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Journal of Clinical Microbiology, January 2003, p. 192-196, Vol. 41, No. 1
0095-1137/03/$08.00+0 DOI: 10.1128/JCM.41.1.192-196.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
Characteristics of Massilia timonae and Massilia timonae-Like Isolates from Human Patients, with an Emended Description of the Species
David Lindquist,1* Donna Murrill,2 W. Patrick Burran,3 Gloria Winans,4 J. Michael Janda,1 and Will Probert1
Microbial Diseases Laboratory, Division of Communicable Disease Control, California Department of Health Services, Berkeley, California 94704,1
Butte County Health Department Laboratory,2
Enloe Hospital, Chico, California 95926,3
San Joaquin County Public Health Laboratory, Stockton, California 952014
Received 16 July 2002/
Returned for modification 21 August 2002/
Accepted 15 October 2002
The description of Massilia timonae, a nonfermentative aerobic gram-negative rod, was based on a single strain. A subsequent report of a second isolate has been recently published. Phenotypic descriptions of these two strains were based primarily on commercial test kit results. We have identified three additional strains as M. timonae by 16S rRNA sequence analysis and have characterized them phenotypically in parallel with the type strain of M. timonae, CIP 105350, by conventional test methods. A fourth strain, designated M. timonae-like, was also characterized. All four strains were isolated from human patients: two were blood isolates, one was isolated from cerebrospinal fluid, and one was isolated from bone. The four strains and the type strain were quite similar phenotypically. However, in contrast to the original description, the strains were found to be oxidase positive and arginine dihydrolase negative and to have lateral flagella as well as a single polar flagellum. Additionally the strains produced acid oxidatively from some carbohydrates. Other phenotypic characteristics, including cellular fatty acids, agreed with the original description. Based on our emended description, M. timonae and M. timonae-like strains can be differentiated from other aerobic nonfermentative gram-negative rods by conventional biochemical tests combined with cellular fatty acid analysis.
* Corresponding author. Mailing address: Microbial Diseases Laboratory, California Department of Health Services, 2151 Berkeley Way, Berkeley, CA 94704. Phone: (510) 540-2254. Fax: (510) 540-2374. E-mail:
dlindqui{at}dhs.ca.gov.
Journal of Clinical Microbiology, January 2003, p. 192-196, Vol. 41, No. 1
0095-1137/03/$08.00+0 DOI: 10.1128/JCM.41.1.192-196.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
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