Electrical impedance measurements: rapid method for detecting and monitoring microorganisms

Author:

Cady P,Dufour S W,Shaw J,Kraeger S J

Abstract

A conceptually simple and east-to-use technique is described that uses continuous impedance measurements for automated monitoring of microbial growth and metabolism. The method has been applied to a wide range of microorganisms. Optical clarity is not required. The sensitivity and reproducibility of the method are demonstrated. The mechanism whereby microbial growth alters the impedance of the medium is discussed, as well as potential applications of the method to clinical microbiology.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

Reference13 articles.

1. Bacterial identification by microcalorimetry;Boling E. A.;Nature (London),1973

2. Cady P. 1975. Rapid automated bacterial identification by impedance measurement p. 73-99. In C. G. Heden and T. Illeni (ed.) New approaches to the identification of microorganisms. John Wiley and Sons Inc. New York.

3. Cady P. 1978. Progress in impedance measurements in microbiology p. 199-239. In A. N. Sharpe and P. S. Clarke (ed.) Mechanizing microbiology. Charles C Thomas Publisher Springfield Ill.

4. Hadley W. K. W. Kazinka and G. Senyk. 1975. Early detection of microbial growth in blood cultures by electrical impedance measurements. International Conference on Mechanized Microbiology Ottawa.

5. Hadley W. K. and G. Senyk. 1975. Early detection of microbial metabolism and growth by measurement of electrical impedance p. 12-21. In D. Schlessinger (ed.) Microbiology-1975. American Society for Microbiology Washington D.C.

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