Protozoan parasites of fish in relation to water quality of some ecosystems in Egypt

The relationship between the protozoal infections of fish and the water quality of three sampling sites representing two different ecosystems was investigated. Sixteen physico-chemical parameters were analyzed namely; temperature, turbidity electric conductivity, salinity, PH, alkalinity, hardness, sulphate, phosphate, ammonia, nitrite. Nitrate, dissolved oxygen [DO[2]], biological oxygen demand [BOD], chemical oxygen demand [COD] and organic matter. There was a gradual increase in the incidence of parasitic protozoa in the different sampling sites, which could be related to the gradual decrease in DO[2] and the increase in the other parameters of water analysis. A positive correlation [R[2]] was found between the incidence of trichodina sp. and Apiosoma sp. and water turbidity. Also a positive correlation [R[2]] value was found between incidence of apiosoma sp. And concentrations of phosphate, nitrite and ammonia. While DO[2] correlated negatively with the incidence of both of trichodina sp. And apiosoma sp. Incidence of Henneguya sp. and trypanosome sp. Showed no relation with the different water quality parameters

Isospora solimanae [sp nov] from the Egyptian hoopoe [upupa epops major]

Isospora solimanae [sp. nov.] is recorded for the first time infecting the Egyptian hoopoe [Upupa epops major]. Unsporulated as well as sporulated oocysts were studied, photographed and compared with other isosporan infections of related birds. Site of infection and invasion limits were determined among naturally infected hoopoes and represented diagramatically. The rate of infection was approximately equal to 37.5% and its severity considered to be non-pathogenic, since no remarkable lesions were observed. No extra-intestinal site of parasite development was recorded

Fine structure studies of microgametogenesis of eimeria adenoids [eimeriidae, sporozoa] infecting turkeys in Egypt

The ultrastructure of microgametogenesis of Eimeria adenoeides was studied in the intestinal epithelium of experimentally infected turkeys' Meleagris gallopavo gallopavo. Microgamonts were recognizable by the presence of peripherally arranged nuclei and the presence of two centrioles between each nucleus and the limiting membrane of the gamont. A nuclear spindle apparatus and an intranuclear centrocone directed towards the centriole were observed. Each young microgamont was surrounded by a very narrow parasitophorous vacuole which widened during development and contained a few intravacuolar folds. Differentiation of the microgamete began when elevations of the limiting membrane appeared above the centrioles. This event was accompanied by the segregation of nuclear content into a dense osmiophilic portion and an electron-pale portion. A gradual protrusion of the dense portion of the nucleus and developing flagella into the parasitophorous vacuole was proceeded. Microgametes had an anterior perforatorium, a dense elongate nucleus, with an anteriorly positioned mitochondrion in a small groove of the nucleus. Usually, two flagella could be detected per each mature microgamete