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Results for “TREMATODE INFECTIONS”

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At least 919 records · Page 51Linked to original sources
PubMed1990

Occurrence of some medically important flukes (Trematoda: Opisthorchiidae and Heterophyidae) in Nam Ngum water reservoir, Laos.

Occurrence of some medically important flukes transmitted to man by eating of raw fish was observed at 18 localities of Nam Ngum water reservoir, an important source of fish for inhabitants of Vientiane Province, Laos. Cercariae of Opisthorchis viverrini were recorded in 0.9% of Bithynia siamensis goniomphalus examined but in the most populated sites, where the density of the snails was the highest up to 2.2% of the intermediate hosts were infected. Haplorchis cercariae were found in 2.0% of Tarebia granifera examined. O. viverrini metacercariae were found in flesh of four fish species (Hampala dispar. H. macrolepidota, Puntius gonionotus, Cyclocheilichthys repasson) from 9 localities with the highest prevalence (16%) in H. dispar. Metacercariae of Haplorchis pumilio and H. taichui were found in flesh of Hampala dispar, H. macrolepidota and Puntius gonionotus with the prevalence of infection 2-6%. Metacercarie of Stellantchasmus falcatus were localized in fins of Xenentodon canciloides. Domestic cats (Felis catus f. domestica) harbored the following trematode species: O. viverrini, H. pumilio, H. taichui, H. yokogawai, S. falcatus. Eggs of small flukes were found in stools of 44% of examined inhabitants of 3 villages and of the district center Thinkeo. The study revealed that the best predictor of the existence of small fluke foci and their species composition in the area studied was the second intermediate host-fish.

Animals↗
PubMed1992

Scanning electron microscopy of cercariae, metacercariae and adults of Pygidiopsis ardeae Køie, 1990 (Digenea, Heterophyidae).

The penetration apparatus of the cercaria of Pygidiopsis ardeae Køie, 1990 (Heterophyidae) is provided with five large preoral hooklets. Various types of presumably sensory structures surround the small oral aperture. Small, pointed spines protrude throughout the cercarial body. After parasite penetration and encystment in the fish intermediate host, the metacercarial tegument increases its absorptive area by developing irregular projections. Concurrently the pointed spines become scale-like and serrated. The tegumental outgrowths appear to have regressed in infective metacercariae. The external surface of mature worms removed from the intestine of domestic chickens does not differ from that of infective excysted metacercariae. Adults taken from experimentally infected chickens were identical to specimens obtained from naturally infected herons.

Animals↗
PubMed1984

Praziquantel.

Explore the source record for details and available documents.

Animals↗
PubMed2003

Transmission, infectivity and survival of Diplostomum spathaceum cercariae.

The transmission dynamics of the cercariae of Diplostomum spathaceum were investigated under laboratory conditions using cercariae collected from naturally infected Lymnaea stagnalis. Cercariae were kept in a constant temperature of 20 degrees C and the survival and infectivity to naïve young rainbow trout recorded at 3-h intervals until few cercariae were alive. Mortality initially remained constant but increased rapidly after 20 h. While a model of constant mortality fitted the survival data, an age-dependent model provided a better fit and implied that cercariae tended to carry similar quantities of resources and once these were exhausted the cercariae died. Cercarial infectivity also showed an age-dependent pattern although infectivity tended (P = 0.09) to increase with age over the first 6 h of life and then fall. The per capita transmission rate of cercariae was investigated by experimentally infecting rainbow trout under standardized conditions, first with an increasing cercarial density and second, by keeping density constant but increasing numbers of cercariae. The per capita transmission rate was frequency dependent and averaged 0.341/h (+/- 0.036).

Animals↗
PubMed1977

Diseases of aquarium fish--2: skin diseases.

Brief descriptions are given of the common skin diseases in aquarium fishes. Many of these diseases are secondary to poor water quality and aquarium conditions and this primary cause should always be considered.

Animals↗
PubMed1998

[Parasitic eosinophilic lungs].

The eosinophilic lung is a term used to identify a heterogeneous group of parasitic diseases leading to common manifestations including alveolar or tissular pulmonary eosinophilia and, classically, radiological visible lesions of the lung. The different clinical presentations--Löffler's syndrome, larva migrans syndrome and tropical pulmonary eosinophilia are analyzed in this article and the particular features of the different causal parasites are discussed. Positive and differential diagnostic procedures in patients with pulmonary eosinophilia due to mycoses, drugs, vasculitis or an unknown cause are detailed.

Adult↗
PubMed1987

Parasitic infections in Singapore.

This paper describes various parasitic infections which are encountered in Singapore. These include the soil transmitted helminths, pinworms, Clonorchis/Opisthorchis, Hymenolepis, filariae, malarial parasites, Toxoplasma and other protozoal infections. The reasons for the transmission of these parasites in the republic are discussed. Some of the problems associated with their diagnosis are highlighted.

Cestode Infections↗