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Applied and Environmental Microbiology, December 2007, p. 7926-7933, Vol. 73, No. 24
0099-2240/07/$08.00+0     doi:10.1128/AEM.01238-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Association of Vibrio cholerae O1 El Tor and O139 Bengal with the Copepods Acartia tonsa and Eurytemora affinis{triangledown}

Tonya K. Rawlings,1,3,{dagger} Gregory M. Ruiz,1 and Rita R. Colwell2,3*

Smithsonian Environmental Research Center, Edgewater, Maryland, 21037,1 Institute for Advanced Computer Sciences, University of Maryland, College Park, Maryland, 20742,2 Marine, Estuarine, and Environmental Sciences Program, University of Maryland, College Park, Maryland, 207423

Received 4 June 2007/ Accepted 12 October 2007

The association of Vibrio cholerae with zooplankton has been suggested as an important factor in transmission of human epidemic cholera, and the ability to colonize zooplankton surfaces may play a role in the temporal variation and predominance of the two different serogroups (V. cholerae O1 El Tor and O139) in the aquatic environment. To date, interactions between specific serogroups and species of plankton remain poorly understood. Laboratory microcosm experiments were carried out to compare quantitatively the colonization of two copepod species, Acartia tonsa and Eurytemora affinis, by each of the epidemic serogroups. V. cholerae O1 consistently achieved higher abundances than V. cholerae O139 in colonizing adults of each copepod species as well as the multiple life stages of E. affinis. This difference in colonization may be significant in the general predominance of V. cholerae O1 in cholera epidemics in rural Bangladesh where water supplies are taken directly from the environment.

* Corresponding author. Mailing address: Institute for Advanced Computer Sciences, University of Maryland, #296 Biomolecular Sciences Building, Room 3103, College Park, MD 20742. Phone: (301) 405-9550. Fax: (301) 314-6654. E-mail: rcolwell{at}umiacs.umd.edu

{triangledown} Published ahead of print on 19 October 2007.

{dagger} Present address: Department of Infectious Diseases, Stanford University Medical School, Beckman Center B239, Stanford, CA 94305.

Applied and Environmental Microbiology, December 2007, p. 7926-7933, Vol. 73, No. 24
0099-2240/07/$08.00+0     doi:10.1128/AEM.01238-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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