- ISBN/ISSN 0021-9746
- Publisher British Medical Assn, British Med Assn House,
- Tavistock Square, London WC1H 9JR, United Kingdom
-
- Author JD Rudney, MA Krig, EK Neuvar
- Title Longitudinal Study of Relations Between Human
- Salivary Antimicrobial Proteins and Measures of
- Dental Plaque Accumulation and Composition
- Source Archives of Oral Biology 38: 5 (MAY 1993)
- Page(s) 377-386
- Keywords Saliva; Lysozyme; Lactoferrin; Peroxidase; SIgA;
- Plaque; Streptococcus-Sanguis
- KeyWords+ SECRETORY IMMUNOGLOBULIN-A; HUMAN-PAROTID SALIVA;
- STREPTOCOCCUS-SANGUIS; VIRIDANS STREPTOCOCCI; SP-NOV;
- BACTERICIDAL ACTIVITY; PHYSIOLOGICAL FACTORS;
- HYPOTHIOCYANITE ION; ORAL STREPTOCOCCI; WHOLE SALIVA
- TGA No. LG414
- Discipl. Experimental Biology & Medicine
- Document Article
- Language English
- Address JD Rudney, Univ Minnesota, Sch Dent, Dept Oral Sci,
- Minneapolis, MN 55455
- Abstract Many studies have attempted to relate levels of
- antimicrobial proteins in saliva to oral health;
- results have been inconsistent, and one reason
- might be inconsistency of measures of plaque and
- saliva within subjects. This study investigated
- associations between plaque and salivary variables
- in longitudinal data. Whole saliva, and 8-h plaque
- pooled from buccal first permanent molars, was
- obtained from 32 dental students on Tuesdays from 3:
- 00-6:00 p.m. over 4 weeks. Salivary flow rate was
- determined, and samples were assayed for lysozyme,
- lactoferrin, total peroxidase, myeloperoxidase,
- OSCN-, sIgA and total protein. Colonies on mitis-
- salivarius agar were assigned to Streptococcus
- sanguis, Strep. mutans or Strep. salivarius on the
- basis of morphology, supplemented by the API Rapid
- Strep identification system. Consistency of values
- within subjects across weeks was evaluated by
- repeat-measures analysis of variance and intraclass
- correlation; data were transformed to reduce
- skewness. Pearson's r was used to determine
- associations between plaque and salivary variables.
- Significant intraclass correlations (alpha = 0.05)
- were found for all salivary variables except
- myeloperoxidase, and for total flora, total
- streptococci, Strep. sanguis and Strep. sanguis as
- a proportion of total streptococci. Significant
- Pearson correlations with Strep. sanguis as a
- proportion of total streptocci were found for total
- protein (r = -0.24), sIgA (r = -0.22), lactoferrin
- (r = 0.19) and OSCN- (r = 0.20) when data from all
- weeks were pooled (n = 128). Strep. sanguis
- proportions tended to bc low in subjects with high
- values for salivary proteins; the range of
- proportions was wider in subjects with low salivary
- values. These findings suggest some consistency of
- weekly values for many plaque and salivary
- variables. They also support previous cross-
- sectional data which suggested that salivary
- antimicrobial proteins may have some effect on
- plaque composition. This study was made before
- recent revisions in streptococcal taxonomy, and
- further research is needed to clarify interactions
- of salivary proteins with currently defined species.
- ISBN/ISSN 0003-9969
- Publisher Pergamon Press Ltd, Headington Hill Hall,
- Oxford OX3 0BW, United Kingdom
-
- Author H Tanaka, M Tamura, K Kikuchi, F Kuwata, Y Hirano,
- K Hayashi
- Title An Enzymological Profile of the Production of Lactic
- Acid in Caries-Associated Plaque and in Plaque Formed
- on Sound Surfaces of Deciduous Teeth
- Source Caries Research 27: 2 (MAR-APR 1993)
- Page(s) 130-134
- Keywords Cariogenicity; Dental Plaque; Fructose 1,6-
- Bisphosphate Dependency; Lactate Dehydrogenase
- KeyWords+ PYRUVATE FORMATE-LYASE; STREPTOCOCCUS-MUTANS; SUGAR
- METABOLISM; DENTAL PLAQUE; SUCROSE METABOLISM;
- FLUOROMETRIC ASSAY; FERMENTATION; OXYGEN; CHILDREN;
- LESIONS
- TGA No. LG602
- Discipl. Experimental Biology & Medicine
- Document Article
- Language English
- Address H Tanaka, Nihon Univ, Sch Dent, Dept Bacteriol,
- 1-8-13 Kanda Surugadai, Chiyoda Ku, Tokyo 101, Japan
- Abstract Specific activities of lactate dehydrogenase (LDH)
- and its fructose, 1,6-bisphosphate (FBP) dependency
- in the small amount of plaque formed on deciduous
- teeth were determined and compared between those
- from carious lesions and from sound surfaces.
- Although the caries-associated plaque showed a
- higher production of lactic acid than the plaque
- formed on sound surfaces, it occurred only when
- sufficient FBP was present. The proportion of
- activity of FBP-dependent LDH relative to that of
- total LDH varied much more in the caries-associated
- plaque than in the plaque formed on sound surfaces.
- Hence, the varying activity of FBP-dependent LDH
- might be a distinguishing feature of caries-
- associated plaque compared with plaque formed on
- sound surfaces.
- ISBN/ISSN 0008-6568
- Publisher Karger, Allschwilerstrasse 10, CH-4009 Basel,
- Switzerland
-
- Author K Ahmady, PD Marsh, HN Newman, JS Bulman
- Title Distribution of Streptococcus-Mutans and
- Streptococcus-Sobrinus at Sub-Sites in Human
- Approximal Dental Plaque
- Source Caries Research 27: 2 (MAR-APR 1993)
- Page(s) 135-139
- Keywords Approximal Plaque; Bacterial Distribution;
- Streptococcus-Mutans; Streptococcus-Sobrinus
- KeyWords+ SELECTIVE MEDIUM; PREVALENCE; SALIVA; CARIES
- TGA No. LG602
- Discipl. Experimental Biology & Medicine
- Document Article
- Language English
- Address HN Newman, Univ London, British Postgrad Med Federat,
- Inst Dent Surg, Dept Periodontol, 256 Grays Inn Rd,
- London WC1X 8LD, England
- Abstract The distribution and prevalence of Streptococcus
- mutans and Streptococcus sobrinus were determined
- at three sub-sites in human approximal plaque: away
- from (A), to the side of (S) and below (B) the
- contact area. Small plaque samples were taken from
- all three sub-sites on clinically sound approximal
- surfaces of a single premolar from each of 21
- schoolchildren. S. mutans was detected
- significantly more often and in higher proportions
- than S. sobrinus from sub-sites A (p = 0.019), S (p
- = 0.034) and B (p = 0.004). S. mutans was detected
- in highest proportions from the B site compared to
- the A site (p = 0.025); there were no significant
- differences in the isolation frequency or
- prevalence of S. sobrinus from any of the sub-
- sites. S. mutans and S. sobrinus were never
- isolated together from the A sub-sites and were
- recovered together most commonly from the B sub-
- sites (p<0.01). It is concluded that S. mutans and
- S. sobrinus preferentially colonise the most caries-
- prone site apical to the contact area.
- ISBN/ISSN 0008-6568
- Publisher Karger, Allschwilerstrasse 10, CH-4009 Basel,
- Switzerland
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-