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Updated: Aug 15, 2026

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In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA
Published on: May 21, 2015
Observation of an unusually large spirochete in endodontic infection
U R Dahle1, L Tronstad, I Olsen
1Division of Endodontics and Department of Microbiology, Dental Faculty, University of Oslo, Norway.
Oral Microbiology and Immunology
|August 1, 1993
Abstract:
Spirochetes in the root canal have been investigated only to a minor extent. Oral spirochetes have been detected particularly in the periodontal pocket, where small, medium-sized and large morphotypes have been reported. In the present darkfield and scanning electron microscopic study we describe a spirochete isolated from the root canal that is 7 times longer (140 microns long) and 5 times thicker (2 microns thick) than usual for treponemes.

