About the Authors

Tessa Bergsbaken

Affiliation Department of Microbiology, University of Washington, Seattle, Washington, United States of America

Brad T Cookson

To whom correspondence should be addressed. E-mail: cookson@u.washington.edu

Affiliations Department of Microbiology, University of Washington, Seattle, Washington, United States of America , Department of Laboratory Medicine, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

TB and BTC conceived and designed the experiments. TB performed the experiments. TB and BTC analyzed the data. TB and BTC wrote the paper.