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Journal of Clinical Microbiology, Feb 1995, 445-454, Vol 33, No. 2
JG Fox, LL Yan, FE Dewhirst, BJ Paster, B Shames, JC Murphy, A Hayward, JC Belcher and EN Mendes
A fusiform bacterium with 3 to 14 multiple bipolar sheathed flagella and
periplasmic fibers wrapped around the cell was isolated from the liver,
bile, and lower intestine of aged, inbred mice. The bacteria grew at 37 and
42 degrees C under microaerophilic conditions, rapidly hydrolyzed urea,
were catalase and oxidase positive, reduced nitrate to nitrite, did not
hydrolyze indoxyl acetate or hippurate, and were resistant to both
cephalothin and nalidixic acid but sensitive to metronidazole. On the basis
of 16S rRNA gene sequence analysis, the organism was classified as a novel
helicobacter, Helicobacter bilis. This new helicobacter, like Helicobacter
hepaticus, colonizes the bile, liver, and intestine of mice. Although the
organism is associated with multifocal chronic hepatitis, further studies
are required to ascertain whether H. bilis is responsible for causing
chronic hepatitis and/or hepatocellular tumors in mice.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Helicobacter bilis sp. nov., a novel Helicobacter species isolated from bile, livers, and intestines of aged, inbred mice
Division of Comparative Medicine, Massachusetts Institute of Technology Cambridge 02139.
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