Legionella pneumophila Pathogenesis: Lessons Learned from Genomics.- Iron Assimilation and Type II Protein Secretion.- The Dot/Icm Type IVB Secretion System.- Life Cycle, Growth Cycles and Developmental Cycle of Legionella pneumophila.- Legionella in the Environment.- Regulation of the Legionella pneumophila Life Cycle.- Microbial Physiology.- Legionnaires' Disease-Clinical Picture.- Legionella pneumophila:Innate and Adaptive Immunity.- Nonspecific Stimulation of Immunity Against Legionella.- Interaction of Legionella pneumophila with Amoeba.