Legionella gresilensis
Legionella gresilensis is a Gram-negative , aerobic , catalase-positive , non-spore-forming bacterium with a polar flagellum from the genus "Legionella" which was isolated from a shower from thermal spa water in the city Gréoux-les-Bains . 
<triplet> Gram-negative <subj> bacterium <obj> subclass of