Short-chain fatty acids (SCFA) are widely used as feed additives in poultry for the control of pathogenic bacteria, such as Salmonella enteritidis. Recently, a new range of products was developed in which SCFA are encapsulated in mineral carriers, resulting in a slow release during the transport of these carriers through the intestinal tract. To test the efficacy of this type of products agains...

Production of propionic acid by Propionibacterium shermanii CDB 10014 was enhanced by a pH value of 6.5 and by temperatures in the range 35-37 °C. Depending on the type of yeast extract, succinic acid can be produced in higher proportions, with decreasing propionic acid yields. With respect to propionic acid production, Difco yeast extract has shown the best results when yeast extract preparati...

Background—Propionic acid derived from colonic bacterial fermentation contributes substantially to overall propionate load in children with disorders of propionate metabolism, and its reduction is important for adequate metabolic control. Aims—To evaluate the in vitro and in vivo eVects of antibiotic treatment on propionate production by colonic bacteria, and plasma propionate concentrations in...

The mechanism of the formation of propionate by the propionic acid bacteria has remained uncertain for many years but current evidence indicates its formation is by decarboxylation of succinate (review by van Niel, 1952). Johns (1951a) demonstrated that Micrococcus lactilyticus decarboxylates succinate very rapidly to propionate. Delwiche (1948) and Johns (1951b) have concluded that propionate ...

Fermentation of dietary fibers by colonic microbiota generates short-chain fatty acids (SCFAs), e.g., propionic acid and butyric acid, which have been described to have "anti-obesity properties" by ameliorating fasting glycaemia, body weight and insulin tolerance in animal models. In the present study, we therefore investigate if propionic acid and butyric acid have effects on lipolysis, de nov...

The evidence for this scheme is : (a ) Washed suspensions of the organism grown on lactate attack, under anaerobic conditions, pyruvate, oxalacetate, L-malate, fumarate and succinate, but not D-tartrate. (b) Organisms grown on D-tartrate attack it and all the substances listed in (a ) except lactate. ( c ) Succinic acid is quantitatively decarboxylated to propionic acid and carbon dioxide. (d )...