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Pseudomonas-Candida Interactions: An Ecological Role for Virulence Factors

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Science  21 Jun 2002:
Vol. 296, Issue 5576, pp. 2229-2232
DOI: 10.1126/science.1070784

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Abstract

Bacterial-fungal interactions have great environmental, medical, and economic importance, yet few have been well characterized at the molecular level. Here, we describe a pathogenic interaction betweenPseudomonas aeruginosa and Candida albicans, two opportunistic pathogens. P. aeruginosa forms a dense biofilm on C. albicans filaments and kills the fungus. In contrast,P. aeruginosa neither binds to nor kills yeast-form C. albicans. Several P. aeruginosa virulence factors that are important in disease are involved in the killing of C. albicans filaments. We propose that many virulence factors studied in the context of human infection may also have a role in bacterial-fungal interactions.

  • * To whom correspondence should be addressed. E-mail: rkolter{at}hms.harvard.edu

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