Genetic Analysis of Bacterial Virulence Determinants in Bordetella pertussis and the Pathogenic Yersinia. With 2 Figures.- Gonococcal Pilus: Genetics and Structure. With 9 Figures.- Role of a Plasmid in the Pathogenicity of Yersinia Species. With 6 Figures.- Biochemical and Genetic Aspects of Pseudomonas Aeruginosa Virulence.- Genetic Determinants of Virulence in Shigella and Dysenteric Strains of Escherichia coli: Their Involvement in the Pathogenesis of Dysentery. With 2 Figures.- Cholera Toxin: Genetic Analysis, Regulation, and Role in Pathogenesis.- Molecular Biology of Fimbriae of Enterotoxigenic Escherichia coli. With 6 Figures.- Genetics of Escherichia coli Hemolysin.- Genes Determining Adhesin Formation in Uropathogenic Escherichia coli. With 2 Figures.- Genetic Basis of Iron Assimilation in Pathogenic Escherichia coli. With 1 Figure.- Surface Components of Escherichia coli That Mediate Resistance to the Bactericidal Activities of Serum and Phagocytes. With 5 Figures.- Molecular Cloning of Genes Encoding Gram-Positive Virulence Factors.- The Diphtheria Toxin Structural Gene. With 9 Figures.- Genetic Analysis of Streptococcus mutans Virulence.