Strain Marseille-P2915T, a Gram-positive, facultative anaerobic and nonmotile coccus, was isolated from the gastric lavage of a patient with severe anaemia. The 16S rRNA and rpoB gene comparison exhibited a sequence identity of 98.7 and 92.6% with Streptococcus infantis strain JCM 10157T, respectively, collocating it within the 'Streptococcus mitis' group. On the basis of phenotypic and genomic...

Despite the benefits of MALDI-TOF MS technology (Matrix-Assisted Laser Desorption-Ionization Time-Of-Flight Mass Spectrometry) reported worldwide and the continuous improving of the available databases, discrimination between Streptococcus pneumoniae and closely related species within the Streptococcus mitis group (SMG) using this methodology has been suboptimal. However, the accurate identific...

A comparative study of 60 strains of nutritionally variant streptococci (NVS) with 34 strains of Streptococcus mitis and 37 strains of Streptococcus sanguis II showed the presence of a red chromophore which was absent in the other streptococcal species. By using the conventional microbiological tests, only small differences were found between the NVS and the two other related species. In contra...

BACKGROUND Non-mutans low pH oral streptococci are postulated to contribute to caries etiology. OBJECTIVE This study was undertaken to investigate whether the acidogenicity and acid tolerance of clinical strains of Streptococcus oralis and Streptococcus mitis correlate with health or early-stage enamel caries. DESIGN S. oralis and S. mitis were isolated from plaque samples taken from the oc...

OBJECTIVES Use of alternative medicine to control oral streptococci is a new topic worthy of further investigation. This study aimed to elucidate the dose-dependent anti-bacterial activity of crude aqueous extract of ripe Morinda citrifolia L. (Family: Rubiaceae) fruits against oral streptococci i.e. Streptococcus mutans and Streptococcus mitis, that cause dental caries in humans. METHODS Fre...

Seven streptococcal isolates from the mitis group were analyzed for the presence of pneumococcal gene homologues by comparative genomic hybridization studies with microarrays based on open reading frames from the genomes of Streptococcus pneumoniae TIGR4 and R6. The diversity of pneumolysin (ply) and neuraminidase A (nanA) gene sequences was explored in more detail in a collection of 14 S. pseu...

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% ....

The purpose of this study was to investigate the capability Streptococcus thermophilus TISTR 458 on hyaluronic acid (HA) production by using various carbon sources including glucose, sucrose and sugarcane molasses. HA determined a turbidity assay precipitation with cetyltrimethylammonium bromide (CTAB) sugar content analysed sulphuric acid-UV spectrophotometry method. results showed that S. pro...

The non-hemolytic streptococci of the human throat form, simultaneously, one of the oldest and least known groups of the genus. These familiar but illdefined organisms are usually referred to as the "salivarius group," as "Streptococcus viridars" and "indifferent streptococci" according to the degree of greening produced in blood agar, or simply as the "mouth streptococcus." In their early clas...

OBJECTIVE Dental caries, periodontitis and other mucosal diseases are caused by a complex community of microorganisms. This study aimed to investigate the antimicrobial properties of saponins of four important oil yielding medicinal plant extracts on selected oral pathogens that are involved in such diseases. MATERIALS AND METHODS Saponins were extracted from Bauhinia purpurea, Madhuca longif...