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Journal of Clinical Microbiology, August 1998, p. 2264-2270, Vol. 36, No. 8
Department of Veterinary & Biomedical
Sciences, University of Nebraska, Lincoln, Nebraska
68583-09051;
Division of Veterinary
& Biomedical Sciences, Murdoch University, Murdoch, Western Australia
6150, Australia2; and
National
Veterinary Research Institute, Pu
Received 19 February 1998/Returned for modification 17 April
1998/Accepted 12 May 1998
The spirochetes inhabiting the large intestines of humans and
animals consist of a diverse group of related organisms. Intestinal spirochetosis caused by Serpulina pilosicoli is a newly
recognized enteric disease of human beings and animals with potential
public health significance. The purpose of this study was to determine the species identity of canine intestinal spirochetes by comparing 30 isolates obtained from dogs in Australia (n = 25) and
the United States (n = 5) with reference strains
representing Serpulina species and Brachyspira
aalborgi, by phenotypic and genetically based typing methods. All
of the canine isolates were indole negative and produced a weak
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Canine Intestinal Spirochetes Consist of
Serpulina pilosicoli and a Newly Identified Group
Provisionally Designated "Serpulina canis" sp.
nov.


awy, Poland3
-hemolysis when cultured anaerobically on agar medium containing
blood. Four isolates were identified as S. pilosicoli by
16S rRNA-specific PCR assays, rRNA gene restriction fragment length
polymorphism or ribotyping, and multilocus enzyme electrophoresis. The
remaining 26 isolates formed a cluster related to porcine
Serpulina innocens as determined by multilocus enzyme electrophoresis but had a unique ribotype pattern. The data suggested the existence of a novel Serpulina species, provisionally
designated "Serpulina canis," colonizing the intestines
of dogs.
*
Corresponding author. Mailing address: Room 147, Veterinary Basic Science Bldg., Department of Veterinary & Biomedical
Sciences, University of Nebraska
Lincoln, Lincoln, NE 68583-0905. Phone: (402) 472-3862. Fax: (402) 472-9690. E-mail:
Vets041{at}unlvm.unl.edu.
Paper no. 12157 of the Agriculture Research Division, Institute for
Agriculture and Natural Resources, University of Nebraska
Lincoln.
Present address: National Animal Disease Center, Ames, Iowa.
§
Present address: Animal Health Diagnostic Laboratory, Michigan
State University, Lansing.
Present address: Pig Improvement Company, Central Europe,
Pu
awy, Poland.
#
Present address: College of Veterinary Medicine, Chonnam National
University, Kwangju, Republic of Korea.
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