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Antimicrob Agents Chemother


Title:Plasmid-associated hemolysin and aggregation substance production contribute to virulence in experimental enterococcal endocarditis
Author(s):Chow JW; Thal LA; Perri MB; Vazquez JA; Donabedian SM; Clewell DB; Zervos MJ;
Address:"Department of Medicine, William Beaumont Hospital, Royal Oak, Michigan 48073"
Journal Title:Antimicrob Agents Chemother
Year:1993
Volume:37
Issue:11
Page Number:2474 - 2477
DOI: 10.1128/AAC.37.11.2474
ISSN/ISBN:0066-4804 (Print) 1098-6596 (Electronic) 0066-4804 (Linking)
Abstract:"A rabbit endocarditis model was utilized to evaluate the virulence conferred by the conjugative plasmid pAD1 with the following strains: Enterococcus faecalis plasmid-free FA2-2 and FA2-2 containing plasmids pAD1 (hemolysin and aggregation substance positive), pAM9058 (insertional inactivation of hemolysin), and pAM944 or pAM947 (insertional inactivation of aggregation substance). All isolates were similar in ability to produce endocarditis. Mean vegetation weight was greater in animals inoculated with strains that produced aggregation substance (P < 0.01). Mortality was significantly increased in animals given FA2-2 containing pAD1 compared with those given all other strains (P < 0.01). These results suggest that the combination of hemolysin and aggregation substance is associated with increased mortality and that vegetation weight is associated with production of aggregation substance in experimental E. faecalis endocarditis"
Keywords:"Animals Bacterial Proteins/*biosynthesis/genetics Colony Count, Microbial Endocarditis, Bacterial/*metabolism/microbiology/pathology *Enterococcus faecalis/genetics/metabolism Female Gram-Positive Bacterial Infections/*metabolism/microbiology/pathology He;"
Notes:"MedlineChow, J W Thal, L A Perri, M B Vazquez, J A Donabedian, S M Clewell, D B Zervos, M J eng Research Support, Non-U.S. Gov't 1993/11/01 Antimicrob Agents Chemother. 1993 Nov; 37(11):2474-7. doi: 10.1128/AAC.37.11.2474"

 
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