JCVI: About / Bios / Orianna Bretschger
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Orianna Bretschger, Ph.D.
Assistant Professor

Research Interests and Accomplishments

Dr. Orianna Bretschger is an Assistant Professor in the Electromicrobiology group within the Microbial and Environmental Genomics department at the J. Craig Venter Institute (JCVI), San Diego. Dr. Bretschger has extensive experience in electrochemistry, reactor engineering and analytical chemistry. She also has broad knowledge about microbial ecology, physiology, and electron transfer mechanisms.

Dr. Bretschger led the effort to physiologically characterize Shewanella oneidensis MR-1 cytochrome mutants, which resulted in the identification of genes that are involved with extracellular electron transfer in microbial fuel cells, iron(III)- and manganese(IV)-oxide reduction. She has also developed experimental strategies and specialized equipment for the analysis of biological catalysts. Her primary research interests surround the practical application of microbial fuel cells for wastewater treatment and bioremediation of heavy metals; and as tools for studying microbial physiology and energy transduction within microbial communities.

Select Publications

McLean JS, Wanger G, et al.
Quantification of Electron Transfer Rates to a Solid Phase Electron Acceptor Through the Stages of Biofilm Formation from Single Cells to Multicellular Communities.

Environmental science & technology. 2010 Apr 01; 44(7): 2721-7.[more]

Chang IS, Bretschger O, et al.
Comparative Microbial Fuel Cell Evaluations of Shewanella Spp.

Electroanalysis. 2010 Mar 01; 22(7): 883-894.[more]

Harris HW, El-Naggar MY, et al.
Electrokinesis Is a Microbial Behavior That Requires Extracellular Electron Transport.

Proceedings of the National Academy of Sciences of the United States of America. 2010 Jan 05; 107(1): 326-31.[more]

Biffinger JC, Pietron J, et al.
The Influence of Acidity on Microbial Fuel Cells Containing Shewanella Oneidensis.

Biosensors & bioelectronics. 2008 Dec 01; 24(4): 906-11.[more]

Manohar AK, Bretschger O, et al.
The Use of Electrochemical Impedance Spectroscopy (EIS) In the Evaluation of the Electrochemical Properties of a Microbial Fuel Cell.

Bioelectrochemistry (Amsterdam, Netherlands). 2008 Apr 01; 72(2): 149-54.[more]

Manohar AK, Mansfeld F, et al.
The Polarization Behavior of the Anode In a Microbial Fuel Cell

Electrochima Acta. 2008 Mar 20; 53: 3508-3513.[more]

Bretschger O, Obraztsova A, et al.
Current Production and Metal Oxide Reduction by Shewanella oneidensis MR-1 Wild Type and Mutants.

Applied and environmental microbiology. 2007 Nov 01; 73: 7003-12.[more]

Chang IS, Moon H, et al.
Electrochemically Active Bacteria (EAB) and Mediator-Less Microbial Fuel Cells

Journal of Microbiology and Biotechnology. 2006 Feb 01; 16(2): 163-177.[more]