Abstract：In order to prevent and cure the fish disease caused by Myxosporidia，the present research dealedwith parasitic Myxosporidia from Allogynogenetic craciun carp，including fauna of pathogeny，symptomand epidemiology. The essential pathogeny ispolymorphosporus. Discoverd the regtern of this disease emerging and develping and the popularity of the disease is caused by criesried pathogeny. We proposed several effective measures to prevent and cure this disease.ularthatpat-car
