. occur
The fish showed persistent chronic spores, and then spores flowed into the septum, resulting in blockage of the capillaries, congestion, detachment of the septum epithelium, and hemorrhagic anemia.
. Etiology
This etiology is caused by parasitism of the genus Myxosporidium.
The length of the spores of Sphaerotheca alternata is about 10-12 mm. The end of the spores protrudes from the end of two spores that are characteristic of the genus Sporozoa, and the average length of the caudal projections is 38 mm (31-50 mm).
Sporozoites of the genus Ilexia develop in the heart arteries and form spores. Afterwards, spores infiltrate into the hernia valve, resulting in blockage of the capillaries, congestion, and detachment of the epithelium of the hernia valve, leading to hemorrhagic anemia.
. symptom
The appetite of suffering fish weakened, swimming slowed down, and then died. The internal symptoms are mainly phlegm, anemia, hypersecretion of mucus, inflammation of the heart and hypertrophy, and anemia of the internal organs. The sacral vascular capillaries are filled with a large amount of myxospores, resulting in blockage of blood vessels.
. Countermeasures
There is no effective anthelmintic agent for calyx of calyx heart disease. As a countermeasure, in the peak period of disease, the amount of feed should be controlled, and a good feeding environment should be maintained to prevent hypoxia.
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