HISTOPATHOLOGICAL STUDIES ON THE SHELL DISEASE OF WINTERING PENAEUS ORIENTALIS KISHINOUYE
Fan Kuihong (Hebei Fisheries Research Institute)
The histopathdlogical sections of the shell disease in various degrees show that pathological changes spread to two parts-the shell and the internals, with two kinds of tissue response-hyperplase and non-hyperplase. So it can be as- sumed that the prawn is infected with many kinds of pathogenic bacteria. Moreover, mucous secretion can be seen on the surface of the shell of the early infected prawn, which reveals that partial immunity reaction has appeared at that time.