A disease of trout caused by a parasitic protozoan, affecting the balance of the fish and causing it to swim with a whirling motion.
（寄生原生动物引起的）鳟鱼眩晕病
The protozoan is Myxosoma cerebralis, phylum Sporozoa
Example sentencesExamples
In yet another controversy, the new EPA chief's family fish farm stands accused of introducing trout infected with the deadly whirling disease - which causes fish to swim in circles - into Utah rivers.
In some rivers whirling disease causes little harm to fish, but it can also suddenly erupt, causing a so-called ‘hot zone’ in which thousands of young fish die.
Definition of whirling disease in US English:
whirling disease
noun
A disease of juvenile trout and salmon caused by a parasitic protozoan, affecting the balance of the fish and causing it to swim with a whirling motion.
（寄生原生动物引起的）鳟鱼眩晕病
The protozoan is Myxobolus cerebralis, phylum Sporozoa
Example sentencesExamples
In yet another controversy, the new EPA chief's family fish farm stands accused of introducing trout infected with the deadly whirling disease - which causes fish to swim in circles - into Utah rivers.
In some rivers whirling disease causes little harm to fish, but it can also suddenly erupt, causing a so-called ‘hot zone’ in which thousands of young fish die.