Streptococcus viridans

To understand the role of antibiotics, it is important to understand their effects on the fecal flora. The normal flora consists of a complex bacterial population with 400-500 distinct species of bacteria (table 2a). More than 99% of the total organisms are accounted for by non-sporeforming anaerobic rods [28] the four major species are Bacteroides, bifidobacteria, eubacteria and peptostrepto-cocci [29], Other common species are Escherichia coli, Streptococcus viridans, Streptococcus salivarius and lacto-bacilli. Mette et al. [30] clarified the prevalence of species in fecal flora by listing the four most common anaerobes Bacteroides spp., Eubacterium spp., Bifidobacterium spp. and anaerobic cocci) and three common aerobes E. coli spp., Enterococcus spp. and Lactobacillus spp.) (table 2b). 

Antibacterial activity. Water extract of the dried seed, on agar plate at concentration of 10 mg/mL, was inactive on Corynebacterium diphtheriae, Dipbcoccus pneumoniae, Staphylo coccus aureus, and Streptococcus viridans and produced weak activity on Streptococcus pyogenes b... 

Staphylococcus aureus Streptococcus pneumoniae Streptococcus pyogenes Streptococcus viridans group... 

Typical microorganism isolated from two separate blood cultures Streptococcus viridans, Streptococcus bovis, HACEK group, Staphylococcus aureus, or community-acquired enterococcal bacteremia without a primary focus or... 

Ciprofloxacin, a fluoroquinolone antibacterial agent (2 drops in the affected eye q. 15 minutes for the first six hours, then 2 drops q. 30 minutes for the remainder of the first day), is indicated for corneal ulcers caused by P. aeruginosa, S. aureus, S. epidermidis, S. pneumoniae, and possibly Serratia marcescens and Streptococcus viridans and for bacterial conjunctivitis caused by S. aureus and S. epidermidis, and possibly S. pneumoniae. 

Fraki JE, Peltonen L, Hopsu-Hava VK (1979) Allergy to various components of topical preparations in stasis dermatitis and leg ulcer. Contact Dermatitis 5 98-100 Friedberg CK, Rosen KM, Bienstock PA (1968) Vancomycin therapy for enterococcae and streptococcus viridans endocarditis. Arch Intern Med 122 134-138 Frost P, Weinstein GD, Gomez EC (1971) Methacycline and demeclocycline in relation to sunlight. JAMA 216 326-327... 

Both and H n.m.r. measurements on a bacterial dextran and its acetylated derivative and on a synthetic tri-O-benzyldextran have revealed the main features of their linear a-(l - 6)-linked structures. Bacterial dextrans from Streptococcus viridans B-1351, Streptobacterium dextranicum B-1254, and four strains of Leuconostoc mesenteroides have been subjected to methylation analysis.They differed with respect to the ease of methylation and subsequent hydrolysis of the methylated polysaccharides, owing to significant differences in the frequency and type of chain-branching. An enzymic approach has been used to obtain information on the frequency and distribution of chain-branching in dextrans. Thus, B-512 native dextran was treated with an endo-dextranase (from Pseudomonas UQM 733) and the products were examined by quantitative t.l.c. The relative amount of each oligosaccharide (i.e. linear isomalto-oligosaccharides of DP 2-5... 

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