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Abstract : Real-time PCR analysis of fungal organisms and bacterial species at peri-implantitis sites

Abstract : Real-time PCR analysis of fungal organisms and bacterial species at peri-implantitis sites

author: Frank Schwarz, Kathrin Becker, Sebastian Rahn, Andrea Hegewald, Klaus Pfeffer, Birgit Henrich | publisher: drg. Andreas Tjandra, Sp. Perio, FISID

The potential role of fungal organisms and their co-aggregation with either periodontopathogens or opportunistic pathogens at peri-implantitis sites is unknown. The aim of the present study was to qualitatively/quantitatively analyze and correlate fungal organisms and bacterial species at peri-implantitis sites.

In a total of 29 patients, submucosal/subgingival plaque samples were collected at peri-implantitis and healthy implant sites as well as teeth with a history of periodontitis (controls). A real-time PCR assay was established for the qualification of fungal organisms and a TaqMan assay for the quantification of Porphyromonas gingivalis, Parvimonas micra, Tannerella forsythia, Mycoplasma salivarium, Veillonella parvula, and Staphylococcus aureus.

Fungal organisms were more frequently identified at peri-implantitis (31.6%) (i.e., Candida albicans, Candida boidinii, Penicillium spp., Rhodotorula laryngis, Paelicomyces spp., Saccharomycetes, Cladosporium cladosporioides) and healthy implant sites (40% - Candida dubliniensis, C. cladosporioides) than at selected teeth (20% - C. albicans, Fusarium solani). At implant sites, fungal organisms were significantly correlated with P. micra and T. forsythia.

Candida spp. and other fungal organisms were frequently identified at peri-implantitis as well as healthy implant sites and co-colonized with P. micra and T. forsythia.

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