Cyclocoelum microstomum and C. obscurum (Trematoda: Cyclocoelidae) from air sacs of waterfowl in Egypt: early life history, morphological and histological studies of adult.

Two species of genus Cyclocoelum are recorded from air sacs of waterfowls, collected from Egypt. Fully morphological and histological descriptions for the adult stage of C. microstomum from moorhen Gallinula chloropus are presented.

Morphological and histological observations on male of genus Paragorgorhynchus (Acanthocephala) with special reference to reproductive system.

The general morphology of Paragorgorhynchus aswanensis was studied by the scanning electron microscope and by histological examination. The major areas studied were proboscis and the receptacle with the associated muscles, the nerve ganglion with the retinacular nerve cells and the lemnisci. The details of genital system in whole mount preparation and photomicrographs of cross-section from wax preparation are depict, with morphological changes along the length of the mature male worm.

Influence of intercodon and base frequencies on codon usage in filarial parasites.

Base frequency, codon usage, and intercodon identity were analyzed in five filarial parasite species representing five Onchocercidae genera. Wucheria bancrofti, Brugia malayi, Onchocerca volvulus, Acanthocheilonema viteae, and Dirofilaria immitis gene sequences were downloaded from NCBI, and analysis was performed using locally designed computer programs and other freely available applications. A clear sequence bias was observed among the nematode species examined.

Effects of lead, mercury and cadmium on the extramolluscan larval stages of Schistosoma mansoni (Sambon).

The effects of the heavy metal pollutants, lead, mercury and cadmium on the survival and behaviour of miracidia and cercariae of Schistosoma mansoni were examined. Concentration ranges of 100-900 microM lead chloride, 0.25-20 microM mercuric chloride and 0.

The effects of lead, cadmium, and mercury on the mortality and infectivity of Schistosoma mansoni cercariae.

The effects of lead, cadmium, and mercury chloride salts on survival and infectivity of Schistosoma mansoni cercariae were examined. The LC 50 for 5 hr exposure was approximately 500 microM for lead, 2.5 microM for cadmium, and 6 microM for mercury.

The efficacy of ivermectin in treating rabbits experimentally infected with Eimeria as indicated parasitologically and histologically.

Ivermectin (Ivomec) was used as coccidiocidal drug against Eimeria in experimentally infected rabbits as indicated parasitologically & histologically. Twenty Bosskat rabbits, were divided in to 5 groups, 3 groups were inoculated with 1000 sporulated oocysts and the other 2 groups were kept as negative controls with and without Ivermectin administration. Ivermectin (1:10) was injected subcutaneously in a dose of 0.

The histopathological effect of metacercariae of the genus Brachylaima on the land snail, Monacha obstructa.

The histopathological changes in the kidney of the land snail Monacha obstructa and the histochemistry of the body wall of the parasite were studied. The histological pictures of the infected kidney showed extensive degree of degeneration in the renal tissue with multiple necrotic foci. Due to the mechanical and feeding effects of the parasite, the renal lamellae were disintegrated.

Morphological and anatomical studies on larval trematode of genus Brachylaima (Brachylaimidae) from the land snail, Monacha obstructa.

The metacercariae of genus Brachylaima were collected from the kidney of the land snail Monacha obstructa. About thirteen to fifteen metacercariae were collected from each snail. The metacercariae observed were elongated rather than oval.

Scanning electron microscope observations on Parapharyngodon bulbosus (Linstow, 1899) (Nematoda: Pharyngodonidae) from Egyptian Chalcides ocellatus.

The oxyurid nematode Parapharyngodon bulbosus was collected from the lizard Chalcides ocellatus from Egypt. Male and female worms were described by light and scanning electron microscopes. The specific characteristics of the worms were defined, including; mouth opening, cuticular surface of the body, genital cone and genital papillae in the male.

Ultrastructural study of the body surface and the flame cell of Oochoristica sp. (Cestoda: Anoplocephalidae).

Ultrastructural studies on the body surface of the adult tapeworm Oochoristica sp. revealed that all the strobilar surface including the scolex and the adhesive surfaces of the suckers are covered with long filamentous microtriches. Using scanning and transmission electron microscopes, the basic morphology of the microtriches was studied and found to be similar to those described in other cestodes but differs in having a relatively long basal regions.

Studies on larval digenetic trematodes of xiphidiocercariae from some Egyptian fresh water snails.

Six xiphidiocercariae are described from seven Egyptian snails, includes Cleopatra bulimoides, Malanoides tuberculata, Lymnaea cailliaudi, Bulinus truncatus, Biomphlaria alexandrina and Lanistes carinatus collected from Giza (Abou Rawash) and Qualiobyia (Qualiuob). Details are presented on the morphology, behavior of the cercariae, as well as other larval stages within the snails, with discussion and comparison between the previously described cercariae.

Larval stages of digenetic trematodes of Pirenella conica from Deversoir Ismailia, Egypt.

Two cercariae are described from the prosobranch snail Pirenella conica collected from Deversoir marine-water, Ismailia, Egypt. One of the ercariae is prepleuro-lophoercous group, belonging to genus Stictodora, while the second is a Ephemera monostome cercaria. The latter is a new record for Pirenella conica snail in marine water from Ismailia.

Larval occurrence of Hydatigera taeniaeformis Batsch (1786) (Cestoda: Taeniidae) in the liver of wild rodents in Egypt.

Hydatigera taeniaeformis Batsch (1786) was found in the liver of six species of Egyptian wild rodents. Wanas et al., (1990) found the total incidence of this larval stage to be 20.