This phenomenon has appeared in my fish pond recently. Fish will be red all over, with different places, such as head, tail and stomach. Until death. The purpose of taking measures

The occurrence of fulminant hemorrhagic disease in cultured crucian carp is increasing gradually. The prevention and treatment methods of fulminant hemorrhage of crucian carp were briefly introduced. Symptoms: In the early stage of crucian carp's illness, the fish's body, eyes, cheeks and fins are slightly congested. When the condition is serious, the body surface and fins are heavily congested, and there is congestion around the orbit. Some fish have prominent eyeballs and pale yellow ascites or red turbid ascites in their abdomen. The intestinal wall is congested, and there is no food and mucus in the intestine. Gill silk congestion or severe anemia. Etiology: there is a lot of silt at the bottom of the pond, a lot of toxic substances are deposited, there is lack of oxygen in the water, and the water environment is deteriorating. Abnormal weather, long-term non-rain, over-fat pond water and no fresh water to replace it have created conditions for the reproduction of bacteria and viruses, thus infecting fish. Did not do a good job of disinfection of fish, bringing pathogens into. Epidemic situation: According to the investigation, allogynogenetic crucian carp is susceptible to infection, and other crucian carp are also infected. The disease is fierce, with high morbidity and mortality, and sometimes a pool of crucian carp can die. The onset season is mostly from May to August. Precautionary measures: When fish enter tang qian, soak them in 3%-4% salt water 10 minute, or soak them in 20 mg/L potassium permanganate solution 15-20 minute. Regular water injection, regular disinfection and regular spraying of water quality improvers. The high-yield pool is equipped with an aerator. Treatment method: the whole pool is sprayed with strong chlorine essence with a concentration of 0.3 mg/L, that is, the water depth per mu per meter is 200 g for 2 days. On the third day, 3 tablets of compound sulfamethoxazole were added to each kilogram of concentrated feed to make medicinal bait for 3 days. Povidone iodine was sprayed in the whole pond with the concentration of 1-2 mg/L. While the pond water was disinfected, 2 grams of Scutellaria baicalensis Georgi, 5 grams of rhubarb and 3 grams of phellodendron amurense were fed to each kilogram of fish once a day1time for 4-6 days. Use 2-3 tablets of vitamin per kilogram of feed, pulverize and dissolve in water, mix with feed, and feed for 3 days. The crucian carp culture pond with water depth of 1 m uses 2 kg of tobacco leaves per mu, 7 ml of triamcinolone acetonide, 333 g of copper sulfate and 5 ml of Radix Isatidis. Usage: First put the tobacco leaves in an iron pot and boil them. After 2 hours, sprinkle them all over the pool. Then kill the enemy and pour it into a wooden basin, dilute it with water and spill it all over the pool. The next morning, pour Banlangen into a wooden basin, dilute it with water and sprinkle it all over the pond, then dilute it with copper sulfate and sprinkle it all over the pond. After 3-4 days, the sick fish can recover.

This is a viral disease. Aquatic reovirus belongs to reovirus family and belongs to aquatic animal reovirus genus.

1. incubation period: 3~ 1 day. During this period, the appearance of the fish did not show any symptoms, and the activity and feeding were normal. The length of incubation period is closely related to water temperature and virus concentration, with high water temperature, high virus concentration and short incubation period; Conversely, the incubation period is long. 2. prophase: the time is short, only 1~2 days. The fish turned black, swam alone and stopped eating.

3. Development period: the duration is different, usually 1~2 days, and the sick fish have symptoms of congestion and bleeding.

There is no way to remove pathogens. In a week or so, the death rate of fish will decrease after reaching the peak. How much you can survive depends on luck. Mainly look at the pond, pay attention to the water when breeding.