Preface. Introduction. Part 1 - Methods and tools in molecular epidemiolog.-1 Molecular typing of bacterial pathogens: a tool for the epidemiological study and control of infectious diseases.Part 2 - Contribution of population genetic.-2 Molecular epidemiology and evolutionary genetics of infectious diseases.-3 Population genetics and molecular epidemiology of infectious diseases. Part 3 - Contribution of population and evolutionary epidemiolog.-4 Modelling the dynamics of host-parasite interactions: basic principles.-5 Evolution of virulence: intuitions and models. Part 4 -Case studie.-6 Molecular epidemiology of tuberculosis.-7 Pneumocystis molecular phylogeny: a way to understand both pneumocystosis natural history and host taxonomy. 8 Hantavirus genetic diversity. Part 5 - New integrations.-9 Nasal methicillin-resistant coagulase-negative Staphylocococci: a reservoir of mecA gene for Staphylococcus aureus.-10 Molecular knowledge of mechanisms of helminth resistance: importance for diagnostic and epidemiology.-11 Molecular epidemiology of disease resistance genes with perspectives for researches on biological invasions and hybrid zones.-12 How does biodiversity influence the ecology of infectious disease?-13 Epidemiological interaction at the wildlife/livestock/human interface: can we anticipate emerging infectious diseases in their hotspots? A framework for building emerging diseases processes in their hot spots. Conclusion. Index.