Massilia (bacterium)
The genus ''Massilia'' belongs to the family Oxalobacteriaceae, and describes a group of gram-negative, motile, rod-shaped cells. They may contain either peritrichous or polar flagella. This genus was first described in 1998, after the type species, '' Massilia timonae'', was isolated from the blood of an immunocompromised patient. The genus was named after the old Greek and Roman name for the city of Marseille, France, where the organism was first isolated. The ''Massilia'' genus is a diverse group that resides in many different environments, has many heterotrophic means of gathering energy, and is commonly found in association with plants. Culture of ''Massilia'' Isolation of ''Massilia'' sp. commonly occurs on Reasoner's 2A (R2A) agar. Colonies are often shades of white, yellow, or orange, but may be blue-purple if producing the compound violacein. As of 2022, 16S rRNA-based phylogenetic trees place the ''Massilia'' genus within a polyphyletic group of the Oxalobacteriacea ...
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