Scanning electron microscopy and morphometric analysis of superficial corneal epithelial cells in dromedary camel ( Camelus dromedarius )

2021 ◽  
Author(s):  
Sameh M. Farouk ◽  
Samy F. Mahmoud ◽  
Haitham Eldoumani ◽  
Khaled Shoghy ◽  
Nazema S. Abdel‐Megeid ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Epithelial Cells ◽  
Morphometric Analysis ◽  
Camelus Dromedarius ◽  
Dromedary Camel ◽  
Corneal Epithelial Cells ◽  
Corneal Epithelial ◽  
Scanning Electron

scholarly journals Corneal epithelial cells division assessed by scanning electron microscopy

2020 ◽  
Vol 68 (10) ◽  
pp. 2252
Author(s):  
Carlos Rocha-de-Lossada ◽  
Josep Torras-Sanvicens ◽  
Jorge Peraza-Nieves
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Epithelial Cells ◽  
Corneal Epithelial Cells ◽  
Corneal Epithelial ◽  
Scanning Electron

Scanning electron microscopy of the operculum of Garra lamta (Hamilton) (Cyprinidae:Cypriniformes), an Indian hill stream fish

2010 ◽  
Vol 58 (3) ◽  
pp. 182 ◽  
Author(s):  
Swati Mittal ◽  
Usha Kumari ◽  
Pinky Tripathi ◽  
Ajay Kumar Mittal
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Epithelial Cells ◽  
Goblet Cells ◽  
Stream Fish ◽  
Male And Female ◽  
Fish Breeding ◽  
Inner Surface ◽  
Garra Lamta ◽  
Scanning Electron

The surface architecture of the epidermis on the outer surface of the operculum (OE) and the epithelium on the inner surface of the operculum (EISO) of Garra lamta was examined by scanning electron microscopy. The surface appeared smooth on the OE and wavy on the EISO. A wavy epithelium is considered to facilitate an increase in its stretchability, during the expansion of the branchial chamber. The OE and the EISO were covered by a mosaic pavement of epithelial cells with characteristic patterns of microridges and microbridges. Interspersed between the epithelial cells were mucous goblet cell pores, which were not significantly different in number in the OE and the EISO. Nevertheless, their surface area in the EISO was significantly higher than in the OE. This could be an adaptation to secrete higher amounts of mucus on the EISO for keeping the branchial chamber lining clean, avoiding clogging, the increased slipperiness reducing friction from water flow and increased efficiency in protecting against microbial attachments. Rounded bulges on the OE and the EISO were associated with mucous goblet cells. The absence of the taste buds in the EISO, in contrast to the OE, suggests that their function in the branchial chamber may not be of much significance in this fish. Breeding tubercles on the OE are believed to facilitate better contact between the male and female during breeding.

Morphometric analysis of the corneal endothelium of Yacare caiman (Caiman yacare) using scanning electron microscopy

2004 ◽  
Vol 7 (3) ◽  
pp. 205-208 ◽  
Author(s):  
Joao A. T. Pigatto ◽  
Marcos C. Andrade ◽  
Jose Luiz Laus ◽  
Jaime M. Santos ◽  
Dennis E. Brooks ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphometric Analysis ◽  
Corneal Endothelium ◽  
Scanning Electron

Pathogenesis of Corneal Lesions Caused by Moraxella bovis in Gnotobiotic Calves

1987 ◽  
Vol 24 (4) ◽  
pp. 287-295 ◽  
Author(s):  
D. G. Rogers ◽  
N. F. Cheville ◽  
G. W. Pugh
Keyword(s):  
Epithelial Cells ◽  
Virulent Strain ◽  
Corneal Epithelial Cells ◽  
Corneal Epithelial ◽  
Corneal Ulcers ◽  
Control Calf ◽  
Moraxella Bovis ◽  
Cellular Debris ◽  
Cell Processes ◽  
Scanning Electron

Moraxella bovis was instilled into the conjunctival sac of gnotobiotic calves and corneas were sampled serially after infection. Lesions developed in seven of eight infected calves, but were absent in a noninfected control calf. Histologically, M. bovis was first seen in foci of swollen epithelium and within basal epithelial cells adjacent to ulcers. Corneal ulcers were severe in later stages of infection; fibrin deposits, neutrophils, and bacteria were present in the stromas. Examination of early lesions by scanning electron microscopy showed M. bovis in pits on the surfaces of dark epithelial cells, enmeshed in degenerate epithelial cells and within erosions and an ulcer; in later samples, bacteria were rare. Ultrastructurally, M. bovis was seen in surface pits in superficial epithelial cell processes and within swollen epithelial cells. In stroma, M. bovis was frequently seen among collagen fibrils, within neutrophil phagosomes, and associated with cellular debris. This study demonstrates that a virulent strain of M. bovis can invade bovine corneal epithelial cells and can cause keratitis in the absence of injurious ultraviolet irradiation or other known predisposing environmental factors.

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