Parasitological research today focused on studying protozoan parasites infecting fish especially myxosporidian and microsporidian parasites which cause adverse effects on the fish health causing high losses in fish production. Also the presence of Heavy infections with muscle-invading species destroy the texture of the fish flesh making it unmarketable. Morphological description of these parasites help in the exact determination of their taxonomy which may aid with the molecular tools in the development of anti substances against these parasites. The present book described some of these...

Fish are well known to act as direct or indirect carriers of different zoonotic pathogens including parasites, viruses, bacteria and fungi. Parasitic infection is one of the most important problems facing fish breeding and production at commercial scales. So the most important reason for studying fish parasites is to study the relationships of these parasites to fishes, animals and man and also to understand some human health problems.The name "monogenea" means born once, and refers to the simple life cycle. In heavy infections, they can kill captive fish and occasionally wild ones.Gillworms...

Freshwater snails are used as sensitive biomarkers of aquatic ecosystem pollution. The potential impacts of zinc oxide nanoparticles (ZnONPs) on aquatic ecosystems have attracted special attention due to their unique properties. The present investigation was designed to evaluate the possible mechanisms of ecotoxicological effects of ZnONPs on freshwater snail Biomphalaria alexandrina. ZnONPs showed molluscicidal activity against B. alexandrina snails, and the LC50 was 145 ug/ml.Exposure to ZnONPs (7 and 35 ug/ml) for three consecutive weeks significantly induced malondialdehyde and nitric...

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...

Schistosomiasis remains a public health problem in the developing world. Biomplaraia alexandrina snails are the intermediate host of Schistosoma mansoni with wide spread distribution allover Egypt. Controlling of these snails by molluscicides is still one of the most promising means in the battle against this parasitic disease. In the present study, results indicated that the three herbicides (Amex 48%EC, Herphosate 48%SL and Stomp 50%EC) have molluscicidal effects on these snails and showed that stomp 50%EC is the most toxic herbicide than the other two. The three herbicides had a fast toxic...

Fish is a commodity of potential public health concern as it could contaminated with a wide range of environmentally persistent chemicals, including heavy metals and parasitism. The present study aimed to investigate some of helminth parasites infecting the most of economically important marine fish in Egypt. The collected fish were Anguilla anguilla, Lethrinus lentjan, Pagrus pagrus, Saurida tumbil, Siganus revulatus, Solea solea, and Sparus aurata. The present investigation of parasitic infections was carried out by means of morphologic and morphometric characterization of the isolated...

Protein deficiency is one of the major global challenges facing the third world today. In Egypt, the continuous increase in human population requires more food production to meet the consequent increasing demands. With the increasing demands for animal protein, the poultry sources were expensive and insufficient. Fish are considered to compensate the continuous lack of such element due to its comparatively low price. Therefore, more attention is being now focused on the development of the natural fish resources in general and aquaculture in particular in order to compensate for both...