Risk analysis is becoming increasingly important in veterinary medicine and veterinary public health. It isused to inform and objectify decisions concerning the control and management of risks for animals and/or humans.These risks are often arising from complex biological systems and pathways and therefore the use of apreset methodology to describe the underlying biological systems is becoming indispensable. In a first step ofrisk analysis the hazard is identified and a well defined risk question is developed. Secondly the entire productionprocess is described and an estimation of the risk and consequences of an unwanted event is made. Based on thisinformation risk control strategies are proposed by risk managers. Finally communication concerning the risk andthe preventive measurements is very important for all stakeholders involved.