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At least 145 records · Page 8Linked to original sources
PubMed1982

Histopathology of periodontitis ('broken-mouth') in sheep: a further consideration.

Histological observations of serial sections through the anterior teeth and periodontia of mature five-year-old sheep with 'broken-mouth' revealed two important histopathological features which advance the understanding of the disease mechanism. The periodontal pockets may extend not only in a vertical but also in a horizontal direction. The host response associated with microbial plaque at the advancing front and the more established regions showed obvious cellular differences. At the advancing front emigrating neutrophils are very evident, the pocket epithelium very thin, sometimes with microulceration. In the more established regions dense plasma cell infiltrates are common, with low numbers of neutrophils. It was concluded that broken-mouth periodontitis results from an active progression of plaque-forming oral microorganisms (of unknown species) advancing along the root surface between the cementum and periodontal tissues.

Animals↗
PubMed1997

Bactericidal effects of mouth rinses on oral bacteria.

The bactericidal efficacy of two types of Listerine; Listerine and Cool Mint Listerine, and povidone iodine on oral microorganisms, methicillin-resistant Staphylococcus aureus (MRSA), Streptococcus pyogenes, Helicobacter pylori and Candida albicans were examined. Most of the oral bacteria were killed completely by a 10-sec exposure to Listerine or Cool Mint Listerine. H. pylori, MRSA and C. albicans were also reduced by a 30-sec exposure to the Listerine mouth rinse. Bacteria in dental plaque were decreased by exposure to Listerine, Cool Mint Listerine, and povidone iodine for 30 seconds. Mouthwashing with Listerine for 30 seconds resulted in a decrease to approximately 1/100 of the viable bacterial counts in saliva. These bactericidal effects against bacteria in saliva and dental plaque indicated that Listerine and Cool Mint Listerine antiseptic are useful in oral cavity as antiseptic mouth rinses.

Adult↗
PubMed1987

Penicillin concentration in saliva and its influence on bacterial interference.

The aim of the investigation was to study the influence of various penicillin levels on the interference between alfa- and beta-streptococci based on antibiotic levels registered after oral intake of penicillin tablets. It was found that penicillin was released from ordinary sugar coated tablets already in the mouth resulting in concentrations in saliva above the MIC of most penicillin sensitive microorganisms during the first 2 min. This was followed by a decrease of the alfa-streptococcal flora. It was also shown that penicillin levels above the MIC of alfa-streptococci resulted in prolonged survival of beta-streptococci as compared to that noted at penicillin levels above the MIC of beta-streptococci but below that of the alfa-strains. At this latter level a synergistic effect between penicillin and interfering alfa-streptococcal strains could be demonstrated.

Administration, Oral↗
PubMedDate not supplied

The safe use of children's toys within the healthcare setting.

Toys are classed as a potential source of infection because they can become contaminated with microorganisms from unwashed hands, body fluids or from children putting them in their mouths. Environmental audits by infection control teams have shown that toys kept in healthcare settings are often dirty and not subject to the recommended cleaning protocols.

Baths↗
PubMed1996

Modifications of the microflora of the oral cavity arising during immunosuppressive chemotherapy.

Infections are a major cause of mortality among immunosuppressed cancer patients. The oral cavity is a possible reservoir for those microorganisms, both commensal and acquired, whose virulence is exacerbated in the immunosuppressed patient. The mouth consists of multiple habitats offering ecological niches to a variety of organisms. The object of this article is to review the literature devoted to quantitative and qualitative variations in the flora of the oral cavity during immunosuppressive treatment of cancer patients. Examination of these different studies reveals modifications of the commensal flora, as well as an increase in Gram negative rods, in staphylococci and in yeasts. These data confirm the necessity for constant surveillance of the oral cavity during chemotherapy.

Antineoplastic Agents↗
PubMed2004

[Microbial corrosion of dental alloy].

There is a very complicated electrolytical environment in oral cavity with plenty of microorganisms existing there. Various forms of corrosion would develop when metallic prosthesis functions in mouth. One important corrosive form is microbial corrosion. The metabolic products, including organic acid and inorganic acid, will affect the pH of the surface or interface of metallic prosthesis and make a change in composition of the medium, thus influencing the electron-chemical reaction and promoting the development of corrosion. The problem of develpoment of microbial corrosion on dental alloy in the oral environment lies in the primary condition that the bacteria adhere to the surface of alloy and form a relatively independent environment that promotes corrosion.

Corrosion↗
PubMed2006

A rare cause of Ludwig's angina by Morganella morganii.

Ludwig's angina is a rapidly spreading and potentially lethal infection involving the floor of the mouth and neck. We present a rare case of Ludwig's angina caused by an unusual microorganism, Morganella morganii, and the group D alpha-hemolytic streptococcus. To our knowledge, this is the first case of Ludwig's angina and deep neck infection caused by Morganella morganii. Adequate airway maintenance, appropriate use of antibiotics and surgical drainage resulted in survival of the patient without complications.

Aged↗
PubMed1976

Surface potential and adherence of oral streptococci to solid surfaces.

Strains of oral streptococci belonging to the same species but with different zeta-potential adhere with different strengths or become desorbed at different rates. However, strains of various species but with approximately the same zeta-potential also adhere differently. The adherence was found to be affected by the presence of polyvalent of counter ions in the microorganisms studied.

Adhesiveness↗
PubMed1988

[Plaque and plaque control].

Plaque, a causal factor for caries and periodontal diseases, is a habitat for various microorganisms. The considerable qualitative and quantitative variation of microorganisms, predominantly Streptococcus mutans, depends on age, thickness, and acidogenicity. The food passing through the mouth is also a crucial factor. Plaque removal (plaque control) is the most important measure for prevention of caries and gingivitis. Since mechanical removal of plaque is not adequate, chemical agents must also be used. Fluoride, for example, effectively inhibits plaque metabolism. The efficacy of enzymes, alkaloids, and antiseptics is limited. No active immunization against cariogenic streptococci is available at present. Mechanical, chemical, and biological measures of plaque control are effective only when the population is motivated to practice oral hygiene.

Alkaloids↗