Contributors.<br>E.A. Groisman, Preface.<br>H. Ochman, Evolution of Bacterial Pathogenesis.<br>J.R. Harper and T.J. Silhavy, Germ Warfare: The Mechanisms of Virulence Factor Delivery.<br>C. J. Dorman and S.G.J. Smith, Regulation of Virulence Gene Expression in Bacterial Pathogens.<br>A. Camilli, D.S. Merrell, and J.J. Mekalanos, Strategies to Identify Bacterial Pathogenicity Factors.<br>J.R. Alfano and A. Collmer, Mechanisms of Bacterial Pathogenesis in Plants: Familiar Foes in a Foreign Kingdom.<br>A.P. Boyd & G.R. Cornelis, Yersinia.<br>C.A. Scherer and S.I. Miller, Molecular Pathogenesis of Salmonellae.<br>P.J. Sansonetti, C. Egile, and C. Wennerås, Shigellosis: From Disease Symptoms to Molecular and Cellular Pathogenesis.<br>J.L. Puente and B.B. Finlay, Pathogenic Escherichia coli.<br>V.J. DiRita, Molecular Basis of Vibrio cholerae Pathogenesis.<br>T.L. Cover, D.E. Berg, M.J. Blaser, and H.L.T. Mobley, H. Pylori, Pathogenesis.<br>S.D. Gray-Owen, C. Dehio, T. Rudel, M. Naumann, and T.F. Meyer, Neisseria.<br>P.A. Cotter and J.F. Miller, Bordetella.<br>C.M. Tang, D.W. Hood, and E.R. Moxon, Pathogenesis of Haemophilus Influenzae Infections.<br>M. Caparon, Pathogenic Mechanisms in Streptococcal Diseases.<br>H. Fsihi, P. Steffen, and P. Cosart, Listeria Monocytogenes.<br>Index.