Scanning electron microscopy of the integument of schistosoma rodhaini

1986 ◽  
Vol 44 ◽  
pp. 132-133
Author(s):  
P. Evers ◽  
C. Schutte ◽  
C. D. Dettman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oral Sucker ◽  
Adult Male ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Sensory Receptors ◽  
East African ◽  
Dorsal Midline ◽  
Scanning Electron

S.rodhaini (Brumpt 1931) is a parasite of East African rodents which may possibly hybridize with the human schistosome S. mansoni. The adult male at maturity measures approximately 3mm long and possesses both oral and ventral suckers and a marked gynaecophoric canal. The oral sucker is surrounded by a ring of sensory receptors with a large number of inwardly-pointing spines set into deep sockets occupying the bulk of the ventral surface of the sucker. Numbers of scattered sensory receptors are found on both dorsal and ventral surfaces of the head (Fig. 1) together with two conspicuous rows of receptors situated symmetrically on each side of the midline. One row extends along the dorsal surface of the head midway between the dorsal midline and the lateral margin.

scholarly journals Ultrastructural study on morphology of Schistosoma spindale by Scanning electron microscopy (SEM)

2018 ◽  
Vol 10 (1) ◽  
pp. 347-351
Author(s):  
Kommu Sudhakar ◽  
G.S.S. Murthy ◽  
Udaya Kumar. M ◽  
Narasimha Reddy. Y ◽  
Lakshman. M ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ventral Sucker ◽  
Oral Sucker ◽  
Ultrastructural Study ◽  
Ventral Surface ◽  
Morphological Features ◽  
The Body ◽  
Perfusion Technique ◽  
Scanning Electron

The present study was undertaken to investigate the detailed morphological features along with morphometry of different structures of Schistosoma spindale (Adult flukes) which were recovered by a perfusion technique and visualized by Scanning Electron Microscopy (SEM). The length of spines on the oral sucker and ventral suckers were 2.6 µm and 2.5 µm, respectively. The measured width of aspinose area beneath the ventral sucker, rim of the ventral sucker and tegumental papillae were 5.4, 22.5 µm and 3 µm, respectively. Males have a welldefined gynaecophoric canal, originating just below the ventral sucker and extending up to the posterior end of the body, continued as a marked conical projection. The ventral surface of the oral sucker was completely covered with numerous spines. The ventral sucker was pedunculated, round, thick-rimmed and the inner side contained numerously pointed spines directed towards the center of the ventral sucker. The tegument surface of S. spindale showed ridged layers with large uniciliated and pit like papillae which were recorded more in posterior end. Thus, Scanning Electron microscopy (SEM) provided indepth ultrastructural morphological details of Schistosoma spindale which was in accordance with that of previous studies, would be applicable for its differentiation with other species (S. mansoni, S. bovis, S. haematobium, S. japonicum).

scholarly journals Scanning electron microscopy on Gotocotyla acanthura (Monogenea, Gotocotylidae) from Pomatomus saltatrix (Ostheichthyes, Pomatomidae) in Brazil

2011 ◽  
Vol 20 (4) ◽  
pp. 342-346 ◽  
Author(s):  
Maria Clara Pamplona-Basilio ◽  
Helene Santos Barbosa ◽  
Simone Chinicz Cohen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Genital Atrium ◽  
Posterior Extremity ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
The Body ◽  
Pomatomus Saltatrix ◽  
Muscular Structure ◽  
Scanning Electron

Gotocotyla acanthura (Parona & Perugia, 1896) Meserve, 1938 collected from the gills of Pomatomus saltatrix from the coast of the state of Rio de Janeiro state was analyzed using scanning electron microscopy (SEM). The study demonstrated the presence of a buccal cavity, a genital atrium on the ventral surface and a muscular structure on the dorsal surface at the level of the body constriction. An elongated haptor with 80 to 120 pedunculated clamps symmetrically distributed in two rows, with rib-like thickenings and a curved lappet bearing a pair of hooks at the posterior extremity of the body were also observed. The cirrus could be seen protruding from the genital atrium, armed with pectinate spines along its length and presenting up to eight pointed spines around the genital atrium.

scholarly journals Morphology of Metzgeria conjugata Lindb. (Metzgeriales, Hepaticopsida)

1992 ◽  
Vol 6 (1) ◽  
pp. 65-69
Author(s):  
Denise Pinheiro Da Costa ◽  
Raul Dodsworth Machado
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Outer Surface ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Epidermal Cells ◽  
Scanning Electron

Scanning electron microscopy and light microscopy were used to elucidate the morphology of Metzgeria conjutata Lindb. and confirm the presence of 2 rows of epidermal cells on the dorsal surface, (21-3) rows on the ventral surface, midrib with cells in (3-51-6) tiers; hirsute, short hairs, straight on the thallus-margin and on the ventral surface of midrib; marginal hairs paired, single or in groups of three; male branches globose or subglobose; female involucres obovate and hirsute at the margin, calyptra fleshy, pyriform to club-shaped, hirsute on the outer surface, hairs long and straight.

The surface topography of Benedenia sp. (Monogenea: Capsalidae)

1981 ◽  
Vol 59 (10) ◽  
pp. 1941-1946 ◽  
Author(s):  
D. K. Cone ◽  
M. Beverley-Burton
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Topography ◽  
Coastal Waters ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
The Body ◽  
Middle Zone ◽  
Tegumental Surface ◽  
Scanning Electron

The tegumental surface of Benedenia sp. (Monogenea: Capsalidae), a skin-dwelling parasite of Haemulon sciurus (blue-striped grunt) from coastal waters of Bermuda, was examined using scanning electron microscopy. The dorsal surface of the body and haptor is covered with comparatively long, flexible microvilli (2 to 3 μm in length; density 5/μm2), and the ventral surface of the body is covered with short, stubby microvilli (0.5 μm in length; density 10/μm2). The surface of the two anterior adhesive discs has three transverse zones which differ morphologically: the anterior region has a reticulate texture with uniciliated structures arising from some of the elevated ridges; the middle zone has a dense mat of short microvilli with scattered uniciliated structures, each of which is surrounded by a collar of shorter protuberances; the posterior zone is smooth and lacks ciliated structures. The ventral surface of the haptor is also smooth with the bare extremities of the accessory sclerites and the anterior and posterior hamuli protruding. The surface topography of Benedenia sp. is compared with that of other monogeneans.

Comparative Study of the Fine Morphology of Sensory Receptors in Aspidogaster conchicola and Cotylaspis insignis

1972 ◽  
Vol 30 ◽  
pp. 150-151
Author(s):  
Venita F. Allison ◽  
J. E. Ubelaker ◽  
J. H. Martin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Nervous System ◽  
Osmic Acid ◽  
Sensory Receptors ◽  
Transmission Electron ◽  
Sensory Structures ◽  
Fine Morphology ◽  
Scanning Electron

It has been suggested that parasitism results in a reduction of sensory structures which concomitantly reflects a reduction in the complexity of the nervous system. The present study tests this hypothesis by examining the fine morphology and the distribution of sensory receptors for two species of aspidogastrid trematodes by transmission and scanning electron microscopy. The species chosen are an ectoparasite, Cotylaspis insignis and an endoparasite, Aspidogaster conchicola.Aspidogaster conchicola and Cotylaspis insignis were obtained from natural infections of clams, Anodonta corpulenta and Proptera purpurata. The specimens were fixed for transmission electron microscopy in phosphate buffered paraformaldehyde followed by osmic acid in the same buffer, dehydrated in an ascending series of ethanol solutions and embedded in Epon 812.

Scanning electron microscopy of the tegument of adult Schistosoma curassoni, and comparison with male S. bovis and S. haematobium from Senegal

Parasitology ◽  
1986 ◽  
Vol 93 (3) ◽  
pp. 433-442 ◽  
Author(s):  
V. R. Southgate ◽  
D. Rollinson ◽  
J. Vercruysse
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Adult Male ◽  
Posterior Part ◽  
Male And Female ◽  
Electron Microscopical ◽  
Apical Area ◽  
Scanning Electron

SUMMARYScanning electron microscopical studies of adult male and female Schistosoma curassoni, male S. haematobium and male S. bovis are reported. The tubercles on the dorsal and dorso-lateral surfaces of male S. bovis are devoid of spines, whereas spines are present on the tubercles of male S. curassoni and S. haematobium. Some of the tubercles of S. curassoni and S. haematobium are completely covered in spines, whereas others have a spine-free apical area. Thus, on the isolates examined from Senegal it is concluded that adult male S. bovis can be easily distinguished from S. curassoni or S. haematobium on the basis of the structure of the tubercles. The surface of female S. curassoni is smooth, with transverse striations and a pitted appearance, apart from the posterior part where anteriorly pointing spines are found.

scholarly journals Histological Variation in Plethodontid Digital Surfaces [University of Findlay]

2019 ◽  
Author(s):  
Megan Pasternak ◽  
Justin Rheubert
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Light Microscopy ◽  
Morphological Evolution ◽  
Ventral Surface ◽  
Cellular Level ◽  
Plethodontid Salamanders ◽  
And Function ◽  
Scanning Electron

Despite numerous investigations into the morphology and function of toe pads in many species, most notably anurans and geckonids, there is relatively little knowledge on salamander digit morphology. To date, toe morphology in salamanders has been limited to Desmognathus fuscus, Ambystoma maculatum, Bolitoglossa sp., and Aneides aeneus. The limited studies to date have shown variation inter- and intra-specifically but have not investigated numerous taxa within a given family which may provide deeper insights into the causes of variation (phylogenetic vs ecological pressures). Therefore, to test hypotheses concerning the presence of variation in the ventral digital surface of plethodontid salamanders, we plan to use various microscopy methodologies to view the ventral surface of the digital tips of three species from three different genera within the Plethodontidae: Desmognathus, Eurycea, and Plethodon. Toe pads will be characterized grossly using scanning electron microscopy, histologically using light microscopy, and ultrastructurally using transmission electron microscopy. Preliminary results suggest that all three species investigated display enlarged surfaces. Surface morphology (assessed via scanning electron microscopy) varies between species at a gross level concerning the shape and overall orientation of the enlarged surface. Surface morphologies include a well-developed circular pad (D. fuscus), a well-developed oval pad (P. cinereus), and a poorly developed circular pad (E. cirrigera). Furthermore, surface morphology appears to vary at the cellular level as well, with Desmognathus having polygonal squamous cells with microprojections and Eurycea having polygonal cells with nanopillars in a honeycomb arrangement. These differences may be attributed to differences in habitat preference as the three species tested include a terrestrial, semi-aquatic, and aquatic dwelling species. However, further investigation including light microscopy and enhanced scanning electron microscopy are needed. Further understanding of the morphological variation will aid in our understanding of ecomorphology and understanding of morphological evolution in amphibians.

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