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Infect Immun, February 1998, p. 843-848, Vol. 66, No. 2
0019-9567/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Enterococcus faecalis Localization in Experimental Endophthalmitis: Role of Plasmid-Encoded Aggregation Substance

Bradley D. Jett,1,* Rajeshwari V. Atkuri,1 and Michael S. Gilmore1,2

Department of Ophthalmology, Molecular Pathogenesis of Eye Infection Research Center, Dean A. McGee Eye Institute,1 and Department of Microbiology and Immunology,2 University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma

Received 29 August 1997/Returned for modification 10 October 1997/Accepted 17 November 1997

Enterococci have emerged as leading agents of nosocomial infection, yet relatively little is known about the pathogenesis of enterococcal disease. In previous studies, we developed an Enterococcus faecalis endophthalmitis infection model which provides unique opportunities to study the evolution of enterococcal disease by direct observation, as well as through sensitive electrophysiologic measures of organ function. The present study was designed to determine whether E. faecalis possesses traits that permit its attachment to mammalian tissues during infection. It was also of interest to determine whether a plasmid-encoded adhesin, aggregation substance, contributes to enterococcal localization or otherwise mediates adherence to alternate sites. These studies found that, in this model, enterococci attach to membranous structures occurring within the vitreous but that this attachment or the course or severity of disease is unaffected by the aggregation substance phenotype.


* Corresponding author. Mailing address: Department of Ophthalmology, University of Oklahoma Health Sciences Center, 608 Stanton L. Young Blvd., Oklahoma City, OK 73104. Phone: (405) 271-1084. Fax: (405) 271-3013. E-mail: brad-jett{at}ouhsc.edu.




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