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Microchimica Acta

, 186:642 | Cite as

Visual detection of bacterial DNA using activated paper stripe

  • Yajing SongEmail author
  • Peter Gyarmati
Original Paper

Abstract

A rapid and accurate detection of pathogens is essential for bedside or on-site diagnosis. Filter paper is an ideal diagnostic tool as it requires no equipment, possesses a high surface-area-to-volume ratio and a high capacity of capillary force. The functionalization of the surface of cellulose filter paper was explored by using glutaric anhydride, N-hydroxysuccinimide, and N,N′-dicyclohexylcarbodiimide. The activated surface systems enable aminated DNA to be immobilized on the surface of filter paper. Both synthetic oligonucleotides and bacterial genomic DNA of Staphylococcus aureus, Escherichia coli, and Campylobacter jejuni were detected successfully. The system produces a clear, consistent and highly visible brown signal within 1–5 min. The digital image can also be analyzed quantitatively due to the brown color resulting from the presence of magnetic beads. Bacterial DNA detection was accomplished by using 16S rDNA probe on the activated paper surface for universal bacterial diagnosis. The method is stable and repeatable. It can detect at least 0.5 pmol of a 120-base synthetic oligonucleotide per assay and 5–10 ng of bacterial DNA per assay.

Graphical abstract

Schematic representation of the method: a. functionalization of cellulose filter paper, b. printing of aminated probes, c. incubation, d. blocking of unreacted functional groups (as dots shown), e. a visual detection of targets, f. quantitative analysis of image.

Keywords

Point-of-care testing Bacterial DNA detection 16S rRNA gene Surface-functionalization system Cellulose filter paper Superparamagnetic beads Glutaric anhydride N-Hydroxysuccinimide N,N′-Dicyclohexylcarbodiimide 

Notes

Acknowledgements

This study was funded by the University of Illinois College of Medicine at Peoria start-up fund to PG, and a research grant from the Rising Tide Foundation (grant number CCR-17-400) to PG.

The authors would like to express their acknowledgement to Bryan Himmel from the University of Illinois at Urbana-Champaign, for language editing.

Author contributions

Devised and designed the study: YS and PG. Performed the experiments: YS. Analyzed the images and data: YS. Drafted the manuscript: YS. Revised and agreed upon the manuscript: YS and PG. Provided reagents: PG.

Compliance with ethical standards

The authors declare that they have no competing interest.

Supplementary material

604_2019_3748_MOESM1_ESM.pdf (303 kb)
ESM 1 (PDF 302 kb)
ESM 2

(MP4 38,713 kb)

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Cancer Biology and PharmacologyUniversity of Illinois College of MedicinePeoriaUSA

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