Featured Research

from universities, journals, and other organizations

The prevalence of colds and pneumonia in cows can be controlled

Date:
November 5, 2013
Source:
Norwegian School of Veterinary Science
Summary:
Respiratory diseases in cattle are a great threat to animal welfare and lead to financial losses in the cattle industry. The bovine respiratory syncytial virus (BRSV) is one of the main causes of respiratory disease in cattle. A study of the prevalence and infection distribution of the virus shows that it is possible to control the virus, even though it occurs very frequently.

Respiratory diseases in cattle are a great threat to animal welfare and lead to financial losses in the cattle industry. The bovine respiratory syncytial virus (BRSV) is one of the main causes of respiratory disease in cattle. A study of the prevalence and infection distribution of the virus shows that it is possible to control the virus, even though it occurs very frequently.

The BRS virus is equivalent to the human RS virus and causes most of the cases of serious pneumonia that lead to fatalities in calves and to epidemics which can spread to a large number of farms in the same area. The study focused on the prevalence and infection distribution of the virus between Norwegian cattle herds and found that during the course of one year, nearly half of the cattle herds were newly infected, while almost as many herds became free of infection. It therefore appears that the virus does not survive for a long time in one herd and that it should be possible to reduce the number of infections by preventing the herds becoming re-infected.

The infection dynamics of the BRSV virus was studied in 134 randomly selected Norwegian dairy herds. Five calves in the herds were tested for antibodies against this virus and then again six months later. A herd was defined as positive if at least one animal aged between 150-365 days was shown to have antibodies against the virus. The young age of the animals tested would indicate that they probably were infected quite recently, i.e. during the course of the last year.

During the study period, a large proportion -- 54% -- of the herds was shown to be BRSV-positive. The prevalence of the virus varied a great deal in different parts of the country. Several herds with negative test results were located in close proximity to herds infected by the virus and some of the former remained free of the virus, in spite of the presence of several newly infected herds in the neighbouring area. This indicates that it is possible to prevent a herd becoming infected, even in areas with a high prevalence of the virus.

42% of the herds that showed negative results on the first test, showed positive results during the following six months. The frequency of new infections was the same, irrespective of the season. 33% of the herds which had originally tested positive managed to get rid of the infection after six months.

The findings of this study indicate that monitoring the prevalence of the virus in order to identify negative herds and focusing on measures to combat infection in these herds ought to be effective strategies for limiting the prevalence and the consequences of BRSV infection in cattle. Knowledge about the most effective methods of preventing herds from becoming infected is still lacking. The research group "Viral infections in cattle" at the Norwegian School of Veterinary Science, which carried out this study, is currently engaged in projects that seek to identify the most effective ways of preventing new infections in herds.


Story Source:

The above story is based on materials provided by Norwegian School of Veterinary Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. T. B. Klem, S. M. Gulliksen, K.- I. Lie, T. Loken, O. Osteras, M. Stokstad. Bovine respiratory syncytial virus: infection dynamics within and between herds. Veterinary Record, 2013; DOI: 10.1136/vr.101936

Cite This Page:

Norwegian School of Veterinary Science. "The prevalence of colds and pneumonia in cows can be controlled." ScienceDaily. ScienceDaily, 5 November 2013. <www.sciencedaily.com/releases/2013/11/131105081404.htm>.
Norwegian School of Veterinary Science. (2013, November 5). The prevalence of colds and pneumonia in cows can be controlled. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2013/11/131105081404.htm
Norwegian School of Veterinary Science. "The prevalence of colds and pneumonia in cows can be controlled." ScienceDaily. www.sciencedaily.com/releases/2013/11/131105081404.htm (accessed September 19, 2014).

Share This



More Health & Medicine News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Cost of Ebola

The Cost of Ebola

Reuters - Business Video Online (Sep. 18, 2014) As Sierra Leone prepares for a three-day "lockdown" in its latest bid to stem the spread of Ebola, Ciara Lee looks at the financial implications of fighting the largest ever outbreak of the disease. Video provided by Reuters
Powered by NewsLook.com
What HealthKit Bug Means For Your iOS Fitness Apps

What HealthKit Bug Means For Your iOS Fitness Apps

Newsy (Sep. 18, 2014) Apple has delayed the launch of the HealthKit app platform, citing a bug. Video provided by Newsy
Powered by NewsLook.com
U.S. Food Makers Surpass Calorie-Cutting Pledge

U.S. Food Makers Surpass Calorie-Cutting Pledge

Newsy (Sep. 18, 2014) Sixteen large food and beverage companies in the United States that committed to cut calories in their products far surpassed their target. Video provided by Newsy
Powered by NewsLook.com
Residents Vaccinated as Haiti Fights Cholera Epidemic

Residents Vaccinated as Haiti Fights Cholera Epidemic

AFP (Sep. 18, 2014) Haitians receive the second dose of the vaccine against cholera as part of the UN's vaccination campaign. Duration: 00:34 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins