- International Journal of Systematic and Evolutionary Microbiology
- Volume 42, Issue 1
f Helicobacter muridarum sp. nov., a Microaerophilic Helical Bacterium with a Novel Ultrastructure Isolated from the Intestinal Mucosa of Rodents
- Authors: A. Lee*, M. W. Phillips, J. L. O'rourke, B. J. Paster, F. E. Dewhirst, G. J. Fraser, J. G. Fox, L. I. Sly, P. J. Romaniuk, T. J. Trust, S. Kouprach
- *Corresponding author.
- First Published Online: 01 January 1992, International Journal of Systematic and Evolutionary Microbiology 42: 27-36, doi: 10.1099/00207713-42-1-27
- Subject: Original Papers Relating To Systematic Bacteriology
- Issue Published:
Helical organisms with novel ultrastructural characteristics were isolated from the intestinal mucosa of rats and mice. These bacteria were characterized by the presence of 9 to 11 periplasmic fibers which appeared as concentric helical ridges on the surface of each cell. The cells were motile with a rapid corkscrewlike motion and had bipolar tufts of 10 to 14 sheathed flagella. The bacteria were microaerophilic, nutritionally fastidious, and physiologically similar to Helicobacter species and Wolinella succinogenes but could be differentiated from these organisms by their unique cellular ultrastructure. Using 16S rRNA sequencing, we found that strain ST1T (T = type strain) was related to previously described Helicobacter species, “Flexispira rappini,” and W. succinogenes. The closest relatives of strain ST1T were Helicobacter mustelae and “F. rappini” (average similarity value, 96%). On the basis of phylogenetic data, strain ST1T (= ATCC 49282T) represents a new species of the genus Helicobacter, for which we propose the name Helicobacter muridarum.
Copyright © 1992 International Union of Microbiological Societies | Published by the Microbiology Society
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