Ligilactobacillus saerimneri
| Ligilactobacillus saerimneri | |
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| Species: | Ligilactobacillus saerimneri
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| Binomial name | |
| Ligilactobacillus saerimneri (Pedersen & Roos 2004) Zheng et al. 2020
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| Type strain | |
| CCUG 48462; CIP 109907; DSM 16049; GDA154; JCM 15955; LMG 22087 | |
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Ligilactobacillus saerimneri is a Gram-positive species of lactic acid bacteria in the family Lactobacillaceae. Originally isolated from pig feces, it was described in 2004 as Lactobacillus saerimneri and later reassigned to the genus Ligilactobacillus in 2020 as part of a large phylogenomic reclassification of the genus Lactobacillus.[1]
Morphology and physiology
L. saerimneri cells are rod-shaped, non-spore-forming, and occur singly or in short chains. Unlike the closely related species Ligilactobacillus agilis, it is non-motile. The species is homofermentative and grows under anaerobic or microaerobic conditions, producing primarily lactic acid from a wide range of carbohydrates without gas formation. Its optimum growth temperature is around 37 °C, and the peptidoglycan type is A1c, containing meso-diaminopimelic acid. The genomic G+C content of the type strain is approximately 43 mol%.[2]
Ecology
Ligilactobacillus saerimneri was first recovered from the intestinal tract of domestic pigs. The species name is derived from Sæhrímnir, the mythological pig of Norse mythology, as a tribute to its porcine origin. It has also been reported in the gut microbiota of other livestock species. The bacterium grows optimally in mildly acidic to neutral conditions and demonstrates metabolic versatility in complex microbial environments.[3]
Genomics
The genome of strain GDA154 comprises a circular chromosome of approximately 2.05 Mb. Annotated features include genes for carbohydrate transport and metabolism, oxidative stress resistance, and exopolysaccharide biosynthesis. Comparative analysis has identified homologs of the agmatine deiminase pathway and several putative bacteriocin gene clusters, suggesting a role in microbial competition and gut colonization.[4]
Potential applications
L. saerimneri has attracted interest in biotechnological research. In particular, strain TBRC 5746 has been engineered to produce high titers of optically pure D-lactic acid, reaching up to 99 g/L in fed-batch fermentation systems.[5] Additionally, certain strains have shown inhibitory activity against Salmonella when co-cultured with other probiotic bacteria, highlighting its potential as a feed additive for improving gut health in livestock.[6]
References
- ^ Zheng, Jinshui; Wittouck, Stijn; Salvetti, Elisa (2020). "A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae". International Journal of Systematic and Evolutionary Microbiology. 70 (5): 2782–2858. doi:10.1099/ijsem.0.004107.
- ^ Pedersen, Carsten; Roos, Stefan (2004). "Lactobacillus saerimneri sp. nov., isolated from pig faeces". International Journal of Systematic and Evolutionary Microbiology. 54 (4): 1365–1368. doi:10.1099/ijs.0.03057-0.
- ^ "Species: Ligilactobacillus saerimneri". LPSN. Retrieved 14 July 2025.
- ^ "Ligilactobacillus saerimneri GDA154 – BacDive entry". BacDive. Retrieved 14 July 2025.
- ^ "Development of a novel D-lactic acid production platform based on Lactobacillus saerimneri". Journal of Microbiology and Biotechnology. 2023. doi:10.1007/s12275-023-00077-x.
- ^ "A two-strain association of Ligilactobacillus salivarius and Ligilactobacillus saerimneri inhibits Salmonella growth in vitro". Probiotics and Antimicrobial Proteins. 2023. doi:10.1007/s12602-023-10148-5.