[Bacterial zoonoses: emerging concepts].

Bacterial zoonoses are evolving with changes in society, climate and lifestyles. A hierarchy of non food-borne zoonoses was recently proposed in France, and includes characteristics such as severity criteria and bioterrorism potential. The creation of specific networks and reference centers has provided the means to monitor the emergence (or re-emergence) of zoonoses such as brucellosis and Q fever. Molecular tools have facilitated the detection of bacteria that are transmitted by arthropod vectors (ticks, fleas, etc.) and that cause diseases such as Lyme borreliosis, bartonellosis and ehrlichiosis.