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Infection and Immunity, November 2005, p. 7768-7771, Vol. 73, No. 11
0019-9567/05/$08.00+0     doi:10.1128/IAI.73.11.7768-7771.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Differential Use of the Two High-Oxygen-Affinity Terminal Oxidases of Brucella suis for In Vitro and Intramacrophagic Multiplication

Séverine Loisel-Meyer,1 Maria Pilar Jiménez de Bagüés,2 Stephan Köhler,1 Jean-Pierre Liautard,1 and Véronique Jubier-Maurin1*

Institut National de la Santé et de la Recherche Médicale U-431, Université Montpellier II, 34095 Montpellier, France,1 Unidad de Sanidad Animal, CITA, Gobierno de Aragon, AP. 727, 50080 Zaragoza, Spain2

Received 2 June 2005/ Returned for modification 15 July 2005/ Accepted 22 July 2005

Expression of the high-oxygen-affinity cytochrome cbb3 and cytochrome bd ubiquinol oxidases of Brucella suis was studied in vitro and in the intramacrophagic niche, which was previously proposed to be oxygen limited. The cytochrome cbb3 oxidase was exclusively expressed in vitro, whereas the cytochrome bd oxidase was preferentially used inside macrophages and contributed to intracellular bacterial replication.

* Corresponding author. Mailing address: INSERM U-431, Université Montpellier II, Place E. Bataillon, CC100, 34095 Montpellier Cedex 05, France. Phone: (33) 4 67 14 42 38. Fax: (33) 4 67 14 33 38. E-mail: v-maurin{at}univ-montp2.fr.

Editor: D. L. Burns

Infection and Immunity, November 2005, p. 7768-7771, Vol. 73, No. 11
0019-9567/05/$08.00+0     doi:10.1128/IAI.73.11.7768-7771.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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