Moldy feed material poisoning

An acute or chronic toxic disease caused by the feed formulated with mildewed material after feeding the chicken. Mycotoxins are the cause of the disease. Three species are known to be the most harmful to chickens: aflatoxin, brown aflatoxin, and fusarium toxin. It occurs all the year round, but it has the highest incidence in the rainy season. If a batch of feed ingredients are contaminated with mold, then the chickens that consume the batch of feed will have an onset, and the onset time will generally be within 3-5 days after consumption, and will not exceed 7 days at the latest.

Symptoms: Within 3-5 days after eating the moldy feed, the chicks first showed decreased appetite, picky eaters, and more feed in the feed chute. At the same time, there was mutual feeding in the group. With the extension of time, many chickens in the flock were found to be debilitated, their feathers were loose, their movements were weak, their necks were constricted, and their wings were drooping. Severe diseased chickens, pale-faced, excreted feces with mucus or greenish-white diarrhea, and gradually emaciated, dying after 5-7 days, and gradually increasing. Some of them have too much mold and chickens with heavy poisoning. , An acute death occurred, and the symptoms of chickens for returning chickens were basically the same as those of chickens, but the symptoms of mutual feeding and kicking were much more severe than those of chickens. Diseases occurred after 5 to 7 days after the laying hens were eating mouldy feed. The surface of the feces is covered with a layer of copper-green urate, at which time most of the feces of the chicken are formed, and as time goes by, the feces increase rapidly and gradually turns into a dilute watery yellow-brown and green white. In the excrement, the more severe diseased chickens discharged the tea-like occult blood, severely squatted, the body temperature of the diseased chicken increased, the appetite decreased or did not eat, the water in the crop was sour and smelly, and the crown face color changed from bright red to dark red. Dry wrinkles, loss of luster, and finally into a dark purple, severe cases began to sporadic death, larger chickens will appear fleas, they feed each other feathers, anus, etc., in which the rectal prolapse, licking anal hazards, can make many Chicken egg fallopian tube, intestine When the road was killed and died, the egg production of the chicken rapidly declined, and the egg production of new hens began to increase soon after the start of production. At the same time, more soft shell eggs, thin shell eggs and sand shell eggs appeared.

Post-mortem examination: chronically poisoned chickens and reserved chickens were malnourished, weightless, and reddish pectoral muscles. Severe cases had serous exudation under the chest and muscles of the chest and thighs had red, purplish bleeding spots. Liver changes are more prominent, hepatomegaly, brown purple, the surface has many gray dots or dark purple spots, severe liver surface layer of white exudate. The heart is edema, bright and fat disappears. Egg-laying chickens and roosters: The contents of the crop are sour, the liver is yellow-brown and swollen, and there are many red and black-purple bleeding spots on the surface. The egg in the ovary becomes a cabbage pattern or ruptures, and the yolk flows into the abdominal cavity, causing peritonitis. The rooster is swollen with liver and kidneys, purple-red, bile, full of bile, testicular atrophy, severe congestion of the intestinal mucosa, and hemorrhage.

Prevention: Strictly control the procurement of raw materials, prevent moldy materials from entering the warehouse; control the temperature and humidity of the warehouse, pay attention to ventilation, do a good job of cleaning the corners of the warehouse, prevent raw materials from deteriorating in the storage process; prevent rain and moisture, and feed in the feed. Injecting nystatin 500,000 units/kg, spraying at the same time with amphotericin B at a dose of 250,000 units/cubic meter for 5 minutes, once a day, for two weeks; controlling feed processing, preparation, transportation, etc.; controlling feed The storage environment minimizes storage time and prevents feed from becoming moldy in poultry houses.

Prohibiting the use of mildewed feeds to feed chickens is a fundamental measure to prevent this disease. Identify or suspect moldy feed poisoning, stop use immediately, and replace high quality feed ingredients. Mild mildew feeds can be detoxified by methods such as aluminosilicate adsorption. 0.5% g/L copper sulfate or 5 g/L potassium iodide was added to the drinking water for the birds to drink freely. The two substances are used interchangeably and exchanged once every 3 days. Use hundreds of poisons to disinfect the troughs and sinks.

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