BACKGROUND AND AIM: In recent years, propolis has been introduced as one the most efficient agents against cariogenic bacteria. However, due to the lack of data on the propolis collected from Kandovan (Easthern Azarbaijan, Iran), this study was designed to investigate the effect of this type of propolis on Streptococcus mutans (S. mutans).METHODS: In this experimental study, the ethanolic extra...

BACKGROUND Population analysis of viridans streptococci is important because these species are associated with dental caries, bacteremia, and subacute endocarditis, in addition to being important members of the human oral commensal microbiota. DESIGN In this study, we phylogenetically analyzed the rod shape-determining protein gene (rodA), which is associated with cellular morphology, cell di...

background: streptococcus pneumoniae and haemophilus influenzae type b (hib) is a leading cause of bacterial pneumonia, meningitis, and sepsis in children under 5-year of age. this study aims to estimate potentially preventable number of cases and deaths caused by hib and pneumococcal in iran.materials and methods:we used the burden of diseases model estimates of the world health organization (...

A Gram-negative streptococcus is associated with one form of fatal septicemia arising naturally in Macacus rhesus confined in laboratories. This streptococcus differs from Streptococcus pyogenes in its behavior to Gram's method of staining; in its slight fermentative powers; in the persistence of vitality for a very long time in its cultures; in its high degree of pathogenicity for certain lowe...

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 mannosidase activity since it is a glycoprote...

In a previous paper (1) it was reported that certain non-hemolytic streptococci from the human throat are capable of synthesizing large amounts of a carbohydrate from sucrose and raffinose. These organisms seem to be similar to those studied by Oerskov and Poulsen (2). When grown on the surface of agar containing 5 per cent sucrose or raffinose, large mucoid colonies are produced which are abou...

Institute of Dental Research Westmead Millennium Institutes Westmead Centre for Oral Health PO Box 533 Wentworthville NSW 2145 Tel (02) 98458772 Fax (02) 98457599 E-mail: [email protected] Infective endocarditis (IE) is a life threatening, endovascular infection occurring when bacteria enter the blood stream and adhere to heart valves. Mortality rates remain in the range of 1127% ....