Bacterial diversity in the saliva of patients with different oral hygiene indexes

Brazilian Dental Journal

Juliana Vianna Pereira¹  Luciana Leomil¹  Fabíola Rodrigues-albuquerque¹  José Odair Pereira¹  Spartaco Astolfi-filho¹ 

[1] ,Federal University of Amazonas Multidisciplinary Support Center Manaus AM ,Brazil

关键词: bacterial diversity;    16S rRNA gene;    saliva;    dental biofilm;   

DOI  :  10.1590/S0103-64402012000400017

来源: SciELO

【 摘 要 】

The objective of the present study was to evaluate the bacterial diversity in the saliva of patients with different oral hygiene indexes using of two 16S rRNA gene libraries. Each library was composed of samples from patients with different averages of the differentiated Silness-Löe biofilm index: the first library (A) with an index between 1.0 and 3.0 (considered a high index) and the second library (B) between 0 and 0.5 (considered a low index). Saliva DNA was extracted and the 16S rRNA gene was amplified and cloned. The obtained sequences were compared with those stored at NCBI and RDP GenBank. The saliva of patients with high index presented five known genera - Streptococcus, Granulicatella, Gemella, Veillonella and Peptostreptococcus - and 33.3% of nonculturable bacteria grouped into 23 operational taxonomic units (OTUs). The saliva of patients with low index differed significantly from the first library (p=0.000) and was composed of 42 OTUs distributed into 11 known genera - Streptococcus, Granulicatella, Gemella, Veillonella, Oribacterium, Haemophilus, Escherichia, Neisseria, Prevotella, Capnocytophaga, Actinomyces - including 24.87% of nonculturable bacteria. It was possible to conclude that there is greater bacterial diversity in the saliva of patients with low dental plaque in relation to patients with high dental plaque.

【 授权许可】

CC BY   
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