HOME >> BIOLOGY >> NEWS
Cow's resistance to worms is genetically determined

Research carried out in the Netherlands has revealed that the genetic background of cattle apparently determines how quickly and effectively they acquire immunity to infections from gastrointestinal worms. Such infections cause considerable economic losses in the beef farming industry. During her doctoral research, Kirezi Kanobana investigated how cattle rid themselves of worms and prevent new infections.

Kanobana used an infection model in which, based on their genetic background, animals exhibited varying degrees of resistance to gastrointestinal worms. Broadly speaking there are three groups of animals. Two percent of the animals are naturally immune to a first infection. Another group reacts to the first infection with an effective immune response. In the event of a second infection these animals are protected. A third group is highly sensitive for infection and scarcely acquires any immunity even after repeated infections.

The researcher distinguished the three groups of animals by using two types of measurement. Three-month-old calves were infected with 100,000 larvae of a small-intestinal worm. After the infection an initial distinction was made on the basis of parasitological variables such as worm counts and the detection of eggs in the animals' excreta. Secondly, immunological parameters were used to confirm the three groups of animals.

In an animal that has no resistance to a worm infection, the worms occur in the first part of the small intestine. In animals that develop resistance, worms are translocated towards the end of the small intestine.

Interestingly the male worms disappear out of the intestine first, followed by the female worms. This conclusion is based on a study six different parts of the small intestine, which in calves has a length of between 25 to 40 metres. In addition to this, Kanobana also discovered a number of mechanisms that are responsible for ensuring the disappearance of the worms from the small i
'"/>

Contact: Sonja Jacobs
news@nwo.nl
31-704-330-713
Netherlands Organization for Scientific Research
10-Oct-2003


Page: 1 2

Related biology news :

1. Master of antimalarial resistance
2. Anthrax enzyme images reveal secrets of antibiotic resistance, suggest new drug design
3. Evolvability could be a driving force in drug resistance
4. Insecticide resistance: A constraint on evolutionary change
5. New drug shows promise against Gleevec resistance in mice
6. New milestones on the path to conquering HIV drug resistance (AIDS)
7. Study investigates breast cancer resistance to tamoxifen and possible way to reverse it
8. Antibiotic resistance risk from triclosan questioned
9. Cancer drug resistance research leads to possible therapeutic target for Alzheimers disease
10. Researchers string together players in pesticide resistance orchestra
11. Chicken litter harbors agents that generate antibiotic multi-resistance, according to UGA study

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/8/2019)... ... January 07, 2019 , ... ... solutions, is proud to welcome Thomas Kennedy as head of sales and business ... for PureWay. , Mr. Kennedy has previously worked for Johnson & Johnson Medical, ...
(Date:1/4/2019)... ... January 02, 2019 , ... Lifecycle Biotechnologies ... the life science tools and service supplier turned 40 in 2018 and for ... catalog features not just part numbers like most catalogs, but rather, insightful information ...
(Date:12/25/2018)... ... 2018 , ... Researchers at the Icahn School of Medicine ... a long-standing computational concept known as “blacklisting,” which is commonly employed as a ... as a filter to single out genetic variations in patient genomes and exomes ...
Breaking Biology News(10 mins):
(Date:1/8/2019)... ... January 08, 2019 , ... The American Society of ... were named by a selection committee made up of industry leaders identified by the ... Development grants are mentored awards created to support ASGCT members designing transformative pilot studies ...
(Date:1/4/2019)... (PRWEB) , ... January 01, 2019 , ... ... first Microbiome Conference at the World Economic Forum Annual Meeting January 22-25, 2019 ... conference is invitation-only. , The World Economic Forum Annual Meeting brings together leaders ...
(Date:12/20/2018)... ... ... New Year’s brings reflection and desire to improve for individuals and businesses ... on the horizon, Jim Kasic, president and CEO of Boulder iQ, suggests five resolutions ... Regulation (MDR), digital health, and big data are just a few of the challenges ...
(Date:12/18/2018)... ... December 17, 2018 , ... ABCT , ... biosciences ventures invited to participate in the annual program. Twelve ventures will participate ... and a professional network. All startups receive an entrepreneur coach, access to active ...
Breaking Biology Technology:
Cached News: