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- Title
Source of suspected periodontal pathogens re-emerging after periodontal treatment.
- Authors
von Troil-Lindén, Birgitta; Saarela, Maria; Mättö, Jaana; Alaluusua, Satu; Jousimies-Somer, Hannele; Asikainen, Sirkka
- Abstract
To clarify the source of re-emerging periodontal pathogens after treatment, we compared the ribotypes of <em>Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia/Prevotella nigrescens</em> group and Campylobacter rectus before and after treatment in 7 periodontitis patients and in 6 of the spouses. The patients harbored <em>A. actinomycetemcomitans</em>, <em>P. gingivalis</em>, <em>P. intermedia/P. nigrescens</em> group or C. rectus in their subgingival or salivary samples before treatment. The respective bacterial species were not detected 1 month after treatment, but reappeared by 6 months later. When available, 4 random colonies of each of the 4 species were isolated from both subgingival and salivary samples at each sampling occasion, the isolates were subcultured, identified and typed applying pheno- and genotypic intraspecies characterization methods. Altogether 90 strains of <em>A. actinomycetemcomitans</em>, <em>P. gingivalis</em>, <em>P. intermedia/P. nigrescens</em> group and C. rectus were available from 2, 3, 2 and 4 patients, respectively. The pre- and post-treatment ribotypes of <em>A. actinomycetemcomitans</em>-, <em>P. gingivalis</em>- and <em>P. intermedia/P. nigrescens</em> group-isolates were identical in all respective patients. The pre- and post-treatment ribotypes of <em>C. rectus</em> were identical in 1 of 4 patients, whereas 2 patients harbored a previously not detected post-treatment ribotype and 1 patient harbored the initial and a previously not detected post-treatment ribotype. To study the possibility that periodontitis patients may acquire strains from the spouse after treatment, isolates of <em>A. actinomycetemcomitans</em>, <em>P. gingivalis</em>, <em>P. intermedia/P. nigrescens</em> group and C. rectus (n = 95) from the patients' spouses were ribotyped and compared with those of the patients. The patient exhibited his own post-treatment ribotypes, different from those of the spouse, of <em>A. actinomycetemcomitans</em> and <em>P. gingivalis</em> in 1 couple and of <em>P. intermedia/P. nigrescens</em> group and <em>C. rectus</em> in 1 couple. In the 2 patients who harbored a previously not detected post-treatment ribotype of <em>C. rectus</em>, one patient shared the new ribotype with the spouse, whereas the other one did not. Although an exogenous source cannot be fully ruled out, the patient's own oral flora seems to be the main source of re-emerging periodontal pathogens after treatment.
- Subjects
PERIODONTICS; DENTAL hygiene; GINGIVAL diseases; GINGIVITIS; DENTAL plaque; ORAL hygiene; PATHOGENIC microorganisms
- Publication
Journal of Clinical Periodontology, 1996, Vol 23, Issue 6, p601
- ISSN
0303-6979
- Publication type
Article
- DOI
10.1111/j.1600-051X.1996.tb01831.x