Microbiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplementary figure
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wildschutte, H.
Right arrow Articles by Lawrence, J. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Wildschutte, H.
Right arrow Articles by Lawrence, J. G.
Agricola
Right arrow Articles by Wildschutte, H.
Right arrow Articles by Lawrence, J. G.
Microbiology 153 (2007), 1781-1789; DOI  10.1099/mic.0.2006/003616-0
© 2007 Society for General Microbiology

Differential Salmonella survival against communities of intestinal amoebae

Hans Wildschutte and Jeffrey G. Lawrence

Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15235, USA

Correspondence
Jeffrey G. Lawrence
jlawrenc{at}pitt.edu

Predation from intestinal amoebae may provide selective pressure for the maintenance of high genetic diversity at the Salmonella enterica rfb locus, whereby serovars better escape predators in particular environments depending on the O-antigens they express. Here, the hypothesis that amoebae from a particular intestinal environment collectively prefer one serovar over another is tested. Collections of Acanthamoeba, Tetramitus, Naegleria and Hartmannella were isolated from the intestinal tracts of several vertebrate hosts, including bullfrog tadpoles, goldfish, turtles and bearded dragons, and their feeding preferences were determined. Congeneric amoebae from the same environment had significantly similar feeding preferences. Strikingly, even unrelated amoebae – such as Naegleria and Tetramitus from goldfish – also had significantly similar feeding preferences. Yet amoebae isolated from different environments showed no similarity in prey choice. Thus, feeding preferences of amoebae appear to reflect their environment, not their taxonomic relationships. A mechanism mediating this phenotypic convergence is discussed.

Abbreviations: DS, diversifying selection; FDS, frequency-dependent selection; FLA, free-living Acanthamoeba

The GenBank/EMBL/DDBJ accession numbers for the amoebal DNA sequences determined in this paper are EF378666–EF378696; those for the bacterial sequences are EF491825–EF491854.

A supplementary figure is available with the online version of this paper.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
INT J SYST EVOL MICROBIOL MICROBIOLOGY J GEN VIROL
J MED MICROBIOL ALL SGM JOURNALS
Copyright © 2007 Society for General Microbiology.