It is a Gram-positive, catalase-negative, facultatively anaerobic rod-shaped bacterium.

[1] Lactobacillus iners is a normal inhabitant of the lower reproductive tract in healthy women, along with Lactobacillus crispatus, Lactobacillus jensenii, and Lactobacillus gasseri.

[2] The genomes of at least 15 strains have been sequenced and encode between 1,152 and 1,506 proteins.

Thus, this species has one of the smallest Lactobacillus genomes compared to other species, such as L. crispatus, which typically encodes more than twice as many proteins.

This Lactobacillales-related article is a stub.