According to Cable (1956), a fellodistomid cercariae can be identified by the following characteristics: Distome, pharyngeate larva,
tegument spinose or smooth, eyespots present or absent, stylet lacking, excretory vesicle thin-walled, and a long and slender trichocercous tail, developing in marine bivalves.
Ultrastructural observations of the
tegument of Postorchigenes gymnesicus (Digenea: Lecithodendriidae).
Tegument covered with abundant setae and granules similar to those on carapace; cuticular pits absent.
12: cercarial body showing
tegument covered with large spines distributed in 9-10 transverse rows between anterior organ and ventral sucker; 13: cercarial body showing the penetration gland-cells.
These results show that there is no influence of the sarcotesta on the germination and vigor of the pomegranate seeds and that perhaps the presence of
tegument impermeable to water intake is one of the reasons that lead to delays and inequality in the germination process of these seeds.
Hemocytes were more sensitive than
tegument, intestine, and gill cells (Fig.
34), and sculpturing of
tegument as described in the third instar.
The schistosome
tegument contains numerous mitochondria, which could be the main target of [beta]-lap.
Tegument spined, postesticular area free of spines, Oral sucker, 0.045-0.064 X 0.040-0.053, terminal or slightly subterminal, armed with one complete row of 16-17 spines and 4-5 additional spines in dorsal side.
Macroscopic and microscopic analyses of the surgically removed material evidenced, besides fragments of other damaged specimens, a flat, brownish leaf-shaped organism measuring 2.5 x 1cm, with a cone-shaped projection followed by a body enlargement, a spiny
tegument, and two powerful suckers (Figure 1(a)).
Acidic mucosubstances stained with the AB stains were present mostly in the outer
tegument of the worm, the intestinal lining, and reproductive tubules (Figure 2(a)).
The neurological signs which were estimated in the initial and final testing were represented by: posture, hand flexion on the forearm, leg dorsiflexion, arm retraction, leg retarction, popliteal angle, heel to ear, scarf sign, head suspension, ventral suspension and out of the external features, the following were estimated:
tegument texture, edema, skin colour, skin opacity, lanugo, plantar ridge, nipple formation, breast size, ear consistency, feminine genital organs (with hips in semiabduction).
Histopathologic appearances of cysticercus larva have been well described in literature and reveal a superficial
tegument layer covered with microtriches, a cellular layer below that containing the cell nuclei and musculature, and a loose reticular layer characterized by canaliculi.
Of the total proteins, 21 have been found in the envelope, 10 in the nucleocapsid and 5 in the
tegument (putative structure located between the envelope and nucleocapsid).
