Part 1: Horizontal gene transfer among bacteria and bacteriophages.- Chapter 1: Horizontal gene transfer in bacteria, an overview of the mechanisms involved.- Chapter 2: Alternative ways to exchange DNA: unconventional conjugation among bacteria.- Chapter 3: Horizontal gene transfer between bacteriophages and bacteria: Antibiotic resistances and toxin production.- Chapter 4: Genomic islands and the evolution of multidrug-resistant bacteria Mario Juhas.- Chapter 5: Horizontal gene transfer and genome evolution in the phylum Actinobacteria.- Chapter 6: Photobacterium damselae: How horizontal gene transfer shaped two different pathogenic lifestyles in a marine bacterium.- Part 2: Horizontal gene transfer between bacteria and animals, plants, amoeba and fungi.- chapter 7: Horizontal gene transfer in Metazoa: Examples and Methods.- Chapter 8: Horizontal gene transfer between Wolbachia and animals.- Chapter 9: Horizontal gene transfer in obligate parasites.- Chapter 10: Associationbetween Horizontal gene transfer and Adaptation of gastric human pathogen Helicobacter pylori to host.- Chapter 11: The Rhizobiaceae bacteria transferring genes to higher plants Martha.- Chapter 12: Role of horizontal gene transfer in evolution of plant genome.- Chapter 13: Fungal horizontal gene transfer: a history beyond the Phylogenetic Kingdoms.- Chapter 14: Transfer of secondary metabolite gene clusters: assembly and reorganization ofthe b-lactam gene cluster from bacteria to fungi and arthropods.- Chapter 15: Horizontal gene transfer Among Neisseria species and humans.- Chapter 16: Implications of Lateral or Horizontal Gene Transfer from Bacteria to the Human Gastro-Intestinal System for Cancer Development and Treatment.- Chapter 17: Role of Horizontal Gene Transfer in Cancer Progression.