VI. Atypical Newcastle Disease The disease mostly occurred in chickens that had been immunized with the Newcastle disease vaccine. Chickens and adult chickens usually have the most disease before and after the second and third immunizations. The incidence of the disease is high, but the mortality is low. If secondary infections such as E. coli and other diseases increase mortality. 1. The cause of the disease. Wild-type infections can cause chickens with reduced immune levels to cause morbidity; the choice of vaccines and the amount of vaccines used are inappropriate, such as the use of virulent strains IVH52 or I strains or clone I strains at the time of the second exodus of about 20 days; some use When the vaccine is added blindly, the dosage of I and IV lines is as high as 8 to 10 times or even 10 times, resulting in immunosuppression of the immune organs of the chicks; frequent immunization, some chicken farmers are anxious, and no obvious improvement after seedlings Frequently immunized frequently, the interval between seedlings and seedlings was too short, sometimes only 2 to 3 days apart, resulting in immunological paralysis in the immune organs of the chicks. 2. Clinical symptoms. Atypical Newcastle disease occurs mostly in chickens, young chickens and adult chickens over 30 days of age. Mainly manifested as lack of energy, loss of appetite, yellowish white and green loose stools, mucus in the mouth, and some have neurological symptoms, steamed head, curved neck, back circle, longer course of illness, can be attacked in case of irritation. 3. The necropsy changes. General glandular gastric papilloma hemorrhage is not obvious, and some only see a small amount of bleeding between the nipples or glandular stomach does not bleeding, stomach contents were bile green, intestinal lymph follicles visible more prominent uplift bleeding, cecal tonsil swelling hemorrhage, rectum a bit like Or a strip of bleeding. 4. Control. Timely immunization, the amount can not be arbitrarily doubled, do not frequently immunized, conditional persons can carry out antibody testing. When normal immunization is possible, the “New Epidemic†A phase produced by Dalian Sanyi Animal Drug Co., Ltd. can be used in conjunction with Newcastle disease vaccine (Note: “New Epimedium†is not suitable for use with Newcastle disease vaccines such as IVH120 and IVH52). Increase antibody levels. When the symptoms of atypical Newcastle disease still occur after immunization with Newcastle disease, the chickens can be spotted with 2 to 3 times the amount of Phase A of the new epilepsy produced by Dalian Sanyi Animal Drug Co., Ltd., and the B droplets are used 24 hours apart. Or drinking water, the effect is remarkable. Seven, coccidiosis Indoor warmth during brooding, if the humidity is high, it is susceptible to coccidiosis, 15 to 50-day-old chick the highest incidence. 1. Clinical symptoms. The diseased chickens are pale, gradually thin, with loose feathers, squatting down, red persimmons or bloody dilute feces, and some are all blood. Feathers around the colonies are contaminated, often with blood. 2. Pathological changes. When the disease is mild, there are undigested feed particles and red contents of persimmon in the small intestine, also known as "intestinal poison syndrome"; in serious cases, the cecum or small intestine becomes thicker, the intestinal wall expands and thickens, and the intestinal contents are blood. Or blood clot. 3. Prevention. To supply chickens with full-priced feeds rich in vitamin A, keep the poultry house clean and dry, avoid moisture, avoid overcrowding and overcrowding, and clean up and replace manure and litter in a timely manner to prevent contamination of feed and water by coccidial eggs. After 10 days of age, chicks should be given medicines for the prevention of coccidiosis. They should be used every 15 to 20 days for 4 to 5 days. There are many drugs used for the prevention of coccidia and they should be used interchangeably. In the outbreak of coccidiosis, drug treatment and defecation must be carried out in two directions, otherwise a large number of oocysts will be repeatedly infected and drug treatment will not work. Commonly used drugs for the treatment of coccidia are: (1) Sulfadimethoxine (SDM) is mixed in 0.1% to 0.2% of the feed to feed, or 0.05% to 0.1% of drinking water for 3 to 5 days. (2) Sulfaquinoxaline (SQ) was mixed at a 0.1% ratio for 3 days for 2 days, followed by 3 days. Or mix the feed at a rate of 0.0125% for prevention. (3) Amprolium mainly acts on Eimeria tenella and E. aureus. Feed concentration is 125ppm, safe and reliable. Speedy clothing has three functions for the treatment of rhinitis, enteritis and coccidiosis. The safe use of laying hens does not affect production. Eight, gout 1. The cause. The most common cause of gout in broiler chickens is in clinical practice. The main reason for this is that chickens are fed prematurely at the peak of egg-laying materials before they start production, and some even replace egg-yolk material at 90 days of age. Due to the high calcium content in laying hens' feeds, the uric acid content in the blood increases, causing the burden on the kidneys to increase, which in turn impairs the performance, impairs function, blocks the normal uric acid excretion, and leads to the formation of gout. 2. Clinical symptoms. At the beginning of the disease, there were no obvious symptoms, gradually showing a lack of spirit, loss of appetite, weight loss, anemia, atrophy of the cocks, paleness, thin stool, large amounts of urate, and a white lime aroma. 3. The necropsy. The heart, liver, spleen, gut serosa, and air bags, peritoneal surfaces, and even the inside of the tracheal wall are covered with a layer of powdery white urate. The kidneys are swollen, the color becomes lighter, and the renal tubules become thicker due to the accumulation of urate, forming a spotted kidney. The ureter becomes thicker, and the severe one is as thick as a chopstick or a cigarette. The lumen of the tube is filled with white, thick, urate, and when it is severe, gray stones can form in the ureter. 4. Control. One is to pay attention to changing the layer of chicken after the egg production rate rises to 5%; the second is to immediately adjust the feed formula to reduce the calcium content in the feed; the third is to use the drug containing urotropine to pass through the kidney and use it for 4 to 6 days ,Significant effect. Nine, vitamin B deficiency The growth and development of chicks is fast, and there is a large demand for various vitamins. Pantothenic acid and biotin deficiency are prone to occur. The most common symptom is the rough foot of the chicken and bleeding from the cracks in the skin between the toes. Timely addition of multivitamin B powder and biotin mixes are effective for 8 to 10 days. Rongcheng Jingyi Oceanic Technology Company Limited , https://www.jingyifoods.cn