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Fermentation of sugars and sugar alcohols by plaque Lactobacillus strains

Artikel i vetenskaplig tidskrift
Författare Annica Almståhl
Peter Lingström
Lars Eliasson
Anette Carlén
Publicerad i Clinical Oral Investigations
Volym 17
Nummer/häfte 6
Sidor 1465-1470
ISSN 1432-6981
Publiceringsår 2013
Publicerad vid Institutionen för odontologi
Sidor 1465-1470
Språk en
Länkar dx.doi.org/10.1007/s00784-012-0832-...
https://gup.ub.gu.se/file/111933
Ämnesord Fermentation . Hyposalivation . Lactobacillus . pH . Sorbitol . Xylitol
Ämneskategorier Odontologi

Sammanfattning

Objective The objective was to analyse the ability of Lactobacillus strains isolated from supragingival plaque of subjects with hyposalivation and from healthy controls to ferment sugars and sugar alcohols. Material and methods Fifty strains isolated from interproximal plaque from subjects with radiation-induced hyposalivation (25 strains), subjects with primary Sjögren’s syndrome (16 strains) and from subjects with normal salivary secretion rate (9 strains) were tested. Growth and pH were determined after 24 and 48 h of anaerobic incubation in vials containing basal media with 1 % of glucose, fructose, sucrose, mannitol, sorbitol or xylitol. Results No differences between strains isolated from hyposalivated subjects and controls were detected. All strains lowered the pH to <5.0 from fructose and the majority of the strains from glucose and sucrose. A pH of <5.5 was seen for 52 % of the strains using mannitol, 50 % using sorbitol and 36 % using xylitol. The ability to produce acids from sugars and sugar alcohols was highest among strains of Lactobacillus rhamnosus, Lactobacillus casei and Lactobacillus paracasei and lowest among Lactobacillus fermentum strains. Conclusion A large number of Lactobacillus strains are able to ferment not only sugars but also the sugar substitutes mannitol, sorbitol and xylitol to pH levels critical for enamel demineralisation. Clinical relevance Our findings suggest that products containing mannitol, sorbitol and/or xylitol may contribute to the acidogenic potential of the dental plaque and especially in hyposalivated subjects with high numbers of lactobacilli.

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