Detection of Transient Bacteraemia following Dental Extractions by 16S rDNA Pyrosequencing: A Pilot Study

被引:47
作者
Benitez-Paez, Alfonso [2 ]
Alvarez, Maximiliano [3 ]
Belda-Ferre, Pedro [2 ]
Rubido, Susana [1 ]
Mira, Alex [2 ]
Tomas, Inmaculada [1 ]
机构
[1] Univ Santiago de Compostela, Sch Med & Dent, Santiago De Compostela, Spain
[2] Ctr Adv Res Publ Hlth CSISP, Genom & Hlth Dept, Valencia, Spain
[3] Univ Hosp Complex, Inst Biomed Res, Dept Microbiol, Vigo, Spain
来源
PLOS ONE | 2013年 / 8卷 / 03期
关键词
PERIODONTAL-DISEASE; PCR; ENDOCARDITIS; CHILDREN; PREVALENCE; DNA; MICROORGANISMS; IDENTIFICATION; ALIGNMENTS; INTENSITY;
D O I
10.1371/journal.pone.0057782
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Objective: The current manuscript aims to determine the prevalence, duration and bacterial diversity of bacteraemia following dental extractions using conventional culture-dependent methods and 16S rDNA pyrosequencing. Methods: The study group included 8 patients undergoing dental extractions under general anaesthesia. Peripheral venous blood samples were collected at baseline, 30 seconds and 15 minutes after the dental extractions. Blood samples were analysed for bacteraemia applying conventional microbiological cultures under aerobic and anaerobic conditions as well as pyrosequencing using universal bacterial primers that target the 16S ribosomal DNA gene. Results: Transient bacteremia was detected by culture-based methods in one sample at baseline time, in eight samples at 30 seconds, and in six samples at 15 minutes after surgical procedure; whereas bacteraemia was detected only in five blood samples at 30 seconds after dental extraction by using pyrosequencing. By applying conventional microbiological methods, a single microbial species was detected in six patients, and Streptococcus viridans was the most frequently cultured identified bacterium. By using pyrosequencing approaches however, the estimated blood microbial diversity after dental extractions was 13.4 +/- 1.7 bacterial families and 22.8 +/- 1.1 genera per sample. Conclusion: The application of 16S rDNA pyrosequencing underestimated the prevalence and duration of bacteraemia following dental extractions, presumably due to not reaching the minimum DNA required for PCR amplification. However, this molecular technique, unlike conventional culture-dependent methods, revealed an extraordinarily high bacterial diversity of post-extraction bacteraemia. We propose that microorganisms recovered by culture may be only the tip of an iceberg of a really diverse microbiota whose viability and potential pathogenicity should be further studied.
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页数:8
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