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  • Title: Colonization by Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia in adult periodontitis patients as detected by the antibody-based Evalusite Test.
    Author: Boyer BP, Ryerson CC, Reynolds HS, Zambon JJ, Genco RJ, Snyder B.
    Journal: J Clin Periodontol; 1996 May; 23(5):477-84. PubMed ID: 8783055.
    Abstract:
    Studies were performed to evaluate the detection of disease-associated bacterial colonization in adult periodontitis patients by the antibody-based Evalusite TestTM (Eastman Kodak Company). The association of test results with disease was assessed by collecting 104 duplicate subgingival plaque samples from 26 patients. Samples were tested for Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia using both microbiological culture and the immunoassay test. The sensitivity and specificity of the 2 methods was calculated using %s of positive results in deep periodontal pockets and negative results in shallow subgingival sites. A cutoff >10(4) cultivable counts yielded the greatest discrimination between health and disease on a cross-sectional basis and established this threshold as clinically relevant for the detection of disease-associated levels of bacterial colonization by these three microorganisms. The clinical detection limit of the immunoassay test was observed to coincide with this threshold of >10(4) cultivable counts. Microbiological testing of the 4 deepest pockets using the immunoassay test was determined to be sufficient to yield a 90% confidence of detecting positive patients in a study with 59 adult subjects. The immunoassay test method was also demonstrated to be effective at detecting bacterial colonization in sets of paper point samples that were pooled for analysis. An overall agreement of 94% (288 of 306) was observed when comparing test results for duplicate sets of pooled and individual samples collected from 51 patients. These studies demonstrate that the Evalusite Test is an effective method for detecting clinically relevant colonization by the test bacteria in patients at risk for periodontal disease.
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