Black Pigmented Bacteria
Mostrando 13-18 de 18 artigos, teses e dissertações.
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13. Degradation of the human proteinase inhibitors alpha-1-antitrypsin and alpha-2-macroglobulin by Bacteroides gingivalis.
Various strains of black-pigmented Bacteroides species were grown on horse blood agar and suspended in human serum. After various times of incubation the effect of the bacteria on the serum was evaluated by polyacrylamide gel electrophoresis and "rocket" immunoelectrophoresis. The formation of trichloroacetic acid-soluble material in the suspensions and the
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14. Role of Fusobacterium nucleatum and Coaggregation in Anaerobe Survival in Planktonic and Biofilm Oral Microbial Communities during Aeration
Coaggregation is a well-characterized phenomenon by which specific pairs of oral bacteria interact physically. The aim of this study was to examine the patterns of coaggregation between obligately anaerobic and oxygen-tolerant species that coexist in a model oral microbial community. Obligate anaerobes other than Fusobacterium nucleatum coaggregated only poo
American Society for Microbiology.
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15. The use of monoclonal antibodies to detect Bacteroides gingivalis in biological samples.
Hybridomas were established which produce monoclonal antibodies specific for Bacteroides gingivalis, a pathogen associated with human periodontal disease. Spleen cells from BALB/c mice immunized with formalinized B. gingivalis were fused with Sp2/0-Ag14 myeloma cells. Of 1,050 wells with positive growth, 60 contained antibody reactive with the immunizing str
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16. Monocytic Cell Activation by Nonendotoxic Glycoprotein from Prevotella intermedia ATCC 25611 Is Mediated by Toll-Like Receptor 2
Lipopolysaccharide (LPS) preparations from gram-negative black-pigmented bacteria such as Porphyromonas gingivalis and Prevotella intermedia activate cells from non-LPS-responsive C3H/HeJ mice, but it is still unclear whether this activity is due to the unique structure of LPS or to a minor component(s) responsible for the activity in the preparation. A none
American Society for Microbiology.
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17. A novel component different from endotoxin extracted from Prevotella intermedia ATCC 25611 activates lymphoid cells from C3H/HeJ mice and gingival fibroblasts from humans.
A novel immunobiologically active fraction was prepared from a phenol-water extract of Prevotella intermedia ATCC 25611 by Sephadex G-100 column chromatography. The fraction consisted mainly of carbohydrate and protein and was devoid of fatty acid. The fraction showed high-molecular-weight bands (10,000 to 12,000) on deoxycholate polyacrylamide gel electroph
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18. Subgingival microbiota in squirrel monkeys with naturally occurring periodontal diseases.
The squirrel monkey (Saimiri sciureus) has been proposed as an in vivo model for the study of subgingival colonization by suspected periodontopathogens, such as black-pigmented porphyromonads and prevotellas (BP/P). However, the indigenous microbiota of the squirrel monkey has not been well described. Therefore, in order to more fully characterize the oral m