The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.

<h4>Background</h4>Lacticaseibacillus (formerly Lactobacillus) rhamnosus is widely used in probiotics or food supplements to promote microbiome health and may also be part of the normal microbiota of the human gastrointestinal tract. However, it rarely also causes invasive or severe infe...

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Main Authors: Phillip P Santoiemma, Susan E Cohn, Samuel W M Gatesy, Alan R Hauser, Saaket Agrawal, Maria E Theodorou, Kelly E R Bachta, Egon A Ozer
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2024-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0300843
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author Phillip P Santoiemma
Susan E Cohn
Samuel W M Gatesy
Alan R Hauser
Saaket Agrawal
Maria E Theodorou
Kelly E R Bachta
Egon A Ozer
author_facet Phillip P Santoiemma
Susan E Cohn
Samuel W M Gatesy
Alan R Hauser
Saaket Agrawal
Maria E Theodorou
Kelly E R Bachta
Egon A Ozer
author_sort Phillip P Santoiemma
collection DOAJ
description <h4>Background</h4>Lacticaseibacillus (formerly Lactobacillus) rhamnosus is widely used in probiotics or food supplements to promote microbiome health and may also be part of the normal microbiota of the human gastrointestinal tract. However, it rarely also causes invasive or severe infections in patients. It has been postulated that these infections may originate from probiotics or from endogenous commensal reservoirs. In this report, we examine the population structure of Lacticaseibacillus rhamnosus and investigate the utility of using bacterial genomics to identify the source of invasive Lacticaseibacillus infections.<h4>Methods</h4>Core genome phylogenetic analysis was performed on 602 L. rhamnosus genome sequences from the National Center for Biotechnology public database. This information was then used along with newly generated sequences of L. rhamnosus isolates from yogurt to investigate a fatal case of L. rhamnosus endocarditis.<h4>Results</h4>Phylogenetic analysis demonstrated substantial genetic overlap of L. rhamnosus isolates cultured from food, probiotics, infected patients, and colonized individuals. This was applied to a patient who had both consumed yogurt and developed L. rhamnosus endocarditis to attempt to identify the source of his infection. The sequence of the isolate from the patient's bloodstream differed at only one nucleotide position from one of the yogurt isolates. Both isolates belonged to a clade, identified here as clade YC, composed of mostly gastrointestinal isolates from healthy individuals, some of which also differed by only a single nucleotide change from the patient's isolate.<h4>Conclusions</h4>As illustrated by this case, whole genome sequencing may be insufficient to reliably determine the source of invasive infections caused by L. rhamnosus.
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spelling doaj-art-a9b4cdcebe1c4bed9ecdcc5adb942b002025-08-23T05:32:19ZengPublic Library of Science (PLoS)PLoS ONE1932-62032024-01-01198e030084310.1371/journal.pone.0300843The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.Phillip P SantoiemmaSusan E CohnSamuel W M GatesyAlan R HauserSaaket AgrawalMaria E TheodorouKelly E R BachtaEgon A Ozer<h4>Background</h4>Lacticaseibacillus (formerly Lactobacillus) rhamnosus is widely used in probiotics or food supplements to promote microbiome health and may also be part of the normal microbiota of the human gastrointestinal tract. However, it rarely also causes invasive or severe infections in patients. It has been postulated that these infections may originate from probiotics or from endogenous commensal reservoirs. In this report, we examine the population structure of Lacticaseibacillus rhamnosus and investigate the utility of using bacterial genomics to identify the source of invasive Lacticaseibacillus infections.<h4>Methods</h4>Core genome phylogenetic analysis was performed on 602 L. rhamnosus genome sequences from the National Center for Biotechnology public database. This information was then used along with newly generated sequences of L. rhamnosus isolates from yogurt to investigate a fatal case of L. rhamnosus endocarditis.<h4>Results</h4>Phylogenetic analysis demonstrated substantial genetic overlap of L. rhamnosus isolates cultured from food, probiotics, infected patients, and colonized individuals. This was applied to a patient who had both consumed yogurt and developed L. rhamnosus endocarditis to attempt to identify the source of his infection. The sequence of the isolate from the patient's bloodstream differed at only one nucleotide position from one of the yogurt isolates. Both isolates belonged to a clade, identified here as clade YC, composed of mostly gastrointestinal isolates from healthy individuals, some of which also differed by only a single nucleotide change from the patient's isolate.<h4>Conclusions</h4>As illustrated by this case, whole genome sequencing may be insufficient to reliably determine the source of invasive infections caused by L. rhamnosus.https://doi.org/10.1371/journal.pone.0300843
spellingShingle Phillip P Santoiemma
Susan E Cohn
Samuel W M Gatesy
Alan R Hauser
Saaket Agrawal
Maria E Theodorou
Kelly E R Bachta
Egon A Ozer
The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
PLoS ONE
title The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
title_full The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
title_fullStr The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
title_full_unstemmed The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
title_short The global population stru cture of Lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis.
title_sort global population stru cture of lacticaseibacillus rhamnosus and its application to an investigation of a rare case of infective endocarditis
url https://doi.org/10.1371/journal.pone.0300843
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