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Infection and Immunity, March 2001, p. 1957-1960, Vol. 69, No. 3
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.3.1957-1960.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Pheromone Cross-Inhibition between Staphylococcus aureus and Staphylococcus epidermidis

Michael Otto,1,* Hartmut Echner,2 Wolfgang Voelter,2 and Friedrich Götz1

Mikrobielle Genetik,1 and Physiologisch-chemisches Institut, Abteilung für Physikalische Biochemie,2 Universität Tübingen, Tübingen, Germany

Received 30 August 2000/Returned for modification 13 October 2000/Accepted 20 November 2000

Cross-inhibition by quorum-sensing pheromones between Staphylococcus aureus and Staphylococcus epidermidis was investigated using all known S. aureus agr pheromone subgroups. All S. aureus subgroups were sensitive towards the S. epidermidis pheromone, with the exception of the recently identified subgroup 4. The subgroup 4 pheromone was also the only S. aureus pheromone able to inhibit the S. epidermidis agr response. The close relation of subgroup 4 to subgroup 1 suggests that subgroup 4 might have evolved from subgroup 1 by mutation under the selective pressure of competition with S. epidermidis. The competition between S. aureus and S. epidermidis by means of quorum-sensing cross talk seems to be generally in favor of S. epidermidis, which might explain the predominance of S. epidermidis on the skin and in infections on indwelling medical devices.

* Corresponding author. Mailing address: Mikrobielle Genetik, Universität Tübingen, Waldhäuserstr. 70/8, D-72076 Tübingen, Germany. Phone: 49-7071-2975938. Fax: 49-7071-295937. E-mail: michael.otto{at}uni-tuebingen.de.

Infection and Immunity, March 2001, p. 1957-1960, Vol. 69, No. 3
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.3.1957-1960.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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