scholarly journals FIRST REPORT ON SURFACE ASPECTS OF Mansonella ozzardi (SPIRURIDA: ONCHOCERCIDAE) MICROFILARIAE BY SCANNING ELECTRON MICROSCOPY: PRELIMINARY RESULTS

2018 ◽  
Vol 47 (3) ◽  
pp. 195
Author(s):  
Yara Leite Adami ◽  
Aleksandra Menezes de Oliveira ◽  
Reinalda Marize Lanfredi in memorian ◽  
Marilza Maia-Herzog
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
First Report ◽  
Preliminary Results ◽  
Scanning Electron

A preliminary micromorphological analysis of Eleocharis (Cyperaceae) achenes for systematic potential

1991 ◽  
Vol 69 (7) ◽  
pp. 1533-1541 ◽  
Author(s):  
Francis J. Menapace
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Key Words ◽  
Cell Walls ◽  
Current Data ◽  
Systematic Assessment ◽  
Preliminary Results ◽  
Epidermal Features ◽  
Scanning Electron ◽  
Micromorphological Analysis

Eleocharis R. Br. achenes were examined employing scanning electron microscopy to ascertain the systematic potential of the achene wall. It was found that the epidermis has useful microscopic characters to assist in the systematic assessment of Eleocharis. Acid-treated achenes, with their cuticle and outer periclinal cell walls removed, revealed micromorphological differences in epidermal features among the 26 taxa studied. Characters of taxonomic interest include the configuration of the anticlinal cell walls, the contour of the cell lumens, in addition to the presence or absence of lumen pits, lumen depressions, and silica bodies. Such characters may be of value in assessing the infrageneric ranks of Svenson. Preliminary results support the Aciculares, Chaetarieae, Leiocarpeae, Multicaules, Ovatae, Palustres, Sulcatae, and Truncatae as natural taxa. In contrast, current data suggest that the Pauciflorae, Ocreatae, Rigidae, and Tenuissimae are unnatural entities. Key words: Cyperaceae, Eleocharis, SEM, achene, micromorphology.

First report of Schulzia travassosi (Nematoda, Trichostrongylina, Molineoidea) for amphibians of the Chaco region in Argentina and proposal of Oswaldocruzia melanostictusi nov. comb.

2015 ◽  
Vol 60 (4) ◽  
Author(s):  
Cynthya E. González ◽  
Monika I. Hamann
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
First Record ◽  
Nematode Parasite ◽  
First Report ◽  
Chaco Region ◽  
Males And Females ◽  
Almost All ◽  
Chaco Province ◽  
Scanning Electron

AbstractThis is the first record of the nematode parasite Schulzia travassosi (Trichostrongylina, Molineidae) in two Argentinean amphibians, Leptodactylus bufonius and Rhinella major, collected in two localities of the Chaco region, Las Lomitas (Formosa Province) and Taco Pozo (Chaco Province). The species was observed using light and scanning electron microscopy (SEM) and compared with previous studies of Paraguayan specimens. Regarding metric characters, the measurements found in Argentinean specimens generally did not differ from those of Paraguayan specimens; some differences were observed in the total length of males and females (some longer and some shorter than Paraguayan specimens), length of the oesophagus (in almost all specimens shorter than in Paraguayan ones) and position of the vulva (nearer to posterior end in Argentinean specimens). The branches and sphincter of ovejector are slightly longer than in Paraguayan female specimens. In males, ray 4 is almost the same length as rays 2, 3 and 5, 6. Cephalic end, cephalic vesicle, synlophe and vulvar depression were viewed under SEM. Schulzia melanostictusi Chopra, Shing and Kumar, 1986 is reassigned as Oswaldocruzia melanostictusi (Chopra, Shing and Kumar, 1986) nov. comb.

A study of Enterogyrus sp. (Monogenea) parasitizing the foregut of captive Pomacanthus paru (Pomacanthidae) in Georgia

1987 ◽  
Vol 65 (2) ◽  
pp. 312-316 ◽  
Author(s):  
D. K. Cone ◽  
J. B. Gratzek ◽  
G. L. Hoffman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Digestive Enzymes ◽  
Host Tissue ◽  
The Body ◽  
Body Axis ◽  
Main Body ◽  
First Report ◽  
Scanning Electron

A species of Enterogyrus Paperna, 1963 (Monogenea: Ancyrocephalidae) parasitizing the foregut of a captive Pomacanthus paru (Pomacanthidae) in Georgia was studied in situ both histologically and with scanning electron microscopy. The worms are found at the junction of the esophagus and stomach and arrange themselves with their main body axis directed perpendicular to longitudinal folds in the foregut wall. They cling to host tissue principally by blades of the pair of large dorsal hamuli and apparently rely little on the action of the pair of small ventral hamuli and the 14 marginal hooks. It is argued that this adhesive attitude allows unrestricted movement when peristaltic waves move along the gut and the worm thereby maintains a stable footing. The body tegument is unusually thick (2 to 5 μm) for the worm's size. Dorsally it is smooth and devoid of microvilli. Ventrally it is thrown into transverse folds having small microvilli and unique round to oval papillae that measure up to 7 μm in diameter. Evidently the modified tegument is an adaptation to life in the foregut, possibly serving to protect worms from digestive enzymes. The study represents the first report of Enterogyrus from a marine host.

scholarly journals Dermatosparaxis in two White Doper lambs in Brazil: case report

2015 ◽  
Vol 67 (3) ◽  
pp. 741-746 ◽  
Author(s):  
A.P.C. Silva ◽  
J.P.S. Mol ◽  
C.A. Carvalho Junior ◽  
T.A. Paixão ◽  
R.L. Santos
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Case Report ◽  
Genetic Disease ◽  
Collagen Fibers ◽  
Collagen Fibrils ◽  
Transmission Microscopy ◽  
First Report ◽  
Skin Fragility ◽  
Scanning Electron

Dermatosparaxis is a genetic disease that affects collagen maturation. This disease is characterized by marked impairment of the resistance of collagen fibers that leads to skin fragility, and it may affect several species. This is the first report of dermatosparaxis in sheep in Brazil. Clinically, two White Dorper lambs had multiple skin lacerations in the neck, dorsum and limbs. Transmission microscopy demonstrated irregular collagen fibers arranged in hieroglyphic shape and scanning electron microscopy demonstrated thin collagen fibrils that were not arranged in bundles as observed in the normal dermis. These findings are consistent with the diagnosis of dermatosparaxis.

Chrysophycean stomatocysts from Xinjiang Province, China

Phytotaxa ◽  
2016 ◽  
Vol 288 (1) ◽  
pp. 41 ◽  
Author(s):  
WANTING PANG ◽  
QUANXI WANG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Central Asia ◽  
Working Group ◽  
First Report ◽  
Low Diversity ◽  
Scanning Electron

Chrysophycean stomatocysts from 167 samples taken at 35 localities in Xinjiang Province, China were observed by scanning electron microscopy. The stomatocysts assemblages are characterized by low diversity and low abundance. Only 19 morphotypes were identified, of which nine are new to science. New stomatocysts were described following International Statospore Working Group (ISWG) guidelines. This is the first report of chrysophycean stomatocysts from Central Asia.

Light and scanning electron microscopy of Spirura rytipleurites seurati Chabaud, 1954 (Nematoda: Spiruridae) from Erinaceus europaeus in Sicily

1995 ◽  
Vol 69 (4) ◽  
pp. 305-311 ◽  
Author(s):  
S. Giannetto ◽  
G. Canestri Trotti
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Erinaceus Europaeus ◽  
First Report ◽  
Scanning Electron

AbstractNematodes identified as Spirura rytipleurites seurati are described and illustrated by light and scanning electron microscopy from specimens collected from the stomach of hedgehogs (Erinaceus europaeus) in Sicily. They differ from S. auriti, a stomach parasite of Hemiechinus auritus, in the length of body, the position of the second pair of post-cloacal papillae in the male and the structure of the spicules. The nematodes are classified as S. rytipleurites seurati, a stomach parasite of Erinaceus algirus, but they differ slightly from it in the dimensions of the eggs, that we measured in the uterus, and in the shape of the amphids. This appears to be the first report of S. rytipleurites seurati from Italy and from E. europaeus.

scholarly journals SEM evidence for existence of an apical disc on the scolex of Clestobothrium crassiceps (Rudolphi, 1819): comparative results of various fixation techniques

2012 ◽  
Vol 57 (3) ◽  
Author(s):  
Jordi Miquel ◽  
Zdzisław Świderski ◽  
Adji Marigo ◽  
Eulàlia Delgado ◽  
Jordi Torres
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Comparative Analysis ◽  
First Report ◽  
Longitudinal Groove ◽  
Apical Disc ◽  
Fixation Techniques ◽  
Comparative Results ◽  
Scanning Electron ◽  
Clestobothrium Crassiceps

AbstractThe scolex of the bothriocephalidean cestode Clestobothrium crassiceps was studied by means of scanning electron microscopy (SEM). The comparative results of various fixation procedures and techniques are presented. The scolex of C. crassiceps is oval to globular and exhibits two deep bothria which appear in the form of two lobes separated by a longitudinal groove. At the apex of the scolex, resembling a beret, an apical disc is present (oval, flattened and with a sinuous edge). Our results are compared with those previously reported in other species of Clestobothrium. This study represents the first report which highlights the presence of an apical disc in the scolex of C. crassiceps. It describes the effects of different procedures applied to our material during preparation and a comparative analysis results obtained using these various methods.

Pathogenesis of Human Hair Defects

1974 ◽  
Vol 32 ◽  
pp. 12-13
Author(s):  
P.S. Porter ◽  
T. Aoyagi ◽  
R. Matta
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Hair ◽  
Standard Techniques ◽  
Scanning Electron

Using standard techniques of scanning electron microscopy (SEM), over 1000 human hair defects have been studied. In several of the defects, the pathogenesis of the abnormality has been clarified using these techniques. It is the purpose of this paper to present several distinct morphologic abnormalities of hair and to discuss their pathogenesis as elucidated through techniques of scanning electron microscopy.

Ultrastructural Analysis of the Salivary Glands of Gromphadorhina Portentosa (Schaum)

1977 ◽  
Vol 35 ◽  
pp. 638-639
Author(s):  
P.J. Dailey
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Salivary Glands ◽  
Secretory Vesicles ◽  
The Past ◽  
Transmission Electron ◽  
Means Of Transmission ◽  
Gromphadorhina Portentosa ◽  
Scanning Electron ◽  
Topographical Relief

The structure of insect salivary glands has been extensively investigated during the past decade; however, none have attempted scanning electron microscopy (SEM) in ultrastructural examinations of these secretory organs. This study correlates fine structure by means of SEM cryofractography with that of thin-sectioned epoxy embedded material observed by means of transmission electron microscopy (TEM).Salivary glands of Gromphadorhina portentosa were excised and immediately submerged in cold (4°C) paraformaldehyde-glutaraldehyde fixative1 for 2 hr, washed and post-fixed in 1 per cent 0s04 in phosphosphate buffer (4°C for 2 hr). After ethanolic dehydration half of the samples were embedded in Epon 812 for TEM and half cryofractured and subsequently critical point dried for SEM. Dried specimens were mounted on aluminum stubs and coated with approximately 150 Å of gold in a cold sputtering apparatus.Figure 1 shows a cryofractured plane through a salivary acinus revealing topographical relief of secretory vesicles.

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