Transposon Tn916 was transferred from Streptococcus faecalis to Mycoplasma hominis by a mating process resembling conjugation with a frequency of 10(-6) to 10(-7). Tn916 was inserted into the mycoplasmal chromosome in single and multiple copies.

The essential oil of Rosmarinus officinalis L. (rosemary) was obtained by hydro-distillation and analysed by gas chromatography-mass spectrometry. Sixty-two constituents were identified, representing 98.06% of the total oil content. Oxygenated monoterpenes were the predominant components. The rosemary oil was characterized as having prominent (> 5%) contents of camphor (18.9%), verbenone (11.3%...

Deibel, R. H. (American Meat Institute Foundation, Chicago, Ill.), and M. J. Kvetkas. Fumarate reduction and its role in the diversion of glucose fermentation by Streptococcus faecalis. J. Bacteriol. 88:858-864. 1964.-Fumarate diverts the normal fermentation of glucose by Streptococcus faecalis FB82, as shown by the production of increased amounts of CO(2), formate, acetate, and acetoin, and de...

AIM To compare the antimicrobial effect of 2% chlorhexidine, 2.5% sodium hypochlorite and MUMS containing 2% chlorhexidine. MATERIALS AND METHODS All of the above irrigants were examined on Enterococcus faecalis, Streptococcus mutans, Candida albicans, Lactobacillus casei and E. coli. A total of 0.5 CC of each solution and 0.5 CC of McFarland solution bacterium were added to each examination ...

Background: Bacteriocin is a peptidic toxin has many advantages to bacteria in their ecological niche and strong antibacterial activity. Objective: The aim of this study was evaluation bacteriocin using Streptococcus sanguinis isolated from human dental caries. Subjects Methods: Thirty five streptococcus isolates were diagnosed tested for production bacteriocin, then the optimal conditions dete...

Compounds AT2433-A1 (A1), AT2433-A2 (A2), AT2433-B1 (B1), and AT2433-B2 (B2) were isolated from the cultured broth of Actinomadura melliaura sp. nov. (SCC 1655). Structurally these materials are closely related to rebeccamycin (1), an indolocarbazole antitumor antibiotic. A1, A2, B1, and B2 were active against Staphylococcus aureus A9537, Streptococcus faecalis A20688, Streptococcus faecium (AT...

The genus Streptococcus includes organisms which are homofermentative, facultative with respect to oxygen, fastidious in their nutrient requirements, without cytochrome system, and are therefore considered to be catalase negative. Recent work in this laboratory revealed two strains of several hundred streptococci, screened from silage fermentations, that were capable of producing catalase. They...

Introduction: This interventional in-vitro study aimed to evaluate the antimicrobial activity of a new Nano Zinc OxideEugenol (NZOE) sealer in comparison with AH26 and Pulpdent common root canal sealers against endodontic pathogens. Methods: The antimicrobial efficacy of three sealers(NZOE, AH26 and Pulpdent)  against Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 25922), Streptococ...

Integrative and conjugative elements (ICEs), also called conjugative transposons, are genomic islands that excise, self-transfer by conjugation, and integrate in the genome of the recipient bacterium. The current investigation shows the intraspecies conjugative transfer of the first described ICEs in Streptococcus thermophilus, ICESt1 and ICESt3. Mitomycin C, a DNA-damaging agent, derepresses I...

Forrest, W. W. (University of Adelaide, Adelaide, South Australia). Adenosine triphosphate pool during the growth cycle in Streptococcus faecalis. J. Bacteriol. 90:1013-1018. 1965.-The adenosine triphosphate (ATP) pool has been studied throughout the growth cycle of Streptococcus faecalis. Normally, the pool is quantitatively related to the concentration of organisms and the growth rate, but de...