PATHOGENICITY OF BACTEROIDES-FRAGILIS GROUP IN RAT INTRAABDOMINAL ABSCESSES

被引:4
作者
JOTWANI, R [1 ]
GUPTA, U [1 ]
WATANABE, K [1 ]
UENO, K [1 ]
机构
[1] GIFU UNIV,SCH MED,INST ANAEROB BACTERIOL,GIFU 500,JAPAN
关键词
D O I
10.1111/j.1348-0421.1992.tb02108.x
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Attempts were made to study the pathogenicity of some strains of Bacteroides fragilis group in the rat intra-abdominal abscess model. Multiple intra-abdominal abscesses were produced in 50 to 70% of animals when an inoculum containing 10(9) CFU/ml of any of the five species of Bacteroides fragilis group was injected. Rising homologous antibody titers determined by indirect fluorescent antibody test were observed till the 3rd week when tested last, indirectly confirming the multiplication of the organisms as also evident by viable count of bacteria in the abscesses. In some cases in addition to inoculated organisms some intestinal bacteria like Escherichia coli, Proteus mirabilis and Streptococcus spp. were also recovered from the abscess pus. Studies with the electron microscope showed presence of capsular polysaccharide only in Bacteroides fragilis and Bacteroides thetaiotaomicron. It was doubtful in Bacteroides distasonis and absent in Bacteroides ovatus and Bacteroides vulgatus, suggesting that virulence factor beside the capsular polysaccharide may be playing a role. Further studies are required to investigate the virulence factor responsible for the pathogenicity of noncapsulated species.
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页码:1041 / 1049
页数:9
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