Part I: Ecology, Physiology and Genetics of Legionella 1. Analysis of Iron Requirements and Siderophore Production Denise M. Burnside, and Nicholas P Cianciotto 2. The Pathometabolism of Legionella Studied by Isotopologue Profiling Klaus Heuner, Mareike Kunze, Fan Chen, and Wolfgang Eisenreich 3. Quantification of Viable but Non-culturable Cells of Legionella pneumophila