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Appl Environ Microbiol. 1971 September; 22(3): 339-343
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Specific Distribution of R Factors in Serratia marcescens Strains Isolated from Hospital Infections

S. Schaefler, J. Winter1, A. Catelli, J. Greene and B. Toharski2

Department of Health, Bureau of Laboratories and Public Health Research Institute of the City of New York, Inc., New York, New York 10016

ABSTRACT

Serratia marcescens strains from three hospitals in the city of New York were tested for antibiotic susceptibility patterns and the presence of transmissible antibiotic resistance factors. There appears to be a pattern characteristic for each hospital with regard to the sensitivity to nalidixic acid, tetracycline, chloramphenicol, and sulfonamides, whereas the resistance to ampicillin, cephalothin, and streptomycin is similar in the strains isolated from all three hospitals. In one hospital, a single type of R factor was found which transfers resistance to streptomycin, kanamycin, ampicillin, and sulfonamides, whereas strains isolated from a second hospital transfer only ampicillin resistance. No R factors could be detected in multiply resistant Serratia strains isolated in a third hospital. The presence of a single type of R factor probably reflects the relative ecological isolation of S. marcescens and could be useful for epidemiological studies of hospital infections with Serratia.

FOOTNOTES

1 Mount Sinai School of Medicine, City University of New York, and Beth Israel Medical Center, New York, N. Y. 10029.

2 Bellevue Hospital, New York, N. Y. 10016.

Appl Environ Microbiol. 1971 September; 22(3): 339-343
Copyright © 1971 American Society for Microbiology. All Rights Reserved.





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Copyright © 1971 by the American Society for Microbiology. All rights reserved.