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Applied and Environmental Microbiology, September 2008, p. 5822-5831, Vol. 74, No. 18
0099-2240/08/$08.00+0     doi:10.1128/AEM.01093-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Diversity of Bacterial Endosymbionts of Environmental Acanthamoeba Isolates{triangledown} ,{dagger}

Stephan Schmitz-Esser, Elena R. Toenshoff, Susanne Haider, Eva Heinz, Verena M. Hoenninger, Michael Wagner, and Matthias Horn*

Department of Microbial Ecology, University of Vienna, 1090 Vienna, Austria

Received 15 May 2008/ Accepted 11 July 2008

Free-living amoebae are frequent hosts for bacterial endosymbionts. In this study, the symbionts of eight novel environmental Acanthamoeba strains isolated from different locations worldwide were characterized. Phylogenetic analysis revealed that they were related to one of four evolutionary lineages of amoeba symbionts recognized previously. This study provides evidence for the existence of only a small number of phylogenetically well-separated groups of obligate intracellular endosymbionts of acanthamoebae with global distribution.

* Corresponding author. Mailing address: Department of Microbial Ecology, University of Vienna, Althanstr. 14, 1090 Vienna, Austria. Phone: 43 1 4277 54393. Fax: 43 1 4277 54389. E-mail: horn{at}microbial-ecology.net

{triangledown} Published ahead of print on 18 July 2008.

{dagger} Supplemental material for this article may be found at http://aem.asm.org/.

Applied and Environmental Microbiology, September 2008, p. 5822-5831, Vol. 74, No. 18
0099-2240/08/$08.00+0     doi:10.1128/AEM.01093-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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