What should I do if a fish has iodine vesperiasis? Treatment of fish iodine vesperiasis

Fish iodine vesperiosis is a parasitic disease that is endemic in central, eastern and southern China. The disease mainly harms carp and mud carp, and once the outbreak of mortality can be as high as 80%. Especially in the summer flowering stage, if there is a great harm. Sick fish with iodine bubble worms become more and more emaciated, thus losing their commodity value. Once fish iodine vesicle disease is found, the affected fish should be treated in time, and the harmless treatment of non-therapeutic value should be carried out. In addition, in the process of fish farming, strengthening prevention can effectively reduce the occurrence of this disease.

　　First, understand the pathogen of carp iodine vesicle disease

　　It is a fish disease caused by the parasitism of wild carp iodine bubbles. The inner shell of the worm has two bottle-shaped polar sacs at the anterior end, with spiral-shaped polar filaments inside, and two embryonic nuclei and a pronounced iodophilic vesicle inside the cytoplasm. The spores are long and ovate, 11.4 (10.8 to 12.0) microns long and 8.5 (8.4 to 9.0) microns wide; The capsule is 4.6 (4.2 to 4.8) microns long and 2.8 (2.4 to 3.2) microns wide.

　　Second, familiar with the symptoms of fish iodine vesperiasis

　　Milky white cysts the size of corn appear on the surface of the fish's body and fins, and when you open the gill lid, you can see that there are also a large number of cysts on the gill filament. Some of the sacs are the size of sesame seeds, and some are as large as peas. Sick fish swim slowly, have poor feeding ability, and poor adaptability, and die once the floating head or water temperature drops suddenly.

　　The sick fish is thin and weak, and the body color is dull and dull, which reduces the ornamental value. Due to the parasitization of the cell sac, the blood circulation of the goldfish is disturbed, the gill filament is overburdened, and it is seriously enlarged or bent and deformed. Most of the diseased fish are juvenile fish, and some large fish and first-year fish will also get sick. The epidemic season is from late May to late August every year, and the disease is becoming more and more serious.

　　The gills of the fish are invaded by the wild carp iodobelis in large numbers, forming many gray-white nodular sacs, and on the gill arch of the carp species, a large number of wild carp iodophyllary sacs are parasitic, causing the fish to die.

　　Third, timely prevention and control of fish iodine vesicle disease

　　There is currently no cure for this disease. The disease is controllable when it is mild, but difficult to treat when it is serious, so it should be mainly prevention.

　　1. Treatment methods

　　1) Treatment can be selected with lark spores clear whole pool sprinkling, while taking lark spores or dikjuli premix, the disease can not use copper sulfate.

　　2) It is also possible to put 500 grams of potassium permanganate with 1 cubic meter of water, fully dissolved, and soaked the diseased fish for 20-30 minutes.

　　3) Clear the pond with the dry quicklime method to kill the spores in the silt layer at the bottom of the pond, ** It is good to use an iron rake to rake the bottom mud once the next day after application.

　　2. Preventive measures

　　1) Thoroughly clear the pond and disinfect it to inhibit the large number of its spores to a certain extent and reduce the occurrence of this disease. Disinfect the water body of the disease, including the disinfection of containers, for prevention.

　　2) It is forbidden to raise goldfish with fish pond water, lake water or reservoir water to prevent iodine bubble worm infection.

　　3) Strengthen feeding management, often feeding water fleas, sword water fleas and other animal baits, increase the disease resistance of fish bodies.

　　4) In the epidemic season, every 15 days with 0.3-0.5mg/kg 90% crystalline dimethodium whole pool.

　　5) Sick fish and dead fish are buried in the soil far from the fish pond, and some quicklime is sprinkled on the fish body when buried.