Featured Research

from universities, journals, and other organizations

Vaccines could help what's ailing fish

Date:
October 26, 2010
Source:
USDA/Agricultural Research Service
Summary:
U.S. Department of Agriculture scientists are developing vaccines to help protect healthy farm-raised catfish against key diseases.

Immersion vaccines have been used for decades, but current work on developing alternative methods of vaccine delivery through feeding is promising. Here, molecular biologist Craig Shoemaker (left) and microbiologist Phillip Klesius demonstrate a technique where channel catfish are immersed in water containing the modified live Streptococcusiniae vaccine.
Credit: Photo by Julia Pridgeon

U.S. Department of Agriculture (USDA) scientists are developing vaccines to help protect healthy farm-raised catfish against key diseases.

Related Articles


Working as a team, microbiologist Phillip H. Klesius and molecular biologists Julia Pridgeon and Craig Shoemaker with USDA's Agricultural Research Service (ARS) at the agency's Aquatic Animal Health Research Unit in Auburn, Ala., and Joyce J. Evans, aquatic pathologist at the Auburn unit's lab in Chestertown, Md., are developing vaccines against Streptococcus iniae, S. agalactiae and other pathogens.

ARS is USDA's principal intramural scientific research agency. This research supports the USDA priority of promoting international food security.

The scientists modify the genetic makeup of pathogens to make them nonvirulent, and then develop vaccines that expose fish to low doses of the modified forms of the pathogens.

Klesius and Pridgeon have developed a modified live S. iniae vaccine that appears to be superior to inactivated or killed vaccines. The live modified vaccine has enough similarity with the pathogen to create a lifelong immunity in fish, according to Klesius.

Scientists are looking at new methods to vaccinate fish. But for now, the vaccination process consists of immersing the fish in water that contains the modified pathogen.

Previous research breakthroughs have benefited the catfish industry. For example, a ARS-developed vaccine against the pathogen Edwardsiella ictaluri, which causes enteric septicemia, has been widely adopted by fish growers.

In an earlier trial, the vaccine against enteric septicemia of catfish was tested by Mississippi State University researchers. Results showed a 12 percent increase in the survival rate of fish that were given the vaccine, and a substantial increase in returns for producers who used the vaccine in their ponds.

Read more about this and other research on aquaculture in the October 2010 issue of Agricultural Research magazine at: http://www.ars.usda.gov/is/AR/archive/oct10/fish1010.htm


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Sandra Avant. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Vaccines could help what's ailing fish." ScienceDaily. ScienceDaily, 26 October 2010. <www.sciencedaily.com/releases/2010/10/101022123753.htm>.
USDA/Agricultural Research Service. (2010, October 26). Vaccines could help what's ailing fish. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2010/10/101022123753.htm
USDA/Agricultural Research Service. "Vaccines could help what's ailing fish." ScienceDaily. www.sciencedaily.com/releases/2010/10/101022123753.htm (accessed October 31, 2014).

Share This



More Plants & Animals News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How A Chorus Led Scientists To A New Frog Species

How A Chorus Led Scientists To A New Frog Species

Newsy (Oct. 30, 2014) — A frog noticed by a conservationist on New York's Staten Island has been confirmed as a new species after extensive study and genetic testing. Video provided by Newsy
Powered by NewsLook.com
Surfer Accidentally Stands on Shark, Gets Bitten

Surfer Accidentally Stands on Shark, Gets Bitten

AP (Oct. 30, 2014) — A 20-year-old competition surfer said on Thursday he accidentally stepped on a shark's head before it bit him off the Australian east coast. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Ebola Inflicts Heavy Toll on Guinean Potato Trade

Ebola Inflicts Heavy Toll on Guinean Potato Trade

AFP (Oct. 30, 2014) — The Ebola epidemic has seen Senegal and Guinea Bissau close its borders with Guinea and the economic consequences have started to be felt, especially in Fouta Djallon, where the renowned potato industry has been hit hard. Duration: 02:01 Video provided by AFP
Powered by NewsLook.com
Genetically Altered Glowing Flower on Display in Tokyo

Genetically Altered Glowing Flower on Display in Tokyo

Reuters - Innovations Video Online (Oct. 30, 2014) — Just in time for Halloween, a glowing flower goes on display in Tokyo. Instead of sorcery and magic, its creators used science to genetically modify the flower, adding a naturally fluorescent plankton protein to its genetic mix. Ben Gruber reports. Video provided by Reuters
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:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

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