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Appl Environ Microbiol. 1965 November; 13(6): 1030-1037
Copyright © 1965 American Society for Microbiology. All Rights Reserved.

Ecology of Micrococcus radiodurans

K. L. Krabbenhoft1, A. W. Anderson and P. R. Elliker

Department of Microbiology, Oregon State University, Corvallis, Oregon

ABSTRACT

An ecological study of Micrococcus radiodurans indicated that microorganisms possessing the same morphological and radiation-resistance characteristics as that organism could be isolated from ground beef and from pork sausage. Further studies showed that such organisms also could be isolated from beef hides and from water from a creek adjacent to the packing plant from which the meat samples were obtained. Similar microorganisms were not isolated, however, from a limited number of samples of soil, hay, and fecal material. The use of high levels of {gamma}-radiation in the initial isolation procedures proved to be advantageous in inactivating most of the other microflora and facilitating the isolation of M. radiodurans. Control experiments indicated that M. radiodurans did not compete well with the microflora present in ground meat, soil, and beef hides. Preincubation before irradiation of meat and soil samples or enrichment culture techniques did not enhance the isolation of M. radiodurans. The presence of M. radiodurans in creek water suggested one possible source of this organism.

FOOTNOTES

1 Predoctoral trainee, National Aeronautics and Space Administration. Present address: Biology Department, New Mexico State University, University Park.

Appl Environ Microbiol. 1965 November; 13(6): 1030-1037
Copyright © 1965 American Society for Microbiology. All Rights Reserved.





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