Streptococcus Sanguinis
Mostrando 37-47 de 47 artigos, teses e dissertações.
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37. Identification of Streptococcus sanguinis with a PCR-Generated Species-Specific DNA Probe
The objective of the present study was to design a PCR-generated DNA probe and determine the specificity of the probe for the identification of clinical isolates of Streptococcus sanguinis. To do this, we examined over 200 arbitrarily primed PCR (AP-PCR) amplicon patterns obtained with DNA from clinical isolates of S. sanguinis. A 1.6-kb DNA amplicon that wa
American Society for Microbiology.
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38. Comprehensive Evaluation of Streptococcus sanguinis Cell Wall-Anchored Proteins in Early Infective Endocarditis▿ †
Streptococcus sanguinis is a member of the viridans group of streptococci and a leading cause of the life-threatening endovascular disease infective endocarditis. Initial contact with the cardiac infection site is likely mediated by S. sanguinis surface proteins. In an attempt to identify the proteins required for this crucial step in pathogenesis, we search
American Society for Microbiology (ASM).
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39. Activity of Human β-Defensin 3 Alone or Combined with Other Antimicrobial Agents against Oral Bacteria
The in vitro activities of human β-defensin 3 (hBD-3) alone or combined with lysozyme, metronidazole, amoxicillin, and chlorhexidine were investigated with the oral bacteria Streptococcus mutans, Streptococcus sanguinis, Streptococcus sobrinus, Lactobacillus acidophilus, Actinobacillus actinomycetemcomitans, and Porphyromonas gingivalis. hBD-3 showed bacter
American Society for Microbiology.
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40. DNA Relatedness, Phenotypic Characteristics, and Antimicrobial Susceptibilities of Globicatella sanguinis Strains
DNA-DNA reassociation was performed on 15 strains of Globicatella sanguinis to compare their taxonomic status with phenotypic characterization. All 15 strains selected for DNA-DNA reassociation readily met the criteria for species relatedness. The relative binding ratio was 81% or greater at the optimal temperature and 76% or greater at the stringent tempera
American Society for Microbiology.
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41. Immunoglobulin A1 Protease Activity in Gemella haemolysans
The purpose of this study was to determine the occurrence and nature of immunoglobulin A1 (IgA1) protease activity in members of the genus Gemella and related taxa. Among a total of 22 Gemella strains belonging to the four species Gemella haemolysans, Gemella morbillorum, Gemella sanguinis, and Gemella bergeriae and four reference strains of the species Helc
American Society for Microbiology.
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42. Mannosidase Production by Viridans Group Streptococci
The production of mannosidase activity by all currently recognized species of human viridans group streptococci was determined using an assay in which bacterial growth was dependent on the degradation of the high-mannose-type glycans of RNase B and subsequent utilization of released mannose. RNase B is an excellent substrate for the demonstration of mannosid
American Society for Microbiology.
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43. Prevalence of the Amylase-Binding Protein A Gene (abpA) in Oral Streptococci
Salivary amylase binds specifically to a number of oral streptococcal species. This interaction may play an important role in dental plaque formation. Recently, a 585-bp gene was cloned and sequenced from Streptococcus gordonii Challis encoding a 20.5-kDa amylase-binding protein (AbpA). The goal of this study was to determine if related genes are present in
American Society for Microbiology.
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44. Effects of Compounds Found in Propolis on Streptococcus mutans Growth and on Glucosyltransferase Activity
Propolis, a resinous bee product, has been shown to inhibit the growth of oral microorganisms and the activity of bacterium-derived glucosyltransferases (GTFs). Several compounds, mainly polyphenolics, have been identified in this natural product. The present study evaluated the effects of distinct chemical groups found in propolis on the activity of GTF enz
American Society for Microbiology.
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45. Bactericidal Effects of a Fusion Protein of Llama Heavy-Chain Antibodies Coupled to Glucose Oxidase on Oral Bacteria
Enzymes such as lactoperoxidase and glucose oxidase (GOx) are used as antimicrobial agents in oral care products. Their low specificities and substantiveness can be reduced by covalent coupling of antimicrobial molecules to antibodies. Variable domains (VHH) derived from llama heavy-chain antibodies are particularly suited for such an approach. The antibodie
American Society for Microbiology.
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46. Molecular Analysis of Bacterial Species Associated with Childhood Caries
Although substantial epidemiologic evidence links Streptococcus mutans to caries, the pathobiology of caries may involve more complex communities of bacterial species. Molecular methods for bacterial identification and enumeration now make it possible to more precisely study the microbiota associated with dental caries. The purpose of this study was to compa
American Society for Microbiology.
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47. Identification of Clinically Relevant Viridans Group Streptococci by Sequence Analysis of the 16S-23S Ribosomal DNA Spacer Region
The feasibility of sequence analysis of the 16S-23S ribosomal DNA (rDNA) intergenic spacer (ITS) for the identification of clinically relevant viridans group streptococci (VS) was evaluated. The ITS regions of 29 reference strains (11 species) of VS were amplified by PCR and sequenced. These 11 species were Streptococcus anginosus, S. constellatus, S. gordon
American Society for Microbiology.