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Appl. Environ. Microbiol. doi:10.1128/AEM.01093-08
Copyright (c) 2008, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

Diversity of bacterial endosymbionts of environmental Acanthamoeba isolates

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

^* To whom correspondence should be addressed. Email: horn{at}microbial-ecology.net.

	Abstract

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 either 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.