EFFECT OF COAGGREGATION ON THE PATHOGENICITY OF ORAL BACTERIA

被引:53
作者
OCHIAI, K [1 ]
KURITAOCHIAI, T [1 ]
KAMINO, Y [1 ]
IKEDA, T [1 ]
机构
[1] NIHON UNIV,SCH DENT,DEPT ORAL SURG,MATSUDO,CHIBA 271,JAPAN
关键词
D O I
10.1099/00222615-39-3-183
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The pathogenicity of oral bacteria was studied by measuring the development of subcutaneous abscesses in mice after infection with Actinomyces viscosus and Streptococcus mitis either singly or as co-aggregated pairs. Heat-treated cells were also tested. The pathogenicity of the co-aggregates was examined in various viable and heat-treated combinations of the two bacterial species. More abscesses were formed by A. viscosus than S. mitis at all the bacterial concentrations tested. Also, abscess formation by co-aggregates of the two strains produced a higher percentage of abscess formation than those caused by infection with pure suspensions of A. viscosus or S. mitis. Co-aggregated cells were more resistant to phagocytosis and killing by neutrophils in vitro and in vivo. Furthermore, A. viscosus in co-aggregates were resistant to killing after engulfment by neutrophils. These results suggest that oral bacteria that are able to co-aggregate may resist phagocytosis, and this ability may be linked with pathogenicity.
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页码:183 / 190
页数:8
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