The key points of chicken mildew feed poisoning
Feeds formulated with mildewed raw materials that cause acute or chronic toxic diseases after feeding chickens. Mycotoxins are the cause of the disease. Three species are known to be the most harmful to chickens: aflatoxin, brown aflatoxin, and fusarium toxin. Poisoning occurs throughout the year, but the incidence is highest in the rainy season. If a batch of feed ingredients is 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 to 5 days after consumption, and will not exceed 7 days at the latest.
symptom
Within 3 to 5 days after eating the moldy feed, the chicken showed a decrease in 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 dilute water, and gradually thin, 5 to 7 days after death, and gradually increased. Some of the chickens that consumed too much mold and were heavily poisoned suffered acute death. The symptom of chickens in the reserve is basically the same as that of chickens, but the symptoms of mutual feeding and kicking are much more serious than those of chickens. Egg-laying chickens develop disease symptoms after eating moldy feed for 5-7 days. At the beginning, many of the chicken's feces were covered with a layer of copper-green urate, at which time most of the chicken's feces were formed. With the extension of time, the excrement rapidly increased, and gradually turned into a dilute watery yellow-brown and green-white feces, and the more severe sick chickens discharged tea-like occult blood. Severe diarrhea, sick chicken body temperature rise, loss of appetite or not eaten, there is sour and stagnant water in the crop, crown face color changes from bright red to dark red dry wrinkles, loss of luster, and finally into a dark purple, serious start Sporadic deaths, larger chickens will appear paralyzed, they feed each other feathers, anus, etc., in which the most prone to rectal, licking anus, can make many laying hens fallopian tubes, intestines were killed and died. At this time, the egg production of the chicken group dropped rapidly, and the egg production of the new hens that began production soon ceased to increase. At the same time, more soft shell eggs, thin shell eggs and sand shell eggs appeared.
Necropsy
Chronic poisoned chickens and reserved chickens were malnourished, weightless, and the pectoral muscles were reddish. Severe cases had serous exudation under the skin of the chest, and red and purplish bleeding spots were found in the pectoral and thigh muscles. 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 scrutinize the purchase of raw materials to prevent the storage of moldy raw materials; control the temperature and humidity of the warehouse, pay attention to ventilation, do a good job of cleaning the corners of the warehouse, prevent the raw materials from deteriorating in the storage process, prevent rain and moisture, and put them in the feed. Nystatin 500,000 units/kg, and spraying with amphotericin B at a dosage of 250,000 units/cubic meter for 5 minutes, once a day for two weeks; control of feed processing, preparation, transportation, etc.; control of feed storage Environment, try to shorten the storage time, prevent the feed in the poultry house mold deterioration.
It is a fundamental measure to prevent the disease by prohibiting the use of mildewed feeds to feed chickens. 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. Use hundreds of poisons to disinfect the troughs and sinks.
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