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Appl Environ Microbiol. 1970 February; 19(2): 345-352
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Serratia marcescens: Biochemical, Serological, and Epidemiological Characteristics and Antibiotic Susceptibility of Strains Isolated at Boston City Hospital

James N. Wilfert1, Fred F. Barrett2, W. H. Ewing, Maxwell Finland and Edward H. Kass

Channing Laboratory, Thorndike Memorial Laboratory, Harvard Medical Unit, and Department of Medical Microbiology, Boston City Hospital, the Department of Medicine, Harvard Medical School, Boston, Massachusetts 02118
Enteric Bacteriology Laboratory, National Communicable Disease Center, Atlanta, Georgia 30333

ABSTRACT

The biochemical, serological, and epidemiological characteristics of 95 strains of Serratia marcescens isolated at the Boston City Hospital were examined. Several strains were shown to be endemic, and the majority of isolates were cultured from urine or respiratory secretions. Serratia species were highly resistant to polymyxin B and the cephalosporins, and various proportions were also resistant to other antibiotics including kanamycin, but all of the isolates were sensitive to gentamicin. The appearance of resistance to kanamycin and nalidixic acid among endemic strains was demonstrated. The nosocomial nature of Serratia infections, particularly those involving the urinary tract, was confirmed. Many clinical bacteriology laboratories currently fail to identify the nonpigmented strains.

FOOTNOTES

1 Present address: Division of Infectious Diseases, Department of Medicine, University of Utah College of Medicine, Salt Lake City, Utah.

2 Present address: Department of Pediatrics, Baylor College of Medicine, Houston, Tex.

Appl Environ Microbiol. 1970 February; 19(2): 345-352
Copyright © 1970 American Society for Microbiology. All Rights Reserved.





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