Health and Fitness Key Step Identified in Legionnaire’s Disease Infection Process by Gary Kopycinski on June 16, 2011 Gary Kopycinski Author More in Health and Fitness: On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Rep. Kelly Condemns FDA Approval of Flavored E-Cigarettes May 6, 2026 Park Forest Aligns With Illinois Guidance on Childhood Vaccines Amid Federal Changes January 11, 2026 Bethesda, Maryland–(ENEWSPF)–June 16, 2011. NIH researchers have uncovered a key step in the biochemical sequence the bacterium which causes Legionnaire’s disease uses to reproduce inside the cells it infects.