Redescription of some monogenean parasites belonging to family: Ancyrocephalidae, bychowsky, 1937

Gills of 782 fish samples collected from the Suez Gulf Red Sea were examined for monogenean parasites. Four species of monogenean parasites belonging to family; Ancyrophalidae, were recorded. Pseudohaliotrematoids polymorphus eilaticus, and Pseudohaliotrema plectocirra from siganus reviulatus, Ancyrophalus atherinae, from Letherinus elongates and L. variegates and Haliotrema austral, from sclopsis ghanum

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

Some methods of inactivation or killing of encysted metacercariae in Tilapia muscles

Encysted metacercariae in muscles of fresh water fishes [Tilapia sp.] may be hazardous to consumer or fish-eating mammals, so the inactivation of these parasites by different methods of control such as chilling, freezing and irradiation were studied. Results indicated that chilling of Tilapia muscles at 5° is not enough to kill the encysted metacercariae, but simple freezing at [-10]° for a period not less than three days or deep freezing at [-20] for at least two days are enough to kill all of these encysted metacercariae. Irradiation of Tilapia muscles with small doses gamma rays not less than 300 k.rad is enough to inactivate the metacercariae encysted in these fish muscles. Trematodes of family, Heterophyidae are more resistant to freezing and irradiation than those of family Cyathocotylidae

Studies on some fish-borne trematodes in Egypt

Prohemistomum vivax, Haplorchis pumilio, Procerovum calderoni, and Echinochasmus perfoliatus digenetic trematodes of fish eating mammals and man were recovered from experimentally infected dogs with muscles of the following fresh water fishes, Tilapia spp., Glorias lazera, Bagrus bayad, and Shilbe mystus. P.vivax isolated from dogs infested with the muscles of any of these fishes, while H.pumilio and E. perfoliatus recovered from dogs infested with muscles of Tilapia spp. or Bagrus bayad fishes, but P.calderoni recovered from dogs infested with muscles of Tilapia spp., Bagrus bayad, or Shilbe mystus muscles. In this study Tilapia sp. and Shilbe mystus fishes are consider as a new second intermediate host for P.calderoni, while Bagrus bayad is a new second intermediate host for E. perfoliatus

Enteric parasitic fauna of horses in Cairo with a trial for chemotherapeutic control of gastrointestinal nematode

Coprological examination of 262 apparently normal horses, revealed that they were infested with Fasciola spp., Parascaris equorum, Oxyuris equi, Strongyloides westeri, Strongylus spp., Trichuris spp. and Eimeria spp. Trichuris spp. is firstly recorded from horses in Egypt. Foals below one-year old were highly infested with all the parasites, except for Eimeria spp. Oxyuris equi and Trichuris spp were only detected in cases above one-year old. Stalions showed a comparatively higher rate of infection than mares, except for Eimeria spp. Febantel [Bayer] was tried for the control of the studied parasites. It resulted in complete absence of eggs of Strongyloides and Oxyuris spp., but it was less efficient for Parascaris equorum and Strongylus spp

Some studies on encysted metacercariae in some Nile fishes

Some Nile fishes were investigated for the prevalence of encysted metacercariae in their meat, which was 54.03% The rates of infestation were 69.57, 62.71, 46.26 and zero in Tilapia sp., Bagrus bayad, Syndontis schall and Lates niloticus respectively. Monthly prevalence of encysted metacercariae revealed that the highest prevalence was in September in case of Tilapia sp. and Bagrus bayad and in December in Syndontis schall. Also seasonal incidence showed that Tilapia was equally infected during the four seasons. Bagrus bayad showed a high incidence during autumn and in Syndontis schall was during winter. Lates niloticus was free from metacercariae