Lactobacillus reuteri

From MicrobeWiki, the student-edited microbiology resource


Domain; Phylum; Class; Order; family [Others may be used. Use NCBI link to find]


NCBI: Taxonomy

Genus species

Description and Significance

Describe the appearance, habitat, etc. of the organism, and why you think it is important.

Genome Structure

Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?

Cell Structure, Metabolism and Life Cycle

Lactobacillus reuteri is a Gram-positive rod that forms chain arrangements and does not produce endospores. Some strains have also been shown to form relatively thin biofilms (5-7µm thick.) [1] L. reuteri is a mutualistic host-associated microbe, living in the guts of animals. As such, it requires a host habitat and is a mesophilic, facultative anaerobe with a preference for acidic environments. L. reuteri is an obligate heterofermentative microbe, producing carbon dioxide, ethanol, acetate, and lactic acid from glucose fermentation. It can also anaerobically metabolize glycerol, producing the antimicrobial reuterin (3-hydroxypropionaldehyde). [2] L. reuteri has also been shown to produce folate and cobalamin, also known as vitamin B12, nutrients that many animals, including humans, require.

Ecology and Pathogenesis

Habitat; symbiosis; biogeochemical significance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.


[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.


Page authored by _____, student of Prof. Jay Lennon at Michigan State University.