Phenotypic and genetic diversity of the species Lactobacillus rhamnosus

C.D. Ceapa

Research output: Thesisinternal PhD, WU


The thesis explores the diversity of Lactobacillus rhamnosus, a species from which strains are studied for their anti-inflammatory, anti-allergic, and diarrhea preventing effects. The work combines observations on the behavior of the bacteria in a simplified laboratory setting (use of carbohydrates, immune modulation effects, anti-pathogenic effects) with genomic information obtained by sequencing, with the aim to pinpoint genes that could be relevant for bacterial survival and metabolic capacities. Phenotypic and genotypic profiling analyses congruently revealed that carbohydrate metabolism and transport is essential for this species’ adaptation to the environment. Genotype–phenotype correlation analysis enabled us to predict and then experimentally verify genes responsible for the utilization of L-Sorbose, L-Fucose α-D-Methyl Glycoside.

Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
  • Kleerebezem, Michiel, Promotor
  • Knol, Jan, Promotor
  • Lambert, J., Promotor, External person
Award date12 Jan 2016
Place of PublicationWageningen
Print ISBNs9789462576285
Publication statusPublished - 2016


  • fermentation products
  • probiotics
  • intestinal microorganisms
  • lactic acid bacteria
  • strains
  • medicinal properties
  • genomics
  • nutrition and health


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