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Journal of Clinical Microbiology, July 2002, p. 2681-2685, Vol. 40, No. 7
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.7.2681-2685.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Catheter-Related Microbacterium Bacteremia Identified by 16S rRNA Gene Sequencing

Susanna K. P. Lau,1 Patrick C. Y. Woo,1 Gibson K. S. Woo,1 and Kwok-Yung Yuen1,2*

Department of Microbiology, The University of Hong Kong,1 HKU-Pasteur Research Centre, Hong Kong2

Received 26 December 2001/ Returned for modification 1 March 2002/ Accepted 22 March 2002

We describe the application of 16S rRNA gene sequencing in defining two cases of catheter-related Microbacterium bacteremia. In the first case, a gram-positive bacillus was isolated from both the blood culture and central catheter tip of a 39-year-old woman with chronic myeloid leukemia. The API Coryne system identified the isolate as 98.9% Aureobacterium or Corynebacterium aquaticum. In the second case, a gram-positive bacillus was recovered from five sets of blood cultures from both central catheter and percutaneous venipuncture of a 5-year-old girl with acute myeloid leukemia. The isolate was identified by the API Coryne system as 99.7% Cellulomonas or Microbacterium species. Further phenotypic tests failed to identify the two isolates. 16S rRNA gene sequencing showed 99.4% similarity between the first isolate and Microbacterium oxydans and 98.7% similarity between the second isolate and Microbacterium trichotecenolyticum, indicating that both isolates were Microbacterium species. Microbacterium infections are rarely reported in the literature. Although the central venous catheter was previously proposed to be a source of bacteremia, the first case in this report represents the first culture-documented case of catheter-related Microbacterium bacteremia.

* Corresponding author. Mailing address: Department of Microbiology, The University of Hong Kong, University Pathology Building, Queen Mary Hospital, Hong Kong. Phone: (852) 28554892. Fax: (852) 28551241. E-mail: hkumicro{at}hkucc.hku.hk.

Journal of Clinical Microbiology, July 2002, p. 2681-2685, Vol. 40, No. 7
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.7.2681-2685.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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