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[Comparative study of Campylobacter pyloridis and Campylobacter jejuni under electron microscope]
Hua Xi Yi Ke Da Xue Xue Bao = Journal of West China University of Medical Sciences = Huaxi Yike Daxue Xuebao
|September 1, 1990
Summary
Campylobacter pyloridis (Cp) and C. jejuni (Cj) share similar shapes but differ structurally. Cp possesses multiple sheathed flagella with bulbous tips, while Cj has single unsheathed flagella, and Cp has a denser surface layer.
Area of Science:
- Microbiology
- Cell Biology
- Electron Microscopy
Background:
- Campylobacter species are significant human pathogens.
- Distinguishing between Campylobacter species is crucial for diagnosis and treatment.
- Ultrastructural analysis provides detailed insights into bacterial morphology.
Purpose of the Study:
- To compare the ultrastructure of Campylobacter pyloridis (Cp) and Campylobacter jejuni (Cj).
- To identify key morphological differences that can aid in species differentiation.
Main Methods:
- Bacterial specimens were prepared using ultrathin sectioning.
- Negative staining and ruthenium red staining techniques were employed.
- Specimens were analyzed using transmission electron microscopy.
Main Results:
- Both Cp and Cj exhibited similar overall shapes.
- Cp displayed one to five sheathed flagella with bulbous tips at one end.
- Cj possessed a single unsheathed flagellum at each end without bulbous tips.
- Cp's cell body was longer than Cj's.
- Ruthenium red staining revealed a thick, dense filament-like layer on Cp's surface, with only minimal presence on Cj.
Conclusions:
- Distinct ultrastructural differences exist between Cp and Cj, particularly in flagellar structure and surface layer composition.
- These morphological distinctions can be valuable for the identification and differentiation of these Campylobacter species.
- Electron microscopy provides a powerful tool for detailed bacterial characterization.