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Updated: May 22, 2026
Biomimetic Materials to Characterize Bacteria-host Interactions
Published on: November 16, 2015
[Comparison of different magnetic beads for adsorption of pathogenic bacteria]
Qianqian Li1, Ping Chen, Changfei Ren
1College of Food Science and Engineering, Jilin Agriculture University, Changchun 130118, China. lqq_1986@163.com
Objective:
To establish a rapid enrichment method of pathogenic bacteria by comparing the adsorption capacity of the bare magnetic beads and immunomagnetic beads.
Methods:
With the precipitation method, the Fe3O4 magnetic beads were coated with silica and modified with the amino, which could immobilize antibody by cross-linking reaction. The adsorption capacity of different magnetic beads for pathogenic bacteria were compared.
Results:
The bare magnetic beads and Fe3O4/SiO2 immunomagnetic beads were prepared by chemical synthesis and chemical modification. There were significant differences in adsorption rates between immunomagnetic beads and magnetic beads (t = 7. 55, P < 0.05), the average adsorption rates were 96.62% and 80.89% respectively. Optimizing the washing condition, the adsorption rates of immunomagnetic beads for target and non-target bacteria were decreased from 97.03% to 93.67% and from 53.33% to 16.67% respectively. The adsorption rates of bare magnetic beads was reduced to 13.33% from 81%. No significant association was found in the adsorption rates of the immunomagnetic beads coating with single antibody and mixed antibody (P = 0.427).
Conclusion:
The target bacteria were specifically captured by the immunomagnetic beads coationg with single antibody and mixed antibody, and it could achieve good adsorption effect based on the enrichment iptimization.
