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Both encapsulated probiotics along with processed longan juice led to significant increases in colon lactobacilli, lactic acid and SCFA formation.

The objective of the study was to examine the influence of encapsulated Lactobacillus casei 01 combining with two types of pressurized-purple-rice drinks on colonizing the colon using a simulator of the human intestinal microbial ecosystem. Subsequently, the metabolic products of colon bacteria and various microflora were determined. The finding revealed that acetate which was the predominant short-chain fatty acid (SCFA) was found in both proximal and distal colons, while the combination of encapsulated L. casei 01 and germinated-purple-rice drinks gave rise to highest formation of SCFA. Significant impact of rice drinks could be observed on reducing ammonia production. The quantitative polymerase chain reaction analysis demonstrated that encapsulated L. casei 01 and encapsulated L. casei 01 plus rice drinks markedly increased concentration of colon lactobacilli and bifidobacteria by 2 and 1 log 16S rRNA gene copies/mL, respectively. On the contrary, undesirable bacteria such as clostridia and coliforms were significantly reduced with the influence of encapsulated L. casei 01 plus purple-rice drinks.

The prospect of Lactobacillus casei 01 and pasteurized purple-rice drinks on modulating colon microbiome by using a simulator of the human intestinal microbial ecosystem was investigated. Accordingly, L. casei 01 alone and with pasteurized purple-rice drink were administered into the proximal and distal colons. In consequence, some colon bacteria and their metabolic activities were examined. The results showed that upon modulating the colon microbiota by L. casei 01 alone with pasteurized germinated-purple-rice drink in the distal colon, acetate and propionate (short-chain fatty acids) were equivalently elevated but other treatments performed differently. Based on the profile of colon microbiota, most treatments stimulated the highest number of lactobacilli followed by bifidobacteria, while other undesirable bacteria were moderately diminished. In overall, larger gelatinized starch in the rice drinks enabled by pasteurization triggered off better modulating impact than by pressurization.