多年来，在我国许多淡水养殖地区较普遍的流行了鱼类孢子虫病，且其发病率有逐年增长的趋势。特别在２００１年夏季北方及长江流域有些省份出现气候长期干旱情况下，它的病情来势凶猛，流行面更广。例如在东北地区该病原发生限于辽中区域，现扩大到辽阳、营口，江苏省扩至兴化 Over the years, many species of freshwater aquaculture in our country have become prevalent in fish sporidosis, and the incidence has been increasing year by year. Especially in the summer of 2001 when there was a long-term climate arid climate in some provinces in the north and the Yangtze River basin, its condition was fierce and the epidemic was even more widespread. For example, in the northeastern region of the disease is limited to the Liaozhong area, now expanded to Liaoyang, Yingkou, Jiangsu Province, to Xinghua