costaricensis ‘from Costa Rica’, the country from where the type strain was isolated) is a species of bacterium of the genus Listeria.

It is a Gram-stain-positive, rod-shaped bacterium, non-spore-forming and facultatively anaerobic.

Colonies are opaque, yellow-pigmented (atypical of Listeria species), with a flat shape and entire margin on BHI.

It is presumably non-pathongenic due to the lack of haemolysis and pathogenicity genes on its genome.

[1] The species was isolated in August 2015 from the drainage system of a food-processing plant in the province of Alajuela, northern Costa Rica, through to a joint investigation of scientists from the Costa Rica Institute of Technology (ITCR) in Cartago, Costa Rica and researchers from the Pasteur Institute, Paris, France.