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The importance of this study to investigate some of the myxosporidian and microsporidian parasites infecting economically important marine fish of the Red Sea in Egypt by means of morphologic and morphometric characterization of these parasites, in addition to molecular analysis of their small subunit ribosomal DNA (SSU rDNA) and comparing them with those previously recorded on the GenBank. Also, to characterize some of the important structures of myxo- and microsporidian parasites at the ultrastructural level which are considered as key features for their classification; such as...

Crustaceans have a cyclic phenomenon, moulting, for development and growth that is not encountered in most other groups of aquaculture animals. Biochemical and physiological changes in various tissues of crustaceans occur during the moult cycle. Changes to the immune components of prawns in association with moulting have also been studied to a lesser extent. Hematological variation in both total hemocyte count (THC) and differentiated hemocyte count (DHC) was recorded in individuals and between species during the moult cycle. In the current investigation, we characterized the different...

The pathogenic mechanism of white spot syndrome (WSSV) in crayfish, Procambarus clarkii by the investigating activities of immune cells related to innate immune function during infection, which caused by white spot syndrome virus (WSSV) leads to devastating losses in crayfish farming. The WSSV protein VP28, can be used as subunit vaccines that can efficiently protect crayfish from WSSV disease. To detect the functions of VP28 and find a method to prevent this disease in red swamp crayfish P. clarkii, we constructed the plasmid vector of pleVP28. WSSV infection caused parts of the gill...