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Applied and Environmental Microbiology, September 1998, p. 3491-3495, Vol. 64, No. 9
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Symbiotic Relationship of Thiothrix spp. with an Echinodermdagger

Robin L. Brigmon1,* and Chantal De Ridder2

Environmental Biotechnology Section, Savannah River Technology Center, Westinghouse Savannah River Company, Aiken, South Carolina 29808,1 and Laboratoire de Biologie Marine, Université Libre de Bruxelles, Brussels, Belgium2

Received 22 December 1997/Accepted 15 June 1998

Immunoassay procedures were used to investigate the symbiotic relationship of Thiothrix spp. in the intestinal cecum of the spatangoid species Echinocardium cordatum. Thiothrix spp. were identified in nodule samples from E. cordatum digestive tubes based on microscopic examination, enzyme-linked immunosorbent assay, and indirect immunofluorescence. Thiothrix spp. protein made up as much as 84% of the total protein content of the nodules. This is the first identification of Thiothrix spp. internally symbiotic with marine invertebrates.

* Corresponding author. Mailing address: Environmental Biotechnology Section, Savannah River Technology Center, Westinghouse Savannah River Company, Bldg. 704-8T (TNX), Aiken, SC 29808. Phone: (803) 557-7719. Fax: (803) 557-7223. E-mail: r03.brigmon{at}srs.gov.

dagger Contribution of the Centre Interuniversitaire de Biologie Marine (CIBIM), Belgium.

Applied and Environmental Microbiology, September 1998, p. 3491-3495, Vol. 64, No. 9
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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