Journal
NUTRIENTS
Volume 14, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/nu14050974
Keywords
faecal microbiota; functional gastrointestinal disorders (FGIDs); colic; functional constipation
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This systematic review examines the differences in fecal microbiota between infants and young children with FGIDs and healthy controls. Despite methodological limitations, the data suggest alterations in microbial diversity, stability, and colonization patterns in FGIDs patients. Increases in pathogenic bacteria and decreases in beneficial bacteria are observed in colicky infants and children with functional constipation.
Functional gastrointestinal disorders (FGIDs) refer to gastrointestinal tract issues that lack clear structural or biochemical causes. Their pathophysiology is still unclear, but gut microbiota alterations are thought to play an important role. This systematic review aimed to provide a comprehensive overview of the faecal microbiota of infants and young children with FGIDs compared to healthy controls. A systematic search and screening of the literature resulted in the inclusion of thirteen full texts. Most papers reported on infantile colic, only one studied functional constipation. Despite methodological limitations, data show alterations in microbial diversity, stability, and colonisation patterns in colicky infants compared to healthy controls. Several studies (eight) reported increases in species of (pathogenic) Proteobacteria, and some studies (six) reported a decrease in (beneficial) bacteria such as Lactobacilli and Bifidobacteria. In addition, accumulation of related metabolites, as well as low-grade inflammation, might play a role in the pathophysiology of infantile colic. Infants and toddlers with functional constipation had significantly lower levels of Lactobacilli in their stools compared to controls. Microbial dysbiosis and related changes in metabolites may be inherent to FGIDs. There is a need for more standardised methods within research of faecal microbiota in FGIDs to obtain a more comprehensive picture and understanding of infant and childhood FGIDs.
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