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 Trees and climate change: Faster growth, lighter wood
14.08.2018 | Technische Universität München

nachricht Animals and fungi enhance the performance of forests
01.08.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

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: It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.

The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Metamolds: Molding a mold

20.08.2018 | Information Technology

It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

20.08.2018 | Power and Electrical Engineering

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>