The disease is an acute, contact, immunosuppressive infectious disease in chicks and young chickens, and its pathogen is biflora rnavirus.
【Clinical Diagnosis】:
1. Sudden onset, lack of energy, decreased feeding, sagging wings, disheveled feathers, fear of cold, and piling up at the heat source.
2. Excrete rice soup-like and water-like white feces during the onset period, and there is fecal pollution around the anus. Green stool is often excreted during the convalescent period. Sick chickens can be seen pecking at their own cloaca. In the later stages of the disease, it is easy to secondary chicken newcastle disease, which increases the mortality rate.
3. Serious dehydration, dry toes and claws, sunken eye sockets, exhaustion and death. After one week of illness, the number of sick and dead chickens decreased significantly, and the flock recovered rapidly.
【Anatomical diagnosis】:
1. Sick and dead chickens are dehydrated, and there is strip or spotted bleeding in the chest muscles and leg muscles.
2. There are ulcers and bleeding spots at the junction of the muscular stomach and the glandular stomach, and the intestinal mucosa is bleeding.
3. Renal enlargement, pallor. The ureter is dilated and filled with white urate.
4. The bursa is large and covered with yellow transparent jelly. Swelling and bleeding in the inner folds, with inflammatory discharge or yellow cheese-like substances. Bursal atrophy in the later stages of infection.
【Differential diagnosis】:
Nephropathic infectious bronchitis:
Large groups of people have better spirits, have respiratory symptoms, drain white and thin stools, are obviously dehydrated, the kidneys are enlarged and pale, the ureters are full of urate, there is no bleeding in the muscles, and there is no change in the bursa.
Infectious fossitis:
Large groups of poor spirits, white or yellow-green stool, dehydration, enlarged and pale kidneys, urate in the ureter, bar bleeding in the legs and chest muscles, large and bleeding bursa of the bursa, purulent discharge or cheese-like inside.
Dehydration of chicks:
Chicks are prone to dehydration when they are hatched at one time or transported over a long distance, and the age of the disease is more than one week, the toes and claws are dry, and most of them are unilateral kidney enlargement and paleness, with urate. The ureter is enlarged and filled with urine and urate.
Sulfonamide poisoning:
Bleeding from the muscles of the chest and legs, yellowing of the bone marrow, and a history of medication. After stopping the drug, the condition improves or stops.
Resident leukocytosis:
The cockscomb is pale and depressed, with bleeding from internal organs such as kidneys, small white nodules or hematomas in the chest muscles, heart muscles and other parts, and small hematomas on fat.
Chicken anemia factor:
It occurs in chicks aged 1 to 3 weeks, sick chickens are depressed, bone marrow yellow stains, wings or abdomen subcutaneous bleeding, also known as blue wing disease. Atrophy of the thymus and bursal glands.
Chicken inclusion body hepatitis:
More often in broiler chickens aged 5 to 7 weeks, sick chickens are mentally weak, anemia, bone marrow yellow stains, liver has bleeding spots of varying sizes, and leg muscles have bleeding spots.
【Medication Regimen】
1. Astragalus polysaccharides or alfalfa blue granules + antiviral western drugs + baking soda (3/1000) + vija canon + drugs to prevent secondary infections
2. Egg yolk antibody (1-2ml) + hepatobiliary granules + Vicaneng + drugs to prevent secondary infection + baking soda (3/1000)