Primary Shewanella alga Septicemia in a Patient on Hemodialysis

Author:

Iwata Morihiro1,Tateda Kazuhiro12,Matsumoto Tetsuya12,Furuya Nobuhiko12,Mizuiri Sonoo3,Yamaguchi Keizo12

Affiliation:

1. Clinical Laboratory Department,1

2. Department of Microbiology,2 and

3. Department of Nephrology,3 Toho University School of Medicine, Tokyo 143, Japan

Abstract

ABSTRACT We report the first Japanese case of primary septicemia with Shewanella alga and also describe the bacteriological characteristics of and results of antibiotic susceptibility tests of the isolate. S. alga was repeatedly isolated, at times simultaneously with Escherichia coli , from the blood of a 64-year-old female undergoing hemodialysis. The isolated organism was determined to be S. alga based on recently published identification criteria, such as hemolysis on sheep blood agar, no acid production from carbohydrates, and growth on agar containing 6.5% NaCl. Results of antibiotic susceptibility tests demonstrated that the isolate was sensitive to levofloxacin and cefpirome (MICs, ≤0.063) but resistant to cefazolin, ceftizoxime, and imipenem (MICs, >128, 64, and 8 μg/ml, respectively). Although the role of S. alga as a human pathogen has not been fully determined, accumulating data suggest that this organism may be a potential pathogen, especially in compromised hosts.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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