POTENTIAL PATHOGENIC PROPERTIES OF MEMBERS OF THE STREPTOCOCCUS-MILLERI GROUP IN RELATION TO THE PRODUCTION OF ENDOCARDITIS AND ABSCESSES

被引:39
作者
WILLCOX, MDP [1 ]
机构
[1] UNIV NEW S WALES,COOPERAT RES CTR EYE RES & TECHNOL,SYDNEY,NSW 2052,AUSTRALIA
关键词
D O I
10.1099/00222615-43-6-405
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The ''Streptococcus milleri'' (SMG) group have been shown to possess factors in vitro that may be involved in pathogenesis. All SMG strains are able to bind fibronectin via a cell-surface protein; the binding ranged from 12 to 198 mol/cell. Strains also bound to platelet-fibrin or fibrin clots and fibrinogen, giving maximum adhesion values of 16.5%, 21.8% and 151 mol/cell respectively. Members of the species S. constellatus produced thrombin-like activity. Lancefield group C SMG aggregated rat platelets, a bacterial cell-surface protein acting as mediator in the reaction. Most of the in-vitro factors did not correlate with each other, an indication that SMC strains possess a wide variety of pathogenic properties that may be involved in the production of abscesses or endocarditis. However, there was a correlation between the binding of large amounts of fibrinogen ( > 100 mol/cell) and the ability to aggregate platelets. This suggests that fibrinogen binding may aid in platelet aggregation.
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页码:405 / 410
页数:6
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