Ascites syndrome in young broilers are gathered from the belly of a large number of slurry a syndrome characterized primarily against more than 4 weeks old chickens, the first 3 weeks of age occurred in chickens, the disease is the rapid growth of broilers One of ordinary disease. Young chickens because it can cause up to 35% of the mortality rate directly affects the chicken's economic benefits, it must draw close attention of broiler breeders.
1, the main symptoms: depressed chickens spirit, her head were drowsiness, single corner, disheveled feathers, slow response, ataxia, loss of appetite, desire to drink slightly increased, mild breathing difficulties, chest and abdomen appear edema, can be felt by touching a large number of intra-abdominal fluid.
Two pathological change: a large number of thoracic and abdominal gather the clearest transparent liquid. Cardiac hypertrophy, pericardial thickening, pericardial fluid increased size transparent, soft heart, relaxation, atrial expansion, particularly in the right atrium increased significantly; liver damage, hardening, thickening of hepatic lobe edge; kidney congestive swelling, and a urate deposition; gastrointestinal vascular congestion.
Three causes of morbidity: the disease has still not very clear incentives, and tendentious view that the chicken fast-growing requirements of the oxygen excess can not be timely and sufficient supply of oxygen due. Specifically include the following:
sheds through poor ventilation. Coop memory in a lot of ammonia, when the chicken after ammonia inhalation, the respiratory mucus secretion and airway wall thickening reduces the oxygen into the bloodstream.
stocking density is too large. Space for individual units have reduced intake of oxygen also decreased, carbon dioxide intake is relatively increased.
fed high energy feed. Rapid growth, the role of red blood cells carrying oxygen and nutrients to enhance delivery, oxygen consumption increased, leading to chronic hypoxia. Especially those fed with pellet feed more evident.
4, control measures: Ascites syndrome, Early symptoms of the general, to produce ascites course when it is late, treatment difficulties, they should prevent the main, mainly to improve the breeding environment, scientific management, scientific formula taken into consideration.
improve the breeding environment. In ensuring the chicken coop under the conditions of suitable temperature, to enhance ventilation to remove harmful gases discounted the harm, to ensure sufficient fresh air to be discounted. With the growth of age, ventilation volume will also increase, particularly late in the breeding, but should increase ventilation to meet the body's oxygen needs. Stocking density depends on the size of the chicken house ventilation to prevent the limited space for internal stocking density caused by the pursuit of lack of oxygen. Sheds in the farm to maintain the appropriate temperature, humidity easily damp bedding, damp bedding in the manure will have a lot of ammonia in the fermentation.
scientifically formulated diet. Reduce the dietary nutrient levels, broilers were fed in 3 weeks before the feeding of low-energy diet or high-energy limit, after 3 weeks of age to high-energy diet, may reduce morbidity. Dietary amino acid balance in ensuring appropriate while reducing appetite for protein. Lack of feed selenium, vitamin E or P will lead to ascites when, so the selenium content in the broiler feed should not fall below 0.12 mg / kg, vitamin E should also be appropriately increased Feeding Amount. Because the metabolism of selenium and vitamin E can produce toxic substances in the process of degradation, to prevent the destruction of peroxide on the cell membrane, the protection function of cell membrane integrity, maintain the cell's permeability, thereby reducing the incidence of ascites. Control the content of dietary fat, dietary fat content should be maintained at 6 weeks before the 1%, 7 weeks old when slaughter no more than 2%. Using powder instead of granules, powders used in broiler diets instead of granules, after reducing the incidence of ascites syndrome, particularly in low-lying areas, it is best to use powder for broiler chickens. Add a urease inhibitor, in the diet of additional 0.125% of hydroquinone, can gut ammonia concentration and urease activity decreased, thereby reducing mortality.
timely treatment of patients chickens. The chickens isolated chickens each oral Hydrochlorothiazide 6 mg, 2 times a day; in the new education per kg of chicken feed in the feed by adding the amount of 100 mg vitamin C, 3. The chickens can be severe ascites paracentesis, abdominal puncture site select the lowest point, in order to discharge fluid (liquid can not put too much time in order to avoid collapse), to prevent continued infection can also use antibiotics. Case of the disease in chickens as soon as possible to eliminate the cause.
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