Tegumental ultrastructure of the juvenile and adult Himasthla alincia (Digenea: Echinostomatidae)

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Tegumental ultrastructure of the juvenile and adult Himasthla alincia (Digenea: Echinostomatidae).

The tegumental ultrastructure of juvenile and adult Himasthla alincia (Digenea: Echinostomatidae) was observed by scanning electron microscopy. One-, 5- (juveniles) and 20-day-old worms (adults) were harvested from chicks experimentally fed metacercariae from a bivalve, Mactra veneriformis. The juvenile worms were elongated and curved ventrally. The head crown bore 31 collar spines, arranged in...

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A scanning electron microscopic study was performed on the surface ultrastructure of Pygidiopsis summa (Digenea: Heterophyidae) adults. Metacercariae were collected from gills and muscles of mullets (Mugil cephalus) caught in a known endemic area, and adult flukes were harvested from dogs after 8 weeks of experimental infection. The worm was calabash form with its posterior part broader than th...

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Complete Mitochondrial Genome of Echinostoma hortense (Digenea: Echinostomatidae)

Echinostoma hortense (Digenea: Echinostomatidae) is one of the intestinal flukes with medical importance in humans. However, the mitochondrial (mt) genome of this fluke has not been known yet. The present study has determined the complete mt genome sequences of E. hortense and assessed the phylogenetic relationships with other digenean species for which the complete mt genome sequences are avai...

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Ultrastructure of pigmented photoreceptor of adult Crepidostomum metoecus (Trematoda: Digenea: Bunoderidae).

In adult fish trematode Crepidostomum metoecus (Braun, 1900) two pigmented eyespots were detected dorso-laterally to the pharynx. In contrast to most other digenetic trematodes the eyespots in C. metoecus persist throughout the life (cercaria, metacercaria, adult), but their role in the biology of the adult trematode is uncertain. The ultrastructure of the eyespots in Digenea has been studied i...

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Transmission electron microscopy of intra-tegumental sensory receptors in the forebody of Crepidostomum metoecus (Digenea: Allocreadiidae).

In the adult fish trematode Crepidostomum metoecus (Braun, 1900), four types of sensory receptors were observed inside the forebody tegument and one type beneath the tegument basal lamina. Two types of sensory receptors extend through the thickness of tegument and have a free cilium inside a pit (types I and II). Two types (III and IV) are nonciliate and entirely intra-tegumental in location. T...

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ژورنال

عنوان ژورنال: The Korean Journal of Parasitology

سال: 2003

ISSN: 0023-4001

DOI: 10.3347/kjp.2003.41.1.17