进入春季,随着气温和水温的不断上升,各种病原生物活动加强,容易使鱼类感染各种疾病,尤其是寄生虫病容易暴发。各种生物致病因子如细菌、寄生虫孢子、孢囊处于发育早期,对药物最敏感,此时用药可保证药物达到最好的疗效。同时,鱼种、成鱼经过越冬期,体质较弱,对致病因子抵抗力相 Into the spring, with the rising temperature and water temperature, a variety of pathogenic organisms to enhance activity, easy to make fish infected with various diseases, especially parasitic diseases prone to outbreaks. A variety of bio-pathogenic factors such as bacteria, parasites spores, cysts in early development, the most sensitive to drugs, this time medication can ensure that the drug to achieve the best effect. At the same time, fish species, adult fish through the winter, weak constitution, resistance to pathogenic factors