PURPOSE To detect predominant bacteria associated with radicular cysts and discuss in light of the literature. MATERIAL AND METHODS Clinical materials were obtained from 35 radicular cysts by aspiration. Cultures were made from clinical materials by modern laboratory techniques, they underwent microbiologic analysis. RESULTS The following are microorganisms isolated from cultures: Streptoco...

background and objectives: the most prevalent and worldwide oral disease is dental caries that affects a significant pro- portion of the world population. there are some classical approaches for control, prevention and treatment of this pathologic condition; however, the results are still not completely successful. therefore new methods are needed for better management of this important challen...

Streptococcus pyogenes Infection Induces Septic Arthritis with Increased Production of the Receptor Activator of the NFB Ligand Atsuo Sakurai, Nobuo Okahashi,* Ichiro Nakagawa, Shigetada Kawabata, Atsuo Amano, Takashi Ooshima, and Shigeyuki Hamada Departments of Oral and Molecular Microbiology, Pediatric Dentistry, and Oral Frontier Biology, Osaka University Graduate School of Dentistry, Suita-...

The mechanisms by which immunoglobulin Al (IgAl) protease activity may enable bacteria to evade the effect of specific secretory IgA (S-IgA) antibodies are not clear. A possibility which has received indirect experimental support is that bacteria, as a consequence of the protease activity, become coated with incompetent Fab. fragments instead of with intact antibody molecules. Using a combinati...

Streptococcus mutans have been proposed as the main causative agent of dental cavities. Dental caries is among the most common diseases in the world, this study was done to determine whether PCR analysis is useful to identify and even classify oral and other streptococci. 20 dental plaque samples were collected from teeth, 10 normal sample and 10 from persons with oral problems. The samples wer...

BACKGROUND Behçet's syndrome (BS) is a multisystem immune-related disease of unknown etiology. Recurrent aphthous stomatitis (RAS) is characterized by the presence of idiopathic oral ulceration without extraoral manifestation. The interplay between the oral microbial communities and the immune response could play an important role in the etiology and pathogenesis of both BS and RAS. OBJECTIVE...

Microorganisms from the oral flora were examined for the production of bacteriolytic substances. Among human viridans group streptococci, only one group of strains with thiol-dependent properties was shown to secrete enzymes with bacteriolytic activity on heat-killed cells of Micrococcus luteus on double-layer nutrient agar plates. By morphology, culture requirements, and biochemical properties...

AIMS To determine the causes of morbilliform rash and fever in a population with high vaccination coverage for measles and rubella. METHODS Comprehensive laboratory investigation additional to routine oral fluid testing of children presenting to primary care physicians in East Anglia, England. RESULTS Laboratory confirmation of infection was obtained in 93 (48%) of 195 children: parvovirus ...

The antimicrobial effects of red wine and its inherent components on oral microbiota were studied by using a 5-species biofilm model of the supragingival plaque that includes Actinomyces oris, Fusobacterium nucleatum, Streptococcus oralis, Streptococcus mutans and Veillonella dispar. Microbiological analysis (CFU counting and confocal laser scanning microscopy) of the biofilms after the applica...

The purpose of the present study was to determine the antibacterial activity of oolong tea extract on oral streptococci, including Streptococcus mutans and Streptococcus sobrinus, and to identify the response to its components. Antibacterial activity was found when the extract was added to S. mutans cells in chemically defined medium but not in complex broth media. Further, pretreatment with bo...