NR AXIT
AU Barizzone,F.; Gelbmann,W.; Vivas-Alegre,L.; Goossens,B.
TI The EFSA Geographical BSE Risk Assessment Methodology
QU International Conference - Prion 2007 (26.-28.9.2007) Edinburgh International Conference Centre, Edinburgh, Scotland, UK - Book of Abstracts: Epidemiology, Risk Assessment and Transmission P04.25
IA http://www.prion2007.com/pdf/Prion Book of Abstracts.pdf
PT Konferenz-Poster
AB
Background: The Geographical BSE-Risk assessment (GBR) is an indicator of the BSE risk in a given country/region. The Scientific Steering Committee (SSC) of the European Commission (EC) developed a GBR methodology (SSC GBR) in 1998. As a result of its application, firstly by the SSC and from 2003 by the European Food Safety Authority (EFSA), all EU Member states and a number of non-EU states have been classified within four categories. The experience obtained by EFSA while carrying out the most recent assessments, highlighted the need for a review of the SSC GBR. As a result, an updated model - EFSA GBR - has been developed.
Aim: To present the EFSA GBR focusing on the assumptions and inputs of the model and on the differences with the SSC GBR.
Methodology: The model is based on two assumptions: (1) BSE arose in the United Kingdom (UK) from an unknown initial source; (2) it was exclusively propagated through the recycling of contaminated bovine tissues into animal feed. Thus, for all countries other than UK, imports of Meat and Bone Meal (MBM) or live cattle are the only possible initial sources of BSE to be taken into account for this methodology. The main two components of the EFSA GBR are: (i) External Challenge, which is the likelihood and the amount of the BSE agent entering into a geographical area in a given time period through infected cattle and/or MBM; (ii) Stability, which is the ability of a BSE/cattle system to prevent the introduction and to reduce amplification and spread of the BSE agent within its borders. The interaction between stability and challenge determines how the GBR develops over time. A specifically designed Excel worksheet has been created by EFSA to simulate the interaction.
Discussion: The methodology provides a framework to assess the likelihood of BSE being present in a specific country/region over a given time period. If the presence of BSE is likely, the EFSA GBR identifies the risks linked to the imports over time. It allows assessing periods of increasing and decreasing BSE risk and predicting the trend of the infection. The methodology does not depend on BSE surveillance data, as availability is variable or lacking in some non-EU Countries. The EFSA GBR is not an alternative to the procedure for the determination of the OIE BSE risk status, as it does not categorise a country/region. However, it provides a methodological framework that could be used for the risk assessment prescribed within the OIE procedure.
AD F. Barizzone, L. Vivas-Alegre, B. Goossens, European Food Safety Authority, Italy; W. Gelbmann, European Food Safety Authority, Italy
SP englisch
PO Schottland
EA pdf-Datei und Poster (Postertitel: Assessing the geographical risk of BSE) und Handout