AI Article Synopsis
- Fermented foods contain lactic acid bacteria (LAB) that can potentially change the bacteria in our digestive system.
- A study was conducted on rats to see how long three LAB species from cheese could stay in their mouths after eating the cheese daily for a week.
- Results showed that LAB were found in the rats' mouths 16 hours after eating and some remained a week later, indicating that these bacteria can persist in the oral cavity for several days.
Article Abstract
Fermented foods constitute a wide source of exogenous lactic acid bacteria (LAB) which could modify the endogenous microbiota of the consumer's digestive tract. This assumption depends on the ability of LAB to persist, at least transiently, in the oral cavity. The aim of this study was to evaluate the persistence of 3 LAB species, Streptococcus thermophilus, Lactococcus lactis, and Lacticaseibacillus paracasei in the oral cavity of rats by feeding them with a daily portion of model cheese containing the three bacteria for one week. Saliva samples were collected 16 h and one week after the last daily cheese intake. Their cheese bacteria contents were quantified by qPCR. When 16 h after cheese consumption, cheese bacteria were detected in the oral cavity of about ⅓ of the rats ranging from 10% to 10% of the total bacteria. One week after the last cheese intake, 1/8 LAB remains in the oral cavity. This study is a proof of concept showing that LAB can remain in the oral cavity several days after fermented food consumption with variability depending on individuals.
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| http://dx.doi.org/10.1016/j.fm.2022.104087 | DOI Listing |
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