title: Gram's stain for Legionella.
mesh_terms: D005840:Gentian Violet; D006801:Humans; D007875:Legionella / Q000302:isolation & purification*; D007877:Legionnaires' Disease / Q000175:diagnosis; D010619:Phenazines
chemical_list: C035863:Gram's stain; D010619:Phenazines; D005840:Gentian Violet