Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New test may help address costly parasite in sheep industry

11.01.2010
Researchers at Oregon State University and the University of Georgia have developed an improved, more efficient method to test for the most serious of the parasitic worms in sheep, a problem that causes hundreds of millions of dollars in losses every year to the global sheep and wool industry.

This technology is now available, and will allow a faster, easier and less expensive way to test for the presence and quantity of Haemonchus contortus, or “barber pole” worms, a species that is very pathogenic to sheep, goats and llamas. This will help sheep ranchers deal with this problem more quickly and effectively, optimize their management practices, and sometimes avoid costly therapies.

Findings about the new test were just published in Veterinary Parasitology, a professional journal.

“This particular parasite is much more pathogenic in sheep than other worms, and previous methods to detect it were very labor intensive and often not commercially practical,” said Michael Kent, an OSU professor of microbiology. “Now ranchers and veterinarians can test for this problem and target their management or treatment strategies much more effectively.”

This parasite causes significant production losses, and in some cases it’s the limiting factor to sheep production on pasture lands. The nematodes can cause internal bleeding, which in turn can lead to anemia, poor food conversion and growth, low protein levels, reduced lamb production and wool yield, and in some cases death.

Known as the barber pole or wire worm, Haemonchus contortus is a blood-sucking parasite that pierces the lining of the sheep’s stomach. It’s a prolific egg producer, releasing up to 10,000 eggs per day, and often causes problems in warmer climates or during the summer. Once an infection is demonstrated, expensive treatments or complex management strategies are often needed to address it.

The new lectin staining test is based on a peanut agglutinin that binds to eggs of the parasite and can be easily visualized with a microscope using ultraviolet light. It’s an improved version of previous technology developed by scientists in Australia that was slower, less effective, more expensive and required more advanced training to perform, researchers say.

The relatively inexpensive test was developed by microbiologists and veterinary doctors at OSU and UGA, and is now available through those institutions. Its use should continue to expand and become more readily available around the world, Kent said.

The test may also be of special value to ranchers interested in organic production of sheep, goats and llamas, who try to avoid use of chemical treatments in maintaining the health of their animals.

“One of the current testing tools commonly used by sheep and goat farmers in dealing with H. contortus is the FAMACHA© method, in which the farmer compares the animal’s lower eyelid color to swatches on a card to determine the animal’s anemia status,” said Bob Storey, a UGA researcher who co-developed the lectin staining test. “This method only works in situations where H. contortus is the primary parasite in a given herd’s worm population. The new lectin staining test allows for a faster and less expensive method of determining the predominance of H. contortus in a herd worm population, thereby making it easier for producers to determine if FAMACHA© can be a useful tool for them. Additionally, for the veterinarian dealing with an anemic animal and a heavy parasite burden, the lectin staining test provides quick feedback as to whether the anemia is parasite-based or may be due to another cause.”

The test requires only a small amount of feces, and results are available in as little as two days. Anyone interested in obtaining the test can get information on sampling, test results and fees from the Veterinary Diagnostic Laboratory at OSU (http://oregonstate.edu/vetmed/diagnostic or 541/752-5501), or Bob Storey (Dept. of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, Ga., 30602 or 706/542-0195). FAMACHA© information can be obtained through Bob Storey or by sending an email to famacha@uga.edu.

As with any animal health concerns, results should be reviewed with a veterinarian so that proper treatment programs can be put in place, researchers said.

About Oregon State University: OSU is one of only two U.S. universities designated a land-, sea-, space- and sun-grant institution. OSU is also Oregon’s only university designated in the Carnegie Foundation’s top tier for research institutions, garnering more than 60 percent of the total federal and private research funding in the Oregon University System. Its more than 20,300 students come from all 50 states and more than 80 countries. OSU programs touch every county within Oregon, and its faculty teach and conduct research on issues of national and global importance.

About the UGA College of Veterinary Medicine: The University of Georgia College of Veterinary Medicine, founded in 1946, is dedicated to training future veterinarians, to conducting research related to animal diseases, and to providing veterinary services for animals and their owners. Research efforts are aimed at enhancing the quality of life for animals and people, improving the productivity of poultry and livestock, and preserving a healthy interface between wildlife and people in the environment they share. The current Teaching Hospital, built in 1979, serves more than 18,000 patients per year in one of the smallest teaching hospitals in the United States. The college is currently working to raise $15 million toward building a new Veterinary Medical Learning Center, which will include a new teaching hospital as well as classrooms and laboratories that will allow for the education of more veterinarians. More veterinarians are needed to promote food safety and protect public health and to provide veterinary services for farm and companion animals owned by a rapidly growing regional population. The college enrolls 102 students each fall out of more than 550 who apply. The goal is to increase enrollment to 150 when the Veterinary Medical Learning Center is built.

Sam Fahmy | EurekAlert!
Further information:
http://www.vet.uga.edu/PR/photos.php
http://www.vet.uga.edu

More articles from Agricultural and Forestry Science:

nachricht Energy crop production on conservation lands may not boost greenhouse gases
13.03.2017 | Penn State

nachricht How nature creates forest diversity
07.03.2017 | International Institute for Applied Systems Analysis (IIASA)

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: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>