치면세균막내의 Fusobacterium nucleatum과 Actinobacillus actinomycetemcomitans의 동정을 위한 세균배양법 및 Multiplex PCR법의 비교
Comparison between Bacterial Culture Method and Multiplex PCR for Identification of Fusobacterium nucleatum and Actinobacillus actinomycetemcomitans from the Dental Plaques
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본 연구는 성인성 치주염 환자의 치은연하 치면세균막 을 총 60개 치아에서 채취하여 F. nucleatum과 A. actinomycetemcomitans의 동정을 위해 세균배양법, single PCR법 및 multiplex PCR법을 실시하였고, 세균 동정법간 의 비교를 통해 다음과 같은 결과를 얻었다. 1. F. nucleatum과 A. actinomycetemcomitans의 동정을 위해 세균배양법, single PCR 및 multiplex PCR을 실시한 결과 F. nucleatum은 각각 12개(20.0%), 45 개(75.0%), 43개(71.7%) 치아에서 양성반응을 보였 지만, A. actinomycetemcomitans는 각각 0개(0.0%), 4개(6.7%), 1개(1.7%) 치아에서 양성반응이 나타났 다. 2. F. nucleatum은 세균배양법에 비해 single PCR법 및 multiplex PCR법에서 높은 검출 빈도를 보여 좀 더 효율적인 세균 동정법으로 생각되었지만, 통계적으 로는 유의한 차이가 없었다. 3. A. actinomycetemcomitans는 세균배양법에서 전혀 검출되지 않아 통계적으로 검정할 수 없었고, 세균 동정법간의 비교도 어려웠다. 4. F. nucleatum과 A. actinomycetemcomitans의 동정을 위한 single PCR법과 multiplex PCR법 간의 비교에 서 두 세균 모두 검출 빈도에 있어서는 큰 차이를 보 이지 않았지만, 통계적으로는 유의한 차이를 보였다.
Abstract
This study was carried out for the purpose of comparing bacterial culture method, single PCR, and multiplex PCR for identification of F. nucleatum and A. actinomycetemcomitans in subgingival plaque of adult periodontitis. Targeting 20 patients with adult periodontitis, the subgingival plaque was collected in teeth, respectively, for #16, #36, #44. A bacillus was cultivated by painting it over the solid selective media of F. nucleatum and A. actinomycetemcomitans. Bacterial species were detected in 0 tooth with 12 pieces, respectively. Through single PCR and multiplex PCR, the positive reaction was indicated in 43 teeth with 45 pieces, respectively, as for F. nucleatum, and in 1 tooth with 4 pieces, respectively, as for A. actinomycetemcomitans. In the comparative analysis between bacterial identification methods, F. nucleatum showed the more statistically significant difference(p=0.000) in comparison between single PCR and multiplex PCR. Even A. actinomycetemcomitans was indicated significantly(p=0.067) in a case that is based on 0.1 in significant level in the comparison between single PCR and multiplex PCR. In conclusion, as a result of comparing the bacterial identification methods, the detection frequency was indicated to be higher in PCR than in bacterial culture method. Single PCR and multiplex PCR showed the mutually similar detection frequency. Accordingly, given thinking of economic efficiency, quickness, and reduction in labor force, it is thought to be more efficient method to use single PCR as the bacterial identification method.
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