[Old and new pathologies proposed by epidemiology].

The results of a study made in the areas of Central Italy on a random community on the significant presence of cases with seroantibodies against Campylobacter, Yersinia, Legionella Pneumophila, Francisella Tularensis and Rotavirus confirm the hypothesis on the presence in the territory of microorganisms responsible. These positivities in man are not only single but also contemporaneous for at least two microorganisms. Hence the hypothesis of the presence in the environment (animals, soil, surface waters) of the microorganisms (Campylobacter, Yersinia, Legionella Pneumophila, Francisella Tularensis, and Rotavirus) responsible for the zoonoses of interest for man.