Sample preparative procedure for Pseudomonas aeruginosa observation under scanning electron microscope

Ngoc Hoa Binh Nguyen, Thi Thuy Vy Pham, Thuc Quyen Huynh, Thi Hiep Nguyen, Thi Thu Hoai Nguyen
Author affiliations

Authors

  • Ngoc Hoa Binh Nguyen School of Biotechnology, International University, Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
  • Thi Thuy Vy Pham School of Biotechnology, International University, Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
  • Thuc Quyen Huynh Reseach Center for Infectious Diseases, International University, Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
  • Thi Hiep Nguyen School of Biomedical Engineering, International University, Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
  • Thi Thu Hoai Nguyen Reseach Center for Infectious Diseases, International University, Vietnam National University Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam

DOI:

https://doi.org/10.15625/1811-4989/16934

Abstract

Scanning electron microscope (SEM) is a popular tool used for observing bacteria surface and morphology. Using Pseudomonas aeruginosa as a model, this work aimed to show a SEM preparative procedure that is simple and economical but does not result in considerable data loss. This was accomplished via testing fixing ability of 10% formalin versus 2.5% glutaraldehyde, efficiency of air drying versus t-butyl alcohol drying method. Following that, polypropylene, dialysis tubing and agar were also assessed for their ability to serve as a supporting material for cell adhesion in preparing sample for SEM. Consequently, obtained data showed that the procedure using 24-hour 10% formalin fixation and t-butyl alcohol drying preserved well bacterial morphology. With this procedure, little cell or membrane damage was seen while extracellular structures were clearly observed. Furthermore, when this procedure was applied with different types of substrates including polypropylene, dialysis tubing, and agar, it showed that sample fixed on polypropylene maintained well extracellular structures meanwhile sample fixed on agar presented well bacterial morphology. In conclusion, our data suggested that coating samples on polypropylene, followed by 24-hour 10% formalin fixation and t-butyl alcohol drying was appropriate for observing bacteria under SEM.

Downloads

Download data is not yet available.

Downloads

Published

28-12-2022

How to Cite

Nguyen, N. H. B., Pham, T. T. V., Huynh, T. Q., Nguyen, T. H., & Nguyen, T. T. H. (2022). Sample preparative procedure for Pseudomonas aeruginosa observation under scanning electron microscope. Vietnam Journal of Biotechnology, 20(4), 717–726. https://doi.org/10.15625/1811-4989/16934

Issue

Section

Articles

Most read articles by the same author(s)