PMID: 3298184Apr 1, 1987

Influence of specific growth rate and nutrient limitation upon the sensitivity of Escherichia coli towards chlorhexidine diacetate

The Journal of Applied Bacteriology
N E Wright, P Gilbert


The sensitivity of Escherichia coli to chlorhexidine has been assessed for cells grown in a chemostat at a variety of specific growth rates, under conditions of carbon, nitrogen, phosphorus and magnesium limitation. At slow rates of growth (ca 0.08/h) little difference in sensitivity was observed. As growth rate was increased, however, the sensitivity of nitrogen- and carbon-limited cells increased whilst that of magnesium- and phosphate-limited cells decreased. It was not possible to correlate the observed patterns of chlorhexidine sensitivity with any single measure of cell envelope composition (phospholipid content, lipopolysaccharide, envelope proteins, etc.). The results presented are not consistent, therefore, with any simple model for chlorhexidine binding or action and more probably reflect subtle interaction between chlorhexidine, phospholipid-lipopolysaccharide complexes and cations within the envelope.


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Related Concepts

Alkalescens-Dispar Group
Magnesium Measurement
Complex (molecular entity)
Outer Membrane Lipoproteins, Bacterial
Phosphate Measurement
Phosphorus Measurement
Chlorhexidine diacetate

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