Featured Research

from universities, journals, and other organizations

3-D scans map widespread fish disease

Date:
March 5, 2014
Source:
University of Copenhagen
Summary:
Seventy-five percent of antibiotics in Danish fish farms is used to treat fish with enteric redmouth disease. With the help of 3-D scans, researchers have mapped how the fish are infected with the bacterium. The disease, which reduces fish well being and increases fish mortality in Danish fish farms, is harmless to humans.

Enteric redmouth disease is a bacterial infection that can kill fish, but is entirely harmless to humans. Symptoms typically take the form of a redness or bleeding in and around the mouth of the fish.
Credit: Image courtesy of University of Copenhagen

Fascinating 3D images of rainbow trout give researchers a crystal clear picture of how the bacterium causing enteric redmouth disease infects fish.

"The new scans show us that the fish are infected through their ultra-thin gills," explains postdoc Maki Otani, the Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences.

Educated in Japan, Maki Otani has supervised the scanning process, where advanced technology and precision combine to form a higher synthesis. For this reason, the research group can now map with extreme precision the bacterial infection (Yersinia ruckeri) causing enteric redmouth disease in fish.

The disease, which reduces fish well being and increases fish mortality in Danish fish farms, is harmless to humans.

The infection pathway

The researchers have scanned the ultra-thin gills of rainbow trout. The gills are a specialized organ whose chief function is to absorb oxygen from the water so the fish can breathe. Only two cell layers separate the outer water from the blood in the fish's small arteries. The new findings show that the bacterium infects the fish via a specific cell type in the gills.

The red spots mark the infected cells.

As little as 60 seconds after the bacterium is introduced into the aquaculture, its presence can be registered in the fish's bloodstream. The bacterium subsequently infects the fish via its intestine and the lateral line canal- a sensory apparatus running along both sides of the body.

Rare 3D scanner

The University of Copenhagen possesses a so-called OPT scanner (Optical Projection Tomography) -- a rare piece of equipment enabling researchers to monitor the infection with unparalleled precision.

"The research findings are presumably the first of their kind and the scanning images exceed our wildest dreams," explains associate professor Martin Raida, the Department of Veterinary Disease Biology, who is heading the project.

Among other things, he is conducting research in developing vaccines. The Danish fish production industry currently vaccinates its fish, also against enteric redmouth disease, but to date this has not solved the problem. Martin Raida hopes that the new knowledge can contribute to the development of a more effective vaccine against enteric redmouth disease. This will contribute to bring down the amount of antibiotics used and thus reduce the burden on the environment.


Story Source:

The above story is based on materials provided by University of Copenhagen. Note: Materials may be edited for content and length.


Journal Reference:

  1. Maki Ohtani, Kasper Rψmer Villumsen, Helene Kragelund Strψm, Martin Kristian Raida. 3D Visualization of the Initial Yersinia ruckeri Infection Route in Rainbow Trout (Oncorhynchus mykiss) by Optical Projection Tomography. PLoS ONE, 2014; 9 (2): e89672 DOI: 10.1371/journal.pone.0089672

Cite This Page:

University of Copenhagen. "3-D scans map widespread fish disease." ScienceDaily. ScienceDaily, 5 March 2014. <www.sciencedaily.com/releases/2014/03/140305084848.htm>.
University of Copenhagen. (2014, March 5). 3-D scans map widespread fish disease. ScienceDaily. Retrieved August 1, 2014 from www.sciencedaily.com/releases/2014/03/140305084848.htm
University of Copenhagen. "3-D scans map widespread fish disease." ScienceDaily. www.sciencedaily.com/releases/2014/03/140305084848.htm (accessed August 1, 2014).

Share This




More Plants & Animals News

Friday, August 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Vaccine Might Be Coming, But Where's It Been?

Ebola Vaccine Might Be Coming, But Where's It Been?

Newsy (Aug. 1, 2014) — Health officials are working to fast-track a vaccine — the West-African Ebola outbreak has killed more than 700. But why didn't we already have one? Video provided by Newsy
Powered by NewsLook.com
Study Links Certain Birth Control Pills To Breast Cancer

Study Links Certain Birth Control Pills To Breast Cancer

Newsy (Aug. 1, 2014) — Previous studies have made the link between birth control and breast cancer, but the latest makes the link to high-estrogen oral contraceptives. Video provided by Newsy
Powered by NewsLook.com
Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) — Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) — With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
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