Related Experiment Video
Updated: Jun 28, 2026

Production of Chemicals by Klebsiella pneumoniae Using Bamboo Hydrolysate as Feedstock
Published on: June 29, 2017
Acid production from sugars and sugar alcohols by probiotic lactobacilli and bifidobacteria in vitro
A Haukioja1, E Söderling, J Tenovuo
1Institute of Dentistry, University of Turku, Turku, Finland. anna.haukioja@utu.fi
Abstract:
Some probiotic bacterial strains have been suggested to improve oral health. However, lactobacilli and bifidobacteria are associated with the progression of dental caries. The pH fall caused by 14 probiotic and dairy bacterial strains from glucose, lactose, sucrose, sorbitol and xylitol was followed. All strains used glucose, nine lactose and seven sucrose. Six of the lactobacilli caused a small decrease in pH with sorbitol and two with xylitol. None of the bifidobacteria fermented sugar alcohols. As all the strains could be considered acidogenic, more long-term clinical trials are needed before recommendations for oral health purposes can be made.
Related Concept Videos
Production of Organic Acids
Microbes in Food Production
Microbes in the Production of Fermented Foods
Production of Alcohol
Microbes in Beverage Production
Fates of Pyruvate
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...

