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Where is whirling disease from?

Published in Fish Diseases 2 mins read

Whirling disease likely originated in Europe.

Origins of Whirling Disease

Whirling disease, a devastating ailment affecting fish, particularly trout and salmon, has its roots in the Old World. Specifically, it is believed to have originated in Europe. This conclusion is based on research indicating that native brown trout in Europe have developed resistance to the disease, implying a longer history of exposure.

Key Points About Whirling Disease Origin:

  • European Origin: The prevailing scientific understanding is that whirling disease began in Europe.
  • Brown Trout Resistance: The fact that European brown trout exhibit resistance to whirling disease strongly suggests a long-term exposure within the region.
  • Introduction Elsewhere: This disease has since been introduced to other parts of the world, notably North America, where it has had significant ecological and economic impacts.

Impact of Whirling Disease

The global spread of whirling disease highlights the potential for diseases to be transported across geographical boundaries, especially through human activities, including the movement of fish stocks. The disease primarily affects young fish, causing skeletal deformities, making it harder for them to feed and escape predators, often resulting in death.

Why the Focus on European Origin?

The key to identifying the origin of whirling disease is the presence of resistance in European brown trout. Resistance takes time to develop, suggesting that the pathogen has been around much longer in Europe.

Here's a summary of where whirling disease originated:

Characteristic Details
Origin Europe
Primary Host Native European Brown Trout
Resistance Native European Brown Trout display resistance
Spread Introduced to other parts of the world