PMID- 18028053 OWN - NLM STAT- MEDLINE DCOM- 20080219 LR - 20191210 IS - 0909-8836 (Print) IS - 0909-8836 (Linking) VI - 115 IP - 6 DP - 2007 Dec TI - In situ identification of streptococci and other bacteria in initial dental biofilm by confocal laser scanning microscopy and fluorescence in situ hybridization. PG - 459-67 AB - Confocal laser scanning microscopy (CLSM) has been employed as a method for studying intact natural biofilm. When combined with fluorescence in situ hybridization (FISH) it is possible to analyze spatial relationships and changes of specific members of microbial populations over time. The aim of this study was to perform a systematic description of the pattern of initial dental biofilm formation by applying 16S rRNA-targeted oligonucleotide probes to the identification of streptococci and other bacteria, and to evaluate the usefulness of the combination of CLSM and FISH for structural studies of bacterial populations in dental biofilm. Biofilms were collected on standardized glass slabs mounted in intra-oral appliances and worn by 10 individuals for 6, 12, 24 or 48 h. After intra-oral exposure the biofilms were labelled with probes against either streptococci (STR405) or all bacteria (EUB338) and analysed by CLSM. The current approach of using FISH techniques enabled differentiation of streptococci from other bacteria and determination of their spatio-temporal organization. The presence of chimney-like multilayered microcolonies with different microbial compositions demonstrated by this methodology provided information supplementary to our previous knowledge obtained by classical electron microscopic methods and increased our understanding of the structure of developing biofilms. FAU - Dige, Irene AU - Dige I AD - Department of Dental Pathology, Operative Dentistry and Endodontics, School of Dentistry, University of Aarhus, Arhus, Denmark. idige@odont.au.dk FAU - Nilsson, Holger AU - Nilsson H FAU - Kilian, Mogens AU - Kilian M FAU - Nyvad, Bente AU - Nyvad B LA - eng PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Eur J Oral Sci JT - European journal of oral sciences JID - 9504563 RN - 0 (DNA Probes) RN - 0 (Oligonucleotide Probes) RN - 0 (RNA, Ribosomal, 16S) SB - IM MH - Adult MH - *Biofilms MH - DNA Probes/genetics MH - Dental Plaque/*microbiology MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence/methods MH - Male MH - Microscopy, Confocal/methods MH - Oligonucleotide Probes MH - RNA, Ribosomal, 16S/*analysis MH - Streptococcus/genetics/*isolation & purification MH - Time Factors EDAT- 2007/11/22 09:00 MHDA- 2008/02/20 09:00 CRDT- 2007/11/22 09:00 PHST- 2007/11/22 09:00 [pubmed] PHST- 2008/02/20 09:00 [medline] PHST- 2007/11/22 09:00 [entrez] AID - EOS494 [pii] AID - 10.1111/j.1600-0722.2007.00494.x [doi] PST - ppublish SO - Eur J Oral Sci. 2007 Dec;115(6):459-67. doi: 10.1111/j.1600-0722.2007.00494.x.