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Detection of bacteriophage infection and prophage induction in bacterial cultures by means of electric DNA chips
KTH, Superseded Departments, Biotechnology.
KTH, Superseded Departments, Fibre and Polymer Technology.
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2004 (English)In: Analytical Biochemistry, ISSN 0003-2697, E-ISSN 1096-0309, Vol. 324, no 1, 84-91 p.Article in journal (Refereed) Published
Abstract [en]

Infections of bacterial cultures by bacteriophages are common and serious problems in many biotechnological laboratories and factories. A method for specific, quantitative, and quick detection of phage contamination, based on the use of electric DNA chip is described here. Different phages of Escherichia coli and Bacillus subtilis were analyzed. Phage DNA was isolated from bacterial culture samples and detected by combination of bead-based sandwich hybridization with enzyme-labeled probes and detection of the enzymatic product using silicon chips. The assay resulted in specific signals from all four tested phages without significant background. Although high sensitivity was achieved in 4h assay time, a useful level of sensitivity (10(7)-10(8) phages) is achievable within 25 min. A multiplex DNA chip technique involving a mixture of probes allows for detection of various types of phages in one sample.. These analyses confirmed the specificity of the assay.

Place, publisher, year, edition, pages
2004. Vol. 324, no 1, 84-91 p.
Keyword [en]
virus identification, electric chips, multiplex magnetic beads, sandwich hybridization, escherichia-coli, bacillus subtilis, beads, rna
National Category
Biochemistry and Molecular Biology
URN: urn:nbn:se:kth:diva-23044DOI: 10.1016/j.ab.2003.09.020ISI: 000187566500012ScopusID: 2-s2.0-0344062863OAI: diva2:341742
QC 20100525 QC 20111101Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-11-01Bibliographically approved

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Gabig-Ciminska, MagdalenaHolmgren, AndersEnfors, Sven-Olof
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