Author affiliations: *Université de la Méditerranée, Marseille, France; †Hopital de Hautepierre, Strasbourg, France; ‡Faculté de Médecine, Strasbourg, France; and §Mutualité Sociale Agricole du Bas-Rhin, Strasbourg, France
Figure 1. Map of Europe showing the distribution of Ixodes ricinus(1). The areas where I. ricinus is prevalent are shaded in black and the prevalence of R. helvetica in I. ricinus, where estimated, is indicated.
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