河南省是水产养殖大省,近几年,随着养殖面积的不断增大和养殖产量的不断提高,水产养殖疾病也趋多样化,以前没有出现的疾病由于引种、运输、养殖生产等因素的影响,也频繁发生。盾纤毛虫是近 Henan Province is a major aquaculture province. In recent years, aquaculture diseases have become more diversified as the area of ​​breeding increases and the production of aquaculture continues to increase. Previously, diseases that did not occur were affected by such factors as introduction, transportation, and production of aquaculture , Also occur frequently. Shield ciliates are near