Emerging or re-emerging bacterial zoonoses: factors of emergence, surveillance and control.

Surveillance and control of emerging bacterial zoonoses is essential in order to prevent both human and animal deaths and to avoid potential economic disorders created by trade barriers or a ban on free circulation of human or animal populations. An increased risk of exposition to zoonotic agents, the breakdown of the host's defenses, the emergence of bacterial strains resistant to antibiotics and their widespread distribution as well as conjunctural causes associated with the action or inaction of man have been identified as the main factors leading to the emergence or re-emergence of bacterial zoonoses. After an in-depth review of these various factors, the present manuscript reviews the main components of detection and surveillance of emerging or re-emerging bacterial zoonoses. A description of the systems of control and the main obstacles to their success is also presented. Detection and surveillance of emerging zoonoses have greatly benefited from technical progress in diagnostics. The success of detection and control of emerging bacterial zoonoses is largely based on international solidarity and cooperation between countries.