Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Altered management routines for scrapie

10.12.2007
A new doctorate has contributed to changing the way we manage scrapie in the EU and Norway. Two forms of the disease scrapie exist, classical scrapie and scrapie Nor98, and Petter Hopp has revealed important differences between them that will have great significance for their management by governmental authorities and the sheep industry. In contrast to classical scrapie, scrapie Nor98 is little contagious and the traditional drastic measures of slaughter are therefore not necessary.

“The most important factors that increase the risk of transmission of classical scrapie between sheep flocks are commercial trading of live animals and physical contact between sheep flocks on pasture or in breeding activities. Classical scrapie is therefore best controlled using measures that limit the degree of physical contact between sheep flocks.” says Petter Hopp.

The thesis shows, however, that scrapie Nor98 differs from classical scrapie. Hopp found no indication of contagion between flocks as a result of movement of animals. This strengthens the belief that these are two different diseases that need to be controlled using different measures. We also need to consider the possibility that scrapie Nor98 may appear spontaneously in sheep in the absence of a source of infection.

This and other research projects on scrapie at the National Veterinary Institute have contributed to an introduction by EU authorities of an altered and milder set of managerial measures against scrapie Nor98. These measures came into effect in the EU on July 1 this year, and are binding for Norway from the same date.

The farmer a central figure in combating scrapie

Hopp has also considered different strategies for the surveillance of scrapie in Norway. Experience in Norway has shown that most outbreaks of classical scrapie are discovered through the farmer himself reporting sick animals to the veterinary authorities.

The thesis also shows that Norwegian sheep farmers are generally interested in contributing to the fight against the disease, even though control measures may lead to flocks of sheep with classical scrapie being slaughtered.

“It is important to maintain and strengthen the sheep farmers’ vigilance against scrapie. We therefore need to learn more about the factors that influence farmers’ attitudes and motivation to report”, says Hopp.

Scrapie is a transmissible, chronic, neurological disease of small ruminants. The first scrapie case in a Norwegian-bred sheep flock occurred in 1981. During the 1990’s, the incidence of the disease in Norwegian flocks increased steadily, culminating with scrapie being diagnosed in 31 flocks in 1996. This led 1997 to the introduction of the Norwegian surveillance and control program for scrapie.

On December 5, 2007, Cand.Med.Vet. Petter Hopp defended his thesis for the degree of Doctor philosophiae at the Norwegian School of Veterinary Science, entitled “Epidemiological studies of scrapie in the Norwegian sheep populations.” The work was carried out at the National Veterinary Institute.

Magnhild Jenssen | alfa
Further information:
http://www.veths.no/105/English/7899/Altered-management-routines-for-scrapie/

More articles from Agricultural and Forestry Science:

nachricht Plant Hormone Makes Space Farming a Possibility
17.10.2018 | Universität Zürich

nachricht Goldilocks principle in biology -- fine-tuning the 'just right' signal load
15.10.2018 | Aarhus University

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: memory-steel - a new material for the strengthening of buildings

A new building material developed at Empa is about to be launched on the market: "memory-steel" can not only be used to reinforce new, but also existing concrete structures. When the material is heated (one-time), prestressing occurs automatically. The Empa spin-off re-fer AG is now presenting the material with shape memory in a series of lectures.

So far, the steel reinforcements in concrete structures are mostly prestressed hydraulically. This re-quires ducts for guiding the tension cables, anchors for...

Im Focus: Goodbye, silicon? On the way to new electronic materials with metal-organic networks

Scientists at the Max Planck Institute for Polymer Research (MPI-P) in Mainz (Germany) together with scientists from Dresden, Leipzig, Sofia (Bulgaria) and Madrid (Spain) have now developed and characterized a novel, metal-organic material which displays electrical properties mimicking those of highly crystalline silicon. The material which can easily be fabricated at room temperature could serve as a replacement for expensive conventional inorganic materials used in optoelectronics.

Silicon, a so called semiconductor, is currently widely employed for the development of components such as solar cells, LEDs or computer chips. High purity...

Im Focus: Storage & Transport of highly volatile Gases made safer & cheaper by the use of “Kinetic Trapping"

Augsburg chemists present a new technology for compressing, storing and transporting highly volatile gases in porous frameworks/New prospects for gas-powered vehicles

Storage of highly volatile gases has always been a major technological challenge, not least for use in the automotive sector, for, for example, methane or...

Im Focus: Disrupting crystalline order to restore superfluidity

When we put water in a freezer, water molecules crystallize and form ice. This change from one phase of matter to another is called a phase transition. While this transition, and countless others that occur in nature, typically takes place at the same fixed conditions, such as the freezing point, one can ask how it can be influenced in a controlled way.

We are all familiar with such control of the freezing transition, as it is an essential ingredient in the art of making a sorbet or a slushy. To make a cold...

Im Focus: Micro energy harvesters for the Internet of Things

Fraunhofer IWS Dresden scientists print electronic layers with polymer ink

Thin organic layers provide machines and equipment with new functions. They enable, for example, tiny energy recuperators. In future, these will be installed...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

Conference to pave the way for new therapies

17.10.2018 | Event News

Berlin5GWeek: Private industrial networks and temporary 5G connectivity islands

16.10.2018 | Event News

 
Latest News

Weighing planets and asteroids

23.10.2018 | Physics and Astronomy

Fiber-based quantum communication - Interference of photons using remote sources

23.10.2018 | Information Technology

'Mushrooms' and 'brushes' help cancer-fighting nanoparticles survive in the body

23.10.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>