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Department of Microbiology Faculty

John Helmann

John Helmann

Professor; and Chairman
Department of Microbiology Chair
Microbial physiology with a focus on Bacillus subtilis. We study physiological and genetic responses elicited by cell envelope stress (e.g. antibiotics), oxidative stress, and metal ion limitation and excess.
Esther Angert
Microbial ecology, microbial cellular biology, evolution of a novel bacterial developmental system and microbial phylogeny.
Tobias Doerr
Interest in bacterial stress pathways, with a special interest in peptidoglycan remodelign in Vibrio cholerae.
Anthony Hay
Environmental microbiology; metabolism of man-made pollutants, with specific applications to environmental toxicology.
Ian Hewson
Marine microbiology; biogeochemistry, diversity, and distribution of marine microorganism; metagenomics and metatranscriptomics.
Ruth Ley

Ruth Ley

Associate Professor
Moved to the Department of Microbiome Science, Max Planck Institute for Developmental Biology, Tübingen, Germany.
Dr. Eugene Madsen

Eugene Madsen


It is with the greatest of sadness that we inform you of the death of our longtime colleague and friend, Dr. Eugene (Gene) Madsen on Wednesday, August 9th.
This is truly a great loss to our department and to the Cornell community as a whole. He will be profoundly missed by everyone whose lives he touched.
Click here to view his obituary and details regarding his memorial service.
Joseph Peters

Joseph Peters

Professor; and Director of Graduate Studies
Chromosome integrity (Transposition; DNA Replication, Recombination and Repair); Functional Genomics.
James Shapleigh
Electron transport proteins of bacteria, in particular those proteins involved in the anaerobic respiration of nitrogen oxides.
Stephen Winans
Use Agrobacterium tumefaciens as a model to study how cells detect other cells; this plant pathogen detects a variety of chemical signal molecules released from host plant cells and also uses a type of bacterial pheromone called an autoinducer to estimate its population densities.
Stephen Zinder
Our laboratory studies microorganisms, particularly anaerobes, which carry out chemical transformations. Present areas of interest include physiology and molecular biology of nitrogen fixation in methanogenic archaea and ecology and physiology of microbial reductive dechlorination of toxic chemicals.