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Journal of Clinical Microbiology, December 2003, p. 5650-5653, Vol. 41, No. 12
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.12.5650-5653.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Characterization of a Novel Rapidly Growing Mycobacterium Species Associated with Sepsis

Tao Hong,1* W. Ray Butler,2 Frank Hollis,1 Margaret M. Floyd,2 Sean R. Toney,2 Yi-Wei Tang,3 Cindy Steele,4,,5 and Robert J. Leggiadro4,5

Microbiology Laboratory, Department of Pathology,1 Department of Pediatrics, Hackensack University Medical Center, Hackensack,4 University of Medicine and Dentistry of New Jersey, Newark, New Jersey,5 Division of AIDS, STD, and TB Laboratory Research, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia,2 Departments of Medicine and Pathology, Vanderbilt University School of Medicine, Nashville, Tennessee3

Received 12 May 2003/ Returned for modification 14 July 2003/ Accepted 19 September 2003

A rapidly growing mycobacterium was isolated five times from blood cultures from a 6-year-old female patient with relapsed pre-B-cell acute lymphocytic leukemia. All five isolates had identical nucleotide sequences for the first 500 bp of the 16S rRNA gene, indicative of a single species. High-performance liquid chromatography analysis of mycolic acids indicated that the species was similar to Mycobacterium smegmatis. Sequence analysis of the 16S rRNA gene (1,455 bp) for one isolate demonstrated that the species was closely related to Mycobacterium diernhoferi. Based on the phenotypic features and phylogenetic analysis, it was concluded that the isolates represented a novel rapidly growing Mycobacterium species. The name "Mycobacterium hackensackense" is proposed for this unique strain, 147-0552T, which was deposited in the American Type Culture Collection as ATCC BAA-823T.

* Corresponding author. Mailing address: Department of Pathology, Clinical Microbiology Laboratory, Hackensack University Medical Center, 30 Prospect Ave., Hackensack, NJ 07601. Phone: (201) 996-4854. Fax: (201) 996-2156. E-mail: thong{at}humed.com.

Journal of Clinical Microbiology, December 2003, p. 5650-5653, Vol. 41, No. 12
0095-1137/03/$08.00+0     DOI: 10.1128/JCM.41.12.5650-5653.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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