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Nalidixic acid as a selective agent for the isolation of enterobacteria from river water

Published online by Cambridge University Press:  15 May 2009

Colin Hughes
Colin Hughes
Affiliation:
Biological Laboratory, University of Kent, Canterbury, Kent CT2 7NJ, England
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Summary

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Enterobacteria are more resistant to nalidixic acid than the majority of other Gram-negative organisms isolated from river water, so allowing their selection on MacConkey agar containing nalidixic acid. Selection is further improved by anaerobic incubation which, with nalidixic acid, virtually eliminates oxidase-positive strains such as Pseudomonas or Aeromonas.

Type
Research Article
Information
Journal of Hygiene , Volume 77 , Issue 1 , August 1976 , pp. 23 - 30
Copyright
Copyright © Cambridge University Press 1976

References

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