Every summer, with the continuous rise of this temperature, the water temperature industry will continue to rise, which is suitable for the golden season of aquaculture, but also the high incidence of disease, viral, bacterial and parasitic diseases will be more prominent. The disease mainly occurs in the polygonal grass, green fish intensive ponds or carp grass and green polyculture ponds fed with compound feed, and the epidemic season occurs from May to October, usually accompanied by bacterial diseases, and is generally prevalent throughout the country. Hepatobiliary syndrome is a kind of summer frequent occurrence, today we will talk about how to prevent and treat hepatobiliary syndrome.
After entering May, the temperature has gradually risen, water bacteria, viruses, parasites, etc. with the increase of water temperature multiply, plus the amount of feed will lead to the emergence of hepatobiliary syndrome in farmed animals, mainly eating too fiercely, growing rapidly, liver and gallbladder load is too heavy Part of the fish green liver appears, so reasonable feeding health care products can improve the physique and immunity of fish more, reduce the incidence of disease, reduce the bait coefficient, promote growth, through internal administration of liver and intestine health for half a month liver pink, bile light green, the overall situation is very good, Food digested well.
Symptoms of hepatobiliary syndrome
symptoms of hepatobiliary syndrome
Hepatobiliary syndrome is characterized by hepatobiliary enlargement and discoloration. At the beginning of the disease, the liver is slightly enlarged, slightly anemia, slightly pale, and the gallbladder is darker and slightly greener. With the development of the disease, the liver is significantly enlarged, can be more than 1 times larger than normal, the liver color gradually becomes yellow and white, or patchy yellow- red and white, forming obvious "flower liver" symptoms, some make the liver partial or mostly become "green liver"; some livers are lightly touched and fragile, the gallbladder is obviously enlarged by 1-2 times (sometimes leading to bile spillage or gallbladder rupture), the bile color becomes dark green or dark green, or yellow and white until colorless, the heavy gallbladder is hyperemia and red, and the bile is also red. Sometimes, the spleen and kidneys of the diseased fish are also significantly enlarged, and the organ system is expanded at the same time. Due to the serious lesions and damage to the main organs, the body's disease resistance is reduced, giving the invasion of other germs an opportunity, so the severe patients with the disease are often accompanied by bleeding, gills, enteritis, rotten tail and other symptoms.
Three major causes of hepatobiliary syndrome
1. The breeding density is too large and the water quality deteriorates
It is the excessive density of aquaculture and the deterioration of the water environment. When the concentration of ammonia nitrogen in the water body is too high, the metabolites of ammonia in the fish are difficult to discharge normally and accumulate in the blood, causing the imbalance of fish metabolism and causing liver and gallbladder disease.
2. Indiscriminate use of drugs
It is indiscriminate use of drugs. Such as low doses, long-term addition of furazolidone, chloramphenicol, sulfonamides, etc. to the feed, or the use of fish drugs with large side effects and high residues such as dimethodia, copper sulfate and other drugs, resulting in liver damage.
3. Feed deterioration
It is the rancidity of the feed, the imbalance of nutrients and the toxic substances contained in the feed and the lack of vitamins.
Fish feed oxidation, rancidity, mold, deterioration. Fat is a substance that is easily oxidized, and the aldehydes, ketones and acids produced by fat oxidation are toxic to fish and will directly cause damage to the liver. Choline, ve, biotin, inositol, vb, etc. are involved in fat metabolism in fish, and the lack of the above vitamins will cause fat metabolism disorders in fish, resulting in fat accumulation in the liver and inducing liver disease.
Toxic and harmful substances such as gossypol in cotton meal, glucosinoside in rapeseed meal, and nitrite in inferior fishmeal can cause hepatobiliary diseases in fish.
prophylaxis
a. Scientific feeding (four principles): prepare nutrient-rich and comprehensive, excellent quality feed, scientific feeding should not be over-feeding;
b. Correct medication: do not add drugs that damage the liver of fish in low-dose, long-term feed, do not use fish drugs with large side effects and high residues, and cannot use national banned fish drugs or pesticides to replace fish drugs in water bodies.
c. Regularly mix internal medicine Xiyu super immune treasure (2000-3000 kg fish / bag) to enhance physical fitness, maintain the liver and gallbladder of fish, intestinal health, grass fish pond if conditions permit, feed fresh grass once a day.
treat
External use: Xiyu vc effervescent tablets + super concentrated organic acids (4-5 acres per group)
Internal use: Bacteria Biqing + Virus Qing + Super Immune Treasure (2000-3000 kg of fish per group) Continuous feeding of 5-7 days of dead fish serious need to be used externally high iodine or iodine yuan disinfection, during the treatment period feeding needs to be reduced
Notes:
1. The physique of fish is very weak when this disease occurs, so it is recommended not to use high iodine and iodine elements such as trichloroisocyanuric acid and other irritating disinfection drugs.
2. Although the intestinal lining of the fish is severely congested when this disease occurs, it is different from ordinary bacterial enteritis, so it is recommended not to use antibiotic preparations such as enrofloxacin and norfloxacin, and it is best to use Chinese herbal preparations for treatment, such as virus clearance, three yellow scatter, etc., and at the same time use super immune treasure to mix bait for internal use.