legionella shakespearei legionella shakespearei legionella shakespearei is a gram-negative, weakly oxidase-positive, catalase-positive bacterium with a single polar flagellum from the genus legionella which was isolated from a cooling tower in stratford-upon-avon in england. l. shakespearei is named after william shakespeare because it was isolated in stratford-upon-avon. legionella shakespearei scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: legionellales family: legionellaceae genus: legionella species: l. shakespearei binomial name legionella shakespeareiverma et al. 1992 type strain atcc 49655, ccug 31228 a, cdc 214, cip 103541, nctc 12829