Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


3D scans map widespread fish disease


Seventy-five per cent of antibiotics in Danish fish farms is used to treat fish with enteric redmouth disease. With the help of 3D scans, researchers at the University of Copenhagen have mapped how the fish are infected with the bacterium. The findings were recently published in the scientific publication PLOS ONE.

“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.

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.

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 specialised 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.

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.


Maki Otani, mobile: + 45 42 46 88 82
Martin Raida, mobile: + 45 60 66 67 01

| EurekAlert!

Further reports about: Biology bacterial infection blood fish disease function pathway synthesis vaccines

More articles from Agricultural and Forestry Science:

nachricht Covering the bases with cover crops
01.10.2015 | American Society of Agronomy

nachricht Innovative seeding machine to speed up kenaf planting
23.09.2015 | Universiti Putra Malaysia (UPM)

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: Reliable in-line inspections of high-strength automotive body parts within seconds

Nondestructive material testing (NDT) is a fast and effective way to analyze the quality of a product during the manufacturing process. Because defective materials can lead to malfunctioning finished products, NDT is an essential quality assurance measure, especially in the manufacture of safety-critical components such as automotive B-pillars. NDT examines the quality without damaging the component or modifying the surface of the material. At this year's Blechexpo trade fair in Stuttgart, Fraunhofer IZFP will have an exhibit that demonstrates the nondestructive testing of high-strength automotive body parts using 3MA. The measurement results are available in a matter of seconds.

To minimize vehicle weight and fuel consumption while providing the highest level of crash safety, automotive bodies are reinforced with elements made from...

Im Focus: Kick-off for a new era of precision astronomy

The MICADO camera, a first light instrument for the European Extremely Large Telescope (E-ELT), has entered a new phase in the project: by agreeing to a Memorandum of Understanding, the partners in Germany, France, the Netherlands, Austria, and Italy, have all confirmed their participation. Following this milestone, the project's transition into its preliminary design phase was approved at a kick-off meeting held in Vienna. Two weeks earlier, on September 18, the consortium and the European Southern Observatory (ESO), which is building the telescope, have signed the corresponding collaboration agreement.

As the first dedicated camera for the E-ELT, MICADO will equip the giant telescope with a capability for diffraction-limited imaging at near-infrared...

Im Focus: Locusts at the wheel: University of Graz investigates collision detector inspired by insect eyes

Self-driving cars will be on our streets in the foreseeable future. In Graz, research is currently dedicated to an innovative driver assistance system that takes over control if there is a danger of collision. It was nature that inspired Dr Manfred Hartbauer from the Institute of Zoology at the University of Graz: in dangerous traffic situations, migratory locusts react around ten times faster than humans. Working together with an interdisciplinary team, Hartbauer is investigating an affordable collision detector that is equipped with artificial locust eyes and can recognise potential crashes in time, during both day and night.

Inspired by insects

Im Focus: Physicists shrink particle accelerator

Prototype demonstrates feasibility of building terahertz accelerators

An interdisciplinary team of researchers has built the first prototype of a miniature particle accelerator that uses terahertz radiation instead of radio...

Im Focus: Simple detection of magnetic skyrmions

New physical effect: researchers discover a change of electrical resistance in magnetic whirls

At present, tiny magnetic whirls – so called skyrmions – are discussed as promising candidates for bits in future robust and compact data storage devices. At...

All Focus news of the innovation-report >>>



Event News

EHFG 2015: Securing healthcare and sustainably strengthening healthcare systems

01.10.2015 | Event News

Conference in Brussels: Tracking and Tracing the Smallest Marine Life Forms

30.09.2015 | Event News

World Alzheimer`s Day – Professor Willnow: Clearer Insights into the Development of the Disease

17.09.2015 | Event News

Latest News

Using optical fiber to generate a two-micron laser

09.10.2015 | Process Engineering

Sea turtles face plastic pollution peril

09.10.2015 | Ecology, The Environment and Conservation

Antioxidants cause malignant melanoma to metastasize faster

09.10.2015 | Health and Medicine

More VideoLinks >>>