History Organism was thought to be unique, given new genus and species name Legionella pneumophila Epidemiological search revealed outbreak in same hotel two years earlier o Culture problems because organisms Do not grow on common laboratory media Do not readily stain BIOL 533 Lecture 14BIOL 533 4 Lecture 14 History • Organism was thought to be unique, given new genus and species name: Legionella pneumophila – Epidemiological search revealed outbreak in same hotel two years earlier • Culture problems because organisms: – Do not grow on common laboratory media – Do not readily stain