一、预防方法1.放养前清除池底淤泥，彻底消毒池塘，杀灭媒介生物等。2.严格执行检疫制度，不从疫情地区引进苗种等。3.保持合理的密度。4.加强水质管理，投喂营养丰富饵料，提高鱼体抵抗力。5.养殖工具(网具、木桶、木瓢等)、食场等经常洗涤、消毒。定期检查，发现病害后及时 First, the precautionary approach 1. Clear stocking silt before stocking, thorough disinfection of ponds, killing vector organisms. 2. Strict implementation of the quarantine system, not from the epidemic areas such as the introduction of seed. 3 to maintain a reasonable density. 4. To strengthen water quality management, feeding nutrient-rich feed, improve fish resistance. 5. Breeding tools (nets, barrels, wooden ladle, etc.), food courts and other regular washing and disinfection. Regular inspection and timely detection of disease