Disease surveys were conducted in some areas of Hebei, Jiangsu, Liaoning, and Shandong with high concentrations of white-feather broiler farms. The surveys found that mycosis was severe, presenting as proventriculitis and gizzard inflammation complicated by airsacculitis, with a high mortality rate and substantial economic losses. The findings and prevention measures are summarized as follows:

　　I. Causes of the Persistent Spread of Mycosis

　　1, moldy corn

　　In recent years, demand for corn has been high and prices have continued to rise, making it a scarce agricultural product on the market. Buyers rush to purchase corn as soon as it is harvested and threshed, leaving it insufficient time to dry, which causes it to become moldy.

　　2, improper storage and handling

　　—After raw materials such as corn enter the farm, many farms, having no extra storage containers, store them outdoors or inside the chicken houses. They can easily become damp and moldy. Finished feed can also become moldy if stored for too long.

　　3, Poor feeding management

　　Temperatures and humidity are high inside broiler houses. If ventilation is not provided in a timely manner, mold growth inside the chicken houses can become severe. As the flock breathes, mold spores enter the lungs and air sacs, causing aspergillosis.

　　4, Insufficient understanding of the disease

　　The disease is widespread and can occur throughout the year. It is most common from 4 to 8 month. However, some veterinary drug distributors and farmers do not truly understand the disease and mistakenly believe it to be transmissible proventriculitis. In fact, many cases of gizzard inflammation and proventricular ulceration are lesions caused by mold and its toxins.

　　II. Measures to prevent and control mycosis

　　1, Prevention plan

　　(1) Ensure the quality and storage of corn are properly managed. Strictly inspect corn and other raw materials when purchasing. It is recommended not to purchase too much at once, to avoid mold developing during prolonged storage. Corn raw materials and finished feed should also be stored in a dedicated storage room to prevent mold.

　　(2) Strengthen husbandry management

　　Maintain appropriate ventilation in the chicken house, keep it clean and sanitary, and disinfect it regularly to prevent mold. Strengthen breeder management and remove moldy hatching eggs to avoid hatching weak chicks that may develop gizzard inflammation shortly after hatching, resulting in poor disease resistance and slow growth.

　　2, Treatment principles and plan

　　Principle: Inhibit and kill mold, eliminate mycotoxins, repair the gastrointestinal mucosa, and improve immunity.

　　Treatment plan: Suzhi + Qingjie Mixture + high-efficiency cod liver oil.

　　A special reminder: Clinically, mycosis generally does not cause a high mortality rate. If a high mortality rate is found in a flock of sick chickens, consider the possibility of concurrent diseases and treat them at the same time.